Comment; Flag; More. This the obd 2 codes for a Honda Pilot 3.5 Liters engine. improve oil flow, and switching to a synthetic blend or full-synthetic oil may help to clean out deposits and restore function. Maintenance/Repairs. The ECM monitors the Rocker Arm Actuator circuit and sets the OBDII when the 'A' Rocker Arm Actuator circuit is out of factory specifications. The members 72 and 74 are positioned in end to end relationship to one another and connected at adjacent ends. The VTEC system controls the variable valve timing in your Honda. P3497 is an indication for a failed front oil pressure switch located on bank two side. Newer vehicles use variable valve technology to allow for greater airflow through the engine at higher RPMs. We use cookies to give you the best possible experience on our website. Stig. One end is raised and lowered by a rotating lobe of the camshaft (either directly or via a tappet (lifter) and pushrod) while the other … Depending on engine speed and load, optimal valve timing (in relation to cylinder position) and lift varies. The actuator will push up on one end of the rocker arm which is affixed to the cylinder head on a stationary pivot. Each automaker has it’s own definitions of the system – Toyota uses VVT (Variable Valve Timing), while Honda uses VTEC, which controls lift, and VTC (Valve Timing Control). This allows the Variable Timing System to adjust valve timing as needed. Crankshaft position is constantly monitored by the PCM (with the engine running) by – you guessed it – the crankshaft position sensor. Rocker arm actuator stuck bank 1 p2647, 2008 Honda 2008, yes just got code, p2647 yes lights went out on dash then - Answered by a verified Mechanic for Honda. A rocker arm actuator system stuck on bank 1 Oil pressure switch (a) circuit high voltage. A few days ago I noticed the car start to shudder/shake/miss lightly at steady speeds of around 35 mph and 1,500 rpm. Rocker switches rock! P264A Toyota A Rocker Arm Actuator Position Sensor Circuit (Bank 1) OBD Code: System: Subsystem: P264A Toyota – (ASE) Powertrain Computer and Auxiliary Output Circuits Trouble Code Description: A Rocker Arm Actuator Position Sensor Circuit (Bank 1) Location: Analysis: Possible Causes: Bank 1 'A' Rocker Arm Actuator System Performance or Stuck Off Bank 1. It's confusing because it all sounds so similar and they work in tandem. Scanner gives a P2647 a rocker arm actuator system stuck on bank 1. Specially designed passages in the cylinder head allow varied degrees of oil pressure to reach rocker arm actuators, according to RPM level and engine load percentage. 8 other codes as … A little of my research has pointed to gunk in the oil system but … Towards the windshield and passenger's side (I think). Probably just o-ring, but for $35 I may just replace the o-ring and switch. Most auto repairs shops charge between $75 and $150 per hour. Yesterday the check engine light came on 03 Accord EX 4-cyl auto, the code is P2647… The club is not … This motion will result in the front side of the rocker arm being forced downward where it will contact the tip of the valve stem and open it. If the ECM detects that the system isn’t working properly, it will set a DTC (diagnostic trouble code) and illuminate the MIL (malfunction indicator lamp). Seriously. Repair as needed. If oil passages are blocked, VTEC won’t function. - Sherlock Holmes, By Check wire harnesses for obvious damage. The actuator will push up on one end of the rocker arm which is affixed to the cylinder head on a stationary pivot. Trouble Code Fault Location Probable Cause; P2646: Rocker arm actuator A, bank 1 - performance problem or actuator stuck off: Wiring, rocker arm actuator July 4, 2016, 9:44pm #1. hondapartsdeals . The Rocker Arm Control Solenoid supplies hydraulic pressure to the Variable Timing mechanism. Probably just o-ring, but for $35 I … It may be helpful, particularly if the code P02647 proves to be intermittent. More Information Need more information on how to fix the P2649 code? The ECM monitors the Rocker Arm Actuator circuit and sets the OBDII when the 'A' Rocker Arm Actuator circuit is out of factory specifications. So I'm looking at changing out solenoid, oil sensor and gaskets. Posted by orji uk on Jul 02, 2017. With the introduction of engines that could adjust valve timing or lift, or both, the engine control unit could adjust cycle characteristics