Was told to get an oil change to see if that helped, it didn't. Do an oil/filter change. What is possible causes? P2646 is a common diagnostic trouble code that affects Honda made vehicles, including the Shuttle. I … The Rocker arm oil pressure switch verifies the correct oil pressure in the Variable Valve Timing (VVT) mechanism, and is often referred to as the VTEC (Variable Valve Timing & Lift Electronic Control) switch. improve oil flow, and switching to a synthetic blend or full-synthetic oil may help to clean out deposits and restore function. After driving about one mile, the MIL came back on. 2007 honda pilot with dtc p2647.had replaced all rocker arms in rear bank as per tsb and replaced the vcm assembly and still has same code.checked the power from pcm ro vcm assembly and it had 3.5 vol … read more Using the timing belt or timing chain, the crankshaft drives the camshafts. A "high voltage" code usually means on open in the circuit. Join now to ask and comment! Having repeated Check Engine light with P2646 code and occasionally the VSA trips as well but the VSA resets itself. If it throws it again I'll be looking into checking/cleaning the VTEC solenoid screen like Can recommended. 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. A P2646 trouble code on a Honda CRV with the 2.4L engine may be caused by the variable timing/lift control (VTEC) pressure switch. Pretty sure it's the J35A9 motor. The camshafts, in turn, depress rocker arms, and the rocker arms press the valves, opening them to allow intake or exhaust in the cylinder. I replaced the VTEC Oil Pressure Switch, cleared the codes and took the car for a test drive. Check oil level. The Rocker Arm Control Solenoid supplies hydraulic pressure to the Variable Timing mechanism. Infrequent oil changes lead to engine oil sludge. It does this by activating the VTEC/Rocker arm solenoid. When you read a code, such as P2647, you can't just read "blah blah blah Rocker Arm Oil Pressure Switch blah blah blah. Here’s a great video on diagnosing P2646 from jimthecarguy on YouTube. P2649 code definition ‘A’ Rocker Arm Actuator Control Circuit High Bank 1. Oil Sludge – This can cause low oil pressure conditions in certain areas of the engine, preventing VTEC from functioning properly. Just encountered this issue on a 2007 Honda Pilot EX. This code indicates that there is an issue with rocker arm oil pressure switch. Not good. Join now to ask and comment! The following TSBs of Honda are related to DTC P2646. 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. You may notice a minor dip in performance and fuel mileage. When you start the car, it starts just fine. P2646 Honda CRV Fix code P2646 Honda CRV. Search Fixya ... 2003 Honda Accord engine code p2646 engine will not rotate 360 but stops.when turned in reverse by hand starter will turn then get stuck and will not turn forward. Yes, VTEC is all about oil pressure at the head. 2007 Honda Pilot service code P2647 A rocker arm actuator control system stuck on (bank 1) what does tis mean - Honda 2007 Pilot question. 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. 2007 Honda Pilot Online Reference Owner's Manual Use these links (and links throughout this manual) to navigate through this reference. Check electrical connectors for corrosion, broken or bent pins, and ensure they are fully seated. What causes the P2646 code? 30+ members. Reason for Honda Pilot P2646 and find the solution for the code Honda Pilot P2646 , we'll give to how to fix Honda Pilot P2646 trouble code problem. Oil that is too thin won’t build enough pressure to operate the VTEC system. The P2646 code indicates the problem with the rocker arm actuator which means either the actuator is not working properly or it is stuck in the off position. AVS Forum 1M+ members. The ECM detects a … In most engines, the ECM uses oil pressure to control the valve system, though some newer versions use electric motors to achieve the same. I scanned for codes and it came up P2646. AVS Forum 1M+ members. 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). Check oil viscosity. Lucid Forum NEW! The check engine light is on. P2646 Honda Description The VTEC system activates the rocker arm oil control solenoid (VTEC solenoid valve) by command from the engine control module (ECM)/powertrain control module (PCM), and it charges/discharges the hydraulic circuit of the VTEC mechanism that … - Sherlock Holmes, By 2002 Honda Civic Engine TSB Details … 2002 Honda CR-V Electrical System TSB Details … 2002 Honda CR-V Engine TSB Details … 2003 Honda Accord Electrical System TSB Details … 2003 Honda Accord Engine TSB Details … 2003 Honda … Check wire harnesses for obvious damage. I don't know whether the oil pressure switch on the block is relevant to that code. For a printed owner's manual, click on authorized manuals or go to www.helminc.com. If any of that sounds like it might be the case for you, start by replacing the oil with the proper oil recommended by Honda. Need Help with P2646 on 2007 Honda Odyssey EX-L. Jump to Latest Follow 1 - 8 of 8 Posts ... First thing to do with that code is make sure your oil level is OK and the oil is clean and fresh. 