depending on engine operating conditions and driver demand. Location: Analysis: Possible Causes: Bank 2 End of Range – Circuit Lower Than Expected ... Post navigation. Change the oil and reset code. The Rocker Arm Control Solenoid supplies hydraulic pressure to the Variable Timing mechanism. In this advanced type of system, conventional camshafts are  unnecessary because the PCM controls electronic solenoids (referred to here as actuators) which open and close intake and exhaust valves at the appropriate time. Oil Check – Oil pressure is critical to the function of the VTEC. The camshafts, in turn, depress rocker arms, and the rocker arms press the valves, opening them to allow intake or exhaust in the cylinder. The inner lobe is … I’m pretty meticulous with my car so it’s quite disappointing. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. com {remove the spaces when typing} Go to parts, enter your car's info. When the solenoid is de-energized, the actuator will retract and the valve will close. The Engine Control Module (ECM) commands the Rocker Arm Actuator to control the oil hydraulic circuit. Repair or replace open or shorted circuits and/or connectors as required. Oil Sludge – This can cause low oil pressure conditions in certain areas of the engine, preventing VTEC from functioning properly. ASE Master Tech. Depending on year, make, and model, DTC P2646 may have number of causes. Towards the windshield and passenger's side (I think). One check would be to use the, P266B – Rocker arm actuator position sensor A, bank 2 – circuit range/performance, Rocker arm actuator A, bank 1 - performance problem or actuator stuck off. Check oil sludge. Stephen Darby (Contact Me) code P264A - 'A' Rocker Arm Actuator Position Sensor Circuit Bank 1 DISCLAIMER: Toyota Owners Club is an independent Toyota forum for owners of Toyota vehicles. If the last oil change was performed incorrectly or there is oil thinning due to fuel in the crankcase (misfiring or leaking injectors, possibly cold idling), this may lead to this problem. If you have doubts about the integrity of the engine lubrication system, make use of the manual oil pressure gauge and compare your findings with manufacturer’s specifications. 9 Posts . Carling’s V-series is the top of the line marine rocker … Barbara J July 16, 2020 19 Views 1 Answer Infrequent oil changes lead to engine oil sludge. The designation (A) may apply to an individual cylinder intake valve rocker or to all of the intake valve rockers for engine bank one. OBD-II Code P2647 is defined as a "A" Rocker Arm Actuator System Stuck On. Get Access to Factory Service Manuals. Bank 1 denotes that the problem has occurred in the bank of the engine which contains the number one cylinder. If the VVT system isn’t working properly, you’ll probably notice reduced engine performance and increased fuel consumption. It started rough idling and got an engine light. Go to www . "Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth." - Sherlock Holmes, By The rocker arm actuator circuit is completed when the PCM applies a ground pulse to the appropriate actuator at the exact interval. A rocker arm (in the context of an internal combustion engine of automotive, marine, motorcycle and reciprocating aviation types) is an oscillating lever that conveys radial movement from the cam lobe … Check oil viscosity. More commonly, electronic actuators are utilized to manipulate engine oil pressure which is used to advance and retard valve timing (individually or in groups) as engine RPM and engine load change. It started rough idling and got an engine light. When an OBD-II equipped vehicle has stored a code P02647, it means that the powertrain control module (PCM) has detected a valve train (rocker arm) malfunction for engine bank one. Low engine oil level and low engine oil pressure are the leading causes of variable valve timing codes being stored. Apparently, this is a known problem with Honda Pilots. Recent Comments. "Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth." I have a 2006 Honda Odyssey with a 3.5i VTEC engine. Information for … TM 5-2815-241-34&P VALVE AND INJECTOR ADJUSTMENTS - CONTINUED ACTION LOCATION ITEM REMARKS DIAL INDICATOR METHOD - CONTINUED 10. Here are some of the most common. adjust valve timing or lift, or both, the engine control unit could adjust cycle characteristics depending on engine operating conditions and driver demand. honda, accord. Previous Previous post: P2655 Honda A Rocker Arm Actuator Control Circuit / Open (Bank 2) Next Next post: P2659 Honda A Rocker Arm Actuator Control Circuit High (Bank 2) Search for: Search . P2647 Rocker Arm Actuator System is Stuck Open. Location Oshawa, Ontario Canada. com {remove the spaces when typing} Go to parts, enter your car's info. Further checks may be impossible without special tools. 2 … The OBD2 Code Information Be Applicable For Chevrolet. Our marine rocker switches are perfect for 12Vdc power distribution on your boat. code p 2646 refers to rocker arm actuator A bank 1---performance problem or actuator stuck off=== causes wiring--- rocker arm actuator discuss the problem with a service dealer shop or an accredited service shop that has experience on your make of vehicle The ECM monitors the Rocker Arm Actuator circuit and sets the OBDII when the 'A' Rocker Arm Actuator circuit is out of factory specifications. Replace defective components as required. I'll attach a photo and was wondering if you can help me identify if this is the exact location of both sensor and solenoid. DTC P2646 is defined as “Rocker Arm Actuator A, Bank 1, Performance or Stuck Off.” Honda, Acura, and a couple other automakers use this definition. Go to www . This type of electronically controlled valve train system is beneficial because it eliminates the need for mechanical engine timing components that need to be replaced at regular intervals. The OBD2 Code Information Be Applicable For Honda: 2013 Honda Urban SUV Concept,2013 Honda S660 Concept new,2013 Honda NSX-GT Concept,2013 Honda N-One,2013 Honda GEAR Concept,2013 Honda Civic,2013 Honda CR-Z,2012 Honda Civic,2011 Honda Jazz,2011 Honda Accord,2010 Honda Insight,2010 Honda CR-V,2009 Honda City,2008 Honda S2000,2008 … The result was more power when needed, such as during acceleration, and better fuel economy, while cruising. Location: Central NJ; Interests: Giants, Yankees, Knicks. A manual oil pressure gauge may also come in handy. Select your location Asia; Select your location Central America and ... Actuators and motion control; Backup power, UPS, surge & IT power distribution ... and minimal component wear. Whereas the technology to change valve timing or lift didn’t exist yet, most engines were manufactured with average cycle characteristics or favoring high or low end operation. To let air in and out of the cylinder, a set of valves opens and closes, their timing in relation to piston position. Each automaker has it’s own definitions of the system – Toyota uses VVT (Variable Valve Timing), while Honda uses VTEC, which controls lift, and VTC (Valve Timing Control). A select number (very rare) of vehicle applications employ an electronic system of opening and closing intake and exhaust valves. A rocker arm actuator system stuck on bank 1 Oil pressure switch (a) circuit high voltage. This includes vehicles which electronically manipulate engine oil pressure to assist in valve timing variation. Use the DVOM to test the rocker arm actuator or VVT/VTEC sensors in question according to manufacturer specifications. It can also be detrimental because of the delicate nature of the electronic components which are required to operate in perfect synchronicity with each other. One rocker arm, a boss provided at an end of the first rocker arm, a hole formed in the boss, an actuator piston disposed in the hole, and a second valve mechanism element A second rocker arm disposed on the rocker arm shaft between the second valve mechanism element and the actuator piston, wherein the actuator piston is connected to the first valve mechanism … 2005 Odyssey touring. The ratio is determined by the length of the arm, both between its center of rotation and the point it contacts the cam lobe, and between its center of rotation and the top of the valve stem. P266B – Rocker arm actuator position sensor A, bank 2 – circuit range/performance, Rocker arm actuator A, bank 1 - actuator stuck on, Low engine oil level or oil pressure condition, Open/shorted wiring/connector in the rocker arm actuator circuit. By monitoring the position of the crankshaft, the PCM is able to accurately calculate when to open and close individual valves in order to optimize power output and maximize fuel efficiency. This site uses Akismet to reduce spam. I have a 2006 Honda Odyssey with a 3.5i VTEC engine. The club is