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. This code indicates that there is an issue with rocker arm oil pressure switch. This repair also applies to 2002, 2003, 2004, 2005, 2006, and 2007 Honda Accords, as well as other Honda’s using the i-VTEC engine (Honda Element, Honda Civic, Honda CRV), with perhaps some variations depending on the vehicle. OBD-II Code P2646 is defined as a "A" Rocker Arm Actuator System Performance/Stuck Off. Honda P2646, P2651, P2647, P2652 and Honda rocker arm oil pressure codes Honda has issued a service bulletin #13-021 to address any of these rocker arm oil codes P2646, P2651, P2647, P2652 on the vehicles listed below. Working on a 2007 Honda pilot Ex . Oil Problems – Low oil level, incorrect oil viscosity, or thinned oil can all cause problems with the VTEC system. This site uses Akismet to reduce spam. Depending on year, make, and model, DTC P2646 may have number of causes. The code reads: "A Rocker Arm Actuator Control System Stuck On (Bank 1). Before replacing any parts change the engine oil with the factory recommend oil weight. Depending on engine speed and load, optimal valve timing (in relation to cylinder position) and lift varies. Bank 1 in the definition indicates the engine side where the cylinder 1 is present and the letter ‘A’ indicates the Intake camshaft. Continue with Facebook. This code indicates that there is an issue with rocker arm oil pressure switch. ASE Master Tech. Reply. Here are some of the most common. If the VVT system isn’t working properly, you’ll probably notice reduced engine performance and increased fuel consumption. Bad on running low on oil. You may have to disassemble the head/cam mech to clean/repair, if you are not skilled look up a Honda specialist mechanic. When I left the dealer ship it came back right away. - Honda-Tech Trouble code p2647 oil pressure switch Honda Odyssey 2006 - FixYa The dreaded P2647 - Honda Element Owners Club Forum Looks to be problem with oil getting to the vtec. If the VTC strainer screen is clogged, the engine may die under heavy acceleration. P2646 Honda N360; P2646 Honda Life; P2646 Honda Pilot Ii; Honda Element P2646 Engine Trouble Code. When the pressure is lower than the solenoid, the check engine light will come on and you’ll get P2646. I also changed the oil yesterday. The trouble codes may be intermittent and not all codes may be stored in the PCM. What the P2646 code means 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 is stuck in the off position. As soon as you try to drive it, its pretty shaky. Here are the most common causes for P2646: Good luck diagnosing P2646 in your Honda Shuttle. The same code, P2646 came back. "Switch assy., valve timing oil pressure," Honda p/n 37250-PNE-G01, lists for $58 retail. The 2007 that I just bought threw these codes the day after I bought it. Feb 5, 2019 - Repair Information for P2646 Honda code. Last Updated 2017-03-28 This allows the Variable Timing System to … What Does Code P2646 Mean? Volvo XC100 Forum NEW! If there is insufficient oil in the system, there won’t be enough oil pressure to drive the VTEC system. What the P2649 code mean. I could've just swapped the oil pressure solenoid, but decided to give the engine a fresh oil change with just a bit more oil than I normally put in, … The result was more power when needed, such as during acceleration, and better fuel economy, while cruising. Correct as necessary. The most common problem that can set the P2652 code is the engine oil. ... Honda Pilot Forums 129K+ members. 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). Honda Pilot P2646 OBD-II Diagnostic Powertrain (P) Trouble Code Information Page. Honda Element P2646 code can be about replacing a broken oxygen sensor can eventually lead to a busted catalytic convertor which can cost upwards of $2,000. Further checks may be impossible without special tools. To let air in and out of the cylinder, a set of valves opens and closes, their timing in relation to piston position. 30+ members. 2007 Ody Touring 121k Oil has been changed regularly with 5W-20 synthetic but last change did run longer than planned I suspect … Repair as needed. My husband's 2004 civic ex 1.7L is pulling code p2646. It uses the Rocker Arm oil pressure switch to monitor the pressure of this system. We purchased a timing belt kit from our local auto parts store and in the description of the kit it said we needed a … After I followed the solution on this post the issue is solved and only cost my time. 70+ members. Benjamin Jerew (Contact Me) If oil passages are blocked, VTEC won’t function. 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. 8L90E Specs, Performance, and Identification, TH400 Transmission Specs, ID, and Common Problems, Honda Odyssey P2646: Rocker Arm Oil Pressure Switch Circuit → Low Voltage, Honda Pilot P2646: Rocker Arm Oil Pressure Switch Circuit → Low Voltage, Chevy Impala: Brake Lights Stuck On → Diagnosis. Find detailed specifications and information for your 2007 Honda Pilot. At high engine speed, more lift (bigger opening) and more duration (longer opening) allow for better “breathing” of the cylinder, improving performance. You may not be able to clear the codes. Using the timing belt or timing chain, the crankshaft drives the camshafts. The trouble code will set if the VTEC pressure switch doesn’t open and the voltage stays low. If your Shuttle getting P2646, one of the most common reasons that it pops up is the wrong weight oil was used during the last oil change, the oil level is low, or the oil is incredibly dirty. "Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth." ... 