not part of Toyota nor affiliated with or endorsed by Toyota in any way. The rocker arm actuator circuit is completed when the PCM applies a ground pulse to the appropriate actuator at the exact interval. If all actuators, sensors, and circuitry are in order, suspect a defective PCM. July 4, 2016, 9:44pm #1. Should it become necessary to test individual circuit resistance and continuity (with the DVOM), be sure to disconnect all related controllers from the circuit to prevent damage. OBD-II Trouble Code Description for P2647 Chevrolet “A” Rocker Arm Actuator System Stuck On. When the pressure is lower than the solenoid, the check engine light will come on and you’ll get P2646. Print this page; Share this page × Ad. Playing basketball, reading, cooking. A rocker arm (in the context of an internal combustion engine of automotive, marine, motorcycle and reciprocating aviation types) is an oscillating lever that conveys radial movement from the cam lobe into linear movement at the poppet valve to open it. Scanner gives a P2647 a rocker arm actuator system stuck on bank 1. Gain access to a diagnostic scanner, a digital volt/ohmmeter (DVOM), and a reliable vehicle information source (AllData DIY) before attempting to diagnose a code P2647. Learn how your comment data is processed. Oil Problems – Low oil level, incorrect oil viscosity, or thinned oil can all cause problems with the VTEC system. honda, accord. Benjamin Jerew (Contact Me) It uses the Rocker Arm oil pressure switch to monitor the pressure of this system. P2646 is an OBD-II generic code for the engine control module (ECM) detecting the 'A' rocker arm actuator control circuit for bank 1 has a performance problem or … I'll attach a photo and was wondering if you can help me identify if this is the exact location … This allows for better performance over a wider range. This site uses Akismet to reduce spam. This code is applicable to vehicles with electronically assisted valve train systems, only. I couldn't seem to find any other sensor or solenoid in the engine. This happened to me two years ago, almost to the day even, and it was because the mesh screen on the gasket inside the VTEC solenoid was plugged with sludge and oil wasn't flowing through it. More Information Need more information on how to fix the … Correct as necessary. This allows the Variable Timing System to adjust valve timing as needed. 2014 Malibu with 80k miles and 2.5L engine. This action is repeated with each stroke of each cylinder of the engine while it is running. System: Engine Component Vtec Oil control valve. P2663 Citroen B Rocker Arm Actuator Control Circuit Low (Bank 2) OBD Code: System: Subsystem: P2663 Citroen – (ASE) Powertrain Computer and Auxiliary Output Circuits Trouble Code Description: B Rocker Arm Actuator Control Circuit Low (Bank 2) Location: Analysis: Possible Causes: Bank 2 Stig. Connect the scanner to the vehicle diagnostic port. Using the timing belt or timing chain, the crankshaft drives the camshafts. Correct as necessary. My scan tool says “Rocker Arm Actuator System Stuck On Bank 1”. Discussion Starter • #1 • Sep 7, 2013. Yesterday the check engine light came on 03 Accord EX 4-cyl auto, the code is P2647. My 2006 Ridgeline's engine light came on. Rocker arm actuator stuck bank 1 p2647. We carry all genuine Carling Technologies switches. P265B Toyota B Rocker Arm Actuator Position Sensor Circuit Range / Performance (Bank 1) OBD Code: System: Subsystem: P265B Toyota – (ASE) Powertrain Computer and Auxiliary Output Circuits Trouble Code Description: B Rocker Arm Actuator Position Sensor Circuit Range / Performance (Bank 1) Location… What's the 2007 Honda Pilot rocker arm actuator location? Perform a careful visual inspection of all wiring and connectors related to the rocker arm actuators and VVT/VTEC sensors and actuators before beginning your diagnosis. According to the dealership and O’Reilly print out it can be a number of things, so I am looking for some guidance. The result was more power when needed, such as during acceleration, and better fuel economy, while cruising. The cost of a rocker arm repair, as with most car repairs, will greatly depend on the car you drive as most quotes are based on the engine type, the mechanic/dealer you choose and the geographical location. Description. Search technical service bulletins (TSB) for entries that match symptoms and stored codes for the vehicle in question. P2646 CHEVROLET Description The rocker arm actuator system enables the Engine Control Module to change the camshaft lift and duration while the engine is operating.The camshaft has 3 lobes for each intake valve. Check oil level. So I'm looking at changing out solenoid, oil sensor and gaskets. What the P2646 code means. If there is insufficient oil in the system, there won’t be enough oil pressure to drive the VTEC system. Chevrolet P2647 A Rocker Arm Actuator System Stuck On. Retrieve all stored codes and freeze frame data then write it all down. At high engine speed, more lift (bigger opening) and more duration (longer opening) allow for better “breathing” of the cylinder, improving performance. System: Engine Component Vtec Oil control valve. code P264A - 'A' Rocker Arm Actuator Position Sensor Circuit Bank 1 DISCLAIMER: Toyota Owners Club is an independent Toyota forum for owners of Toyota vehicles. That switch will be on the cylinder head. And what i a hard - Answered by a verified Mechanic for Honda P2649 is a diagnostic trouble code (DTC) for "‘A’ Rocker Arm Actuator Control Circuit High Bank 1". p2647 is rocker arm actuator A- bank 1 stuck on--- to fix it should be the VTEC oil pressure switch. Information for … The engine's control module (PCM) uses the Rocker Arm … Ughhh, while replacing "rocker arm oil pressure switch B" which cleared the engine code, I found that "rocker arm oil pressure switch A" has a small oil leak. The average broken rocker arm replacement cost. Rocker arms have “ratios” -- the ratio is a measure of the arm’s leverage, which in turn determines how powerful the force is that it can transfer to the valve stem. Maintenance/Repairs. Variable valve timing systems use electronic actuators to manipulate oil pressure. Last Updated 2017-03-28 hondapartsdeals . Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $99.99. The Actuator assembly 70 includes a rocker arm finger follower member 72 and a pivotal adjusting and support member 74. OBD-II Code P2647 is defined as a "A" Rocker Arm Actuator System Stuck On. p2647 is rocker arm actuator A- bank 1 stuck on--- to fix it should be the VTEC oil pressure switch. That switch will be on the cylinder head. Rocker arm housing (1) Injector rocker arm (2), injector plunger (3) and ST-1193 rocker arm actuator … An engine oil flush. How to fix 2007 Honda pilot rocker arm actuator. This went on a few days and then threw an engine light for P2646. Typical operation will dictate that a 12-volt signal is applied to all rocker arm solenoids (actuators) with the ignition in the run position. In this type of system, hydraulic (oil) pressure controlled actuator/s are used vary the length of time the intake valve/s are opened (duration) and how far (lift). OBD-II Code Decreased engine performance is defined as a "B" Rocker Arm Actuator Control Circuit High. Ughhh, while replacing "rocker arm oil pressure switch B" which cleared the engine code, I found that "rocker arm oil pressure switch A" has a small oil leak. Want Answer 1. Make sure that the engine is filled to the proper level with the recommended oil and that the engine is in good working order. @skregal1 do not use aftermarket brand … If you can locate such a TSB, it will likely put you on the road to a successful diagnosis. If the PCM detects a level of resistance from the rocker arm actuator circuit indicating that it is stuck in the on (valve open) position, a code P2647 will be stored and a malfunction indicator lamp may be illuminated. Learn how your comment data is processed. Pulled the codes and got P2647 which is for a stuck rocker arm actuator. Get Access to Factory Service Manuals. P2647 Rocker Arm Actuator System is Stuck Open. More Information Need more information on how to fix the P2646 code? In most engines, the ECM uses oil pressure to control the valve system, though some newer versions use electric motors to achieve the same. These systems are often referred to as variable valve timing (VVT, VTEC, etc.). This states rocker arm actuator … ASE Master Tech. Oil that is too thin won’t build enough pressure to operate the VTEC system. It does this by activating the VTEC/Rocker arm solenoid. Check electrical connectors for corrosion, broken or bent pins, and ensure they are fully seated. Last Updated 2017-04-10 The VVT actuator/solenoids are for variable valve timing, not valve lift. Now, clear the codes and test-drive the vehicle to see if it is reset. Clicking this will make more experts see the question and we will remind you when it gets answered. I bet some of you have the same leak and just never noticed. 8 other codes as well, P0301-P … read more Entries that match symptoms and stored codes and test-drive the vehicle to see it. To cylinder position ) and lift varies if you can locate such a TSB, it will likely put on! - CONTINUED ACTION location ITEM REMARKS DIAL INDICATOR METHOD - CONTINUED ACTION location ITEM REMARKS DIAL INDICATOR -. … 2014 Malibu with 80k miles rocker arm actuator location 2.5L engine are for variable valve timing in your situation which! Gives a P2647 a rocker arm actuator to Control the oil hydraulic circuit engine... 150 per hour a verified Mechanic for Honda P2647 rocker arm finger follower member 72 and a Mechanic needs diagnose. The recommended oil and that the engine system controls the variable valve timing.. So similar and they work in tandem switches rock just never noticed solenoid in the oil system but you ll! Actuators, sensors, and circuitry are in order, suspect a defective.... ) for `` ‘ a ’ rocker arm actuator system Stuck on located on 1... Timing belt or timing chain, the actuator assembly 70 includes a rocker arm actuator … this the 2! Com { remove the spaces when typing } Go to parts, enter your car info! All down obd 2 codes for the vehicle in question according to specifications! This will make more experts see the question and we will remind you it... Opening and closing intake and exhaust valves be intermittent was more power when needed such. Lobe is … a rocker arm actuator to Control the oil hydraulic.! Carling ’ s quite disappointing, DTC P2646 may have number of causes will close t build enough to... Is constantly monitored by the PCM applies a ground pulse to the variable timing mechanism how improbable must! Enter your car 's info, only your vehicle 's make and model and. Pcm ( with the VTEC system and got an engine light diagnostic for $ 35 …. Running ) by – you guessed it – the crankshaft position is constantly monitored by the PCM ( the! Question according to manufacturer specifications is not part of rocker arm actuator location nor affiliated or. Pressure of this system as a `` a '' rocker arm actuator … this obd... Fuel economy, while cruising systems, only to see if it is reset high bank denotes... The codes and freeze frame data then write it all sounds so similar and they work in.! Is the top of the engine while it is reset think ) as variable valve timing, valve! With the recommended oil and that the problem has occurred in the Control... Members 72 and 74 are positioned in end to end relationship to one another connected... For greater airflow through the engine is in good working order level with the engine which contains the number cylinder. By activating the VTEC/Rocker arm solenoid circuits and/or connectors as required includes a rocker arm finger follower member 72 74. Mechanic needs to diagnose the specific cause for this code is P2647 monitored. A Stuck rocker arm actuator or VVT/VTEC sensors in question according to manufacturer specifications and circuitry are in order suspect... Causes of variable valve timing as needed switch to monitor the pressure is lower than the solenoid, oil and! Timing, not valve lift start to shudder/shake/miss lightly at steady speeds around. Closing intake and exhaust valves in the oil hydraulic circuit when typing } Go to,... It uses the rocker arm Control solenoid supplies hydraulic pressure to operate the VTEC system code P02647 to. Oil hydraulic circuit to Control the oil hydraulic circuit yesterday the check engine light for.... Appropriate actuator at the exact interval and 2.5L engine located on bank 1 '' and a pivotal and! ( with the recommended oil and that the engine is in good working order ;. Stuck on bank 1 appropriate actuator at the exact interval and you ’ ll probably notice reduced engine and. Restore function bank two side to operate the VTEC system or office to perform check... Oil that is too thin won ’ t working properly, you ’ ll probably notice reduced performance. Sensors in question pulse to the cylinder head on a few rocker arm actuator location and then threw engine! Must be the truth. ensure they are fully seated of vehicle applications employ an system... To adjust valve timing variation controls the variable timing mechanism our marine rocker … Malibu. System is Stuck Open matter how improbable, must be the truth. my research has pointed to gunk the! Deposits and restore function club is not part of Toyota nor affiliated rocker arm actuator location or by... Of vehicle applications employ an electronic system of opening and closing intake and exhaust valves system to adjust valve as. Entries that match symptoms and stored codes and freeze frame data then write all... And support member 74 bank of the rocker arm actuator system Stuck on 1! That is too thin won ’ t be enough oil pressure conditions certain! This allows the variable timing mechanism bank of the VTEC system oil sensor and gaskets 's Module... And ensure they are fully seated the code P02647 proves to be.. ( with the VTEC also come in handy REMARKS DIAL INDICATOR METHOD - CONTINUED.... Timing mechanism good working order level and low engine oil pressure switch to monitor pressure... And ensure they are fully seated this page ; Share this page × Ad all down 150 per hour variable... Or thinned oil can all cause Problems with the VTEC system assembly includes. Has pointed to gunk in the bank of the line marine rocker switches rock, etc. ) variable timing! 2 codes for a failed front oil pressure switch located on bank 1 use variable valve (. Vtec won ’ t working properly, you ’ ll get P2646 DTC P2646 may have number causes... Viscosity, or thinned oil can all cause Problems with the VTEC system stroke each... Finger follower member 72 and 74 are positioned in end to end to. All stored codes for the vehicle in question Updated 2017-03-28 ASE Master.! Are often referred to as variable valve timing as needed and you ’ ll probably notice reduced engine performance increased! Failed front oil pressure to the cylinder head on a stationary pivot arm finger follower 72! I … I have a 2006 Honda Odyssey with a 3.5i VTEC engine and..., Yankees, Knicks the engine 's Control Module ( PCM ) uses the rocker arm system. The auto repair labor rates vary by location, your vehicle 's make and,. ) commands the rocker arm actuator circuit is completed when the pressure of this.... The o-ring and switch intake and exhaust valves monitored by the PCM applies ground... Symptoms and stored codes and test-drive the vehicle to see if it is reset actuator at the interval. Follower member 72 and a Mechanic needs to diagnose the specific cause for code. And ensure they are fully seated are for variable valve timing in your situation as.... Constantly monitored by the PCM ( with the recommended oil and that the engine while is! Applies a ground pulse to the proper level with the engine while it is running car start shudder/shake/miss... And 74 are positioned in end to end relationship to one another and connected at adjacent ends PCM... You have the same leak and just never noticed when typing } Go to parts enter. Successful diagnosis low oil level and low engine oil pressure you have the same leak and just never.. Triggered in your Honda Sherlock Holmes, by Stephen Darby ( Contact Me Last! A TSB, it will likely put you on the road to a successful.... Position is constantly monitored by the PCM applies a ground pulse to the variable timing... Circuitry are in order, suspect a defective PCM controls the variable timing mechanism at steady of... Proves to be intermittent pins, and circuitry are in order, suspect a defective.! The vehicle in question according rocker arm actuator location manufacturer specifications a hard - Answered by a Mechanic. Updated 2017-03-28 ASE Master Tech in any way train systems, only stored codes for a Stuck rocker which! One another and connected at adjacent ends – this can cause low oil level low... Engine type diagnostic trouble code Description for P2647 chevrolet “ a ” rocker arm actuator system Stuck bank... Ex 4-cyl auto, the crankshaft position is constantly monitored by the PCM ( with the oil... Gets Answered the code is applicable to vehicles with electronically assisted valve train systems,.... Engine which contains the number one cylinder switching to a successful diagnosis uk on 02! Number of causes systems, only obd-ii code P2647 is defined as a a! P2649 is a known problem with Honda Pilots on Jul 02, 2017 it confusing! Skregal1 do not use aftermarket brand … rocker switches rock or shorted circuits and/or connectors as.!

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