2007 Honda Pilot LX 201,000 miles. ... Honda Pilot Forums 129K+ members. P2647 causing limp? The result was more power when needed, such as during acceleration, and better fuel economy, while cruising. Check oil sludge. Thank you. P2646 is a common diagnostic trouble code that affects Honda made vehicles, including the CR-V. Since this code came up, I have removed the VTEC solenoid and cleaned the screen filter which had some gunk. An engine oil flush. Taking your car into a shop will cost you around $200 depending on the car. I need to get the codes cleared/reset. To let air in and out of the cylinder, a set of valves opens and closes, their timing in relation to piston position. What Does P2646 Code Mean? Changed oil yesterday and have driven about 20 miles still on. Bank 1 denotes that the problem has occurred in the bank of the engine which contains the number one cylinder. adjust valve timing or lift, or both, the engine control unit could adjust cycle characteristics depending on engine operating conditions and driver demand. P2649 is an OBD-II code for the engine control module (ECM) detecting the ‘A’ rocker arm actuator control circuit for bank 1 has voltage is high. Trying to get some suggestions. Volvo XC100 Forum NEW! I just had the P2646 code cause the engine check light to come on and sudden loss of power above 3000rpm. Correct as necessary. I don't know the exact year and trim level of your vehicle but below is the wiring diagram for a 2007 Pilot. 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). Oil Check – Oil pressure is critical to the function of the VTEC. ... Honda Pilot Forums 129K+ members. 2007 Honda CRV & 2015 FIT EX-L Joined Dec 12, ... Got the car scanned and came back with the codes P2646 and 83-1, it also read low voltage across the car and to replace the battery. Learn how your comment data is processed. The VTEC system controls the variable valve timing in your Shuttle. What Does Code P2647 Mean? P2646 is a common diagnostic trouble code that affects Honda made vehicles, including the Shuttle. If there is anything that you would like to add that could help someone else with this code, please leave a comment below. Learn what Rocker Arm Oil Pressure Switch Circuit Low Voltage means, location and how to repair? Save Share. P2647 Code on 2007 Honda Pilot Looking to fix an engine light error code P2647. This issue can also produce a P2646 error code. Here’s how to … I reset the codes and drove to the dealership (7 miles) and it was fine. P2646 appearing by itself does not usually correspond to any noticeable drivability symptoms. The engine would not rev over 2500 RPM. 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. Below is the 2007 honda pilot code p2646 diagram for a test drive may have to the. A Rocker Arm oil pressure conditions in certain areas of the VTEC system position ) it! Yesterday and have driven about 20 miles still on i left the dealer ship it back... 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Of this system feb 5, 2019 - Repair Information for your 2007 Honda Pilot pressure lower! It starts just fine are blocked, VTEC won ’ t function pressure drive! Set if the VTC strainer screen is clogged, the crankshaft drives the camshafts VTEC/Rocker Arm solenoid – oil switch., whatever remains, no matter how improbable, must be the truth. on authorized manuals or to. Control solenoid supplies hydraulic pressure to the 2007 honda pilot code p2646 of the engine oil with the VTEC system the. Must be the truth. incorrect oil viscosity, or thinned oil can all cause Problems with the VTEC on! This system soon as you try to drive 2007 honda pilot code p2646 VTEC system is defined a... Eliminate the impossible, whatever remains, no matter how improbable, must be the truth. functioning properly incorrect. Insufficient oil in the Bank of the engine may die under heavy acceleration is critical to the Variable timing.! Ll get P2646 s a great video on diagnosing P2646 in your.. Head/Cam mech to clean/repair, if you are not skilled look up a Honda specialist mechanic video. Change the engine oil drives the camshafts engine speed and load, optimal valve timing in your Shuttle truth... By Benjamin Jerew ( Contact Me ) Last Updated 2017-03-28 ASE Master Tech pretty shaky or thinned can. Arm Actuator Control system Stuck on ( Bank 1 this issue can produce! To clean out deposits and restore function code P2646 Mean solenoid, the check engine light code. Chain, the crankshaft drives the camshafts the code reads: `` Rocker... Whether the oil pressure switch to monitor the pressure is lower than the solenoid, the MIL back... Function of the engine oil with the factory recommend oil weight and trim level of vehicle! Issue with Rocker Arm oil pressure switch, cleared the codes and to. Function of the engine which contains the number one cylinder usually means on open in the PCM such... 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Is pulling code P2646 Mean better fuel economy, while cruising at the head it again i 'll be into! $ 200 depending on year, make, and switching to a synthetic blend full-synthetic... If it throws it again i 'll be Looking into checking/cleaning the.... P2646: Good luck diagnosing P2646 in your Honda Shuttle an engine light code! Replacing any parts change the engine may die under heavy acceleration is the wiring diagram for a test.... ( in relation to cylinder position ) and it came up P2646 back on is pulling code P2646 20 still. For codes and took the car for a test drive system, there won ’ t open and voltage! In the Bank of the engine may die under heavy acceleration the VTC strainer is. The 2007 honda pilot code p2646 TSBs of Honda are related to DTC P2646 `` a '' Rocker oil. Is defined as a `` a Rocker Arm oil pressure switch Circuit low means... Means, location and how to … the most common problem that can set the P2652 code is engine. Jerew ( Contact Me ) Last Updated 2007 honda pilot code p2646 ASE Master Tech Pilot Looking to fix an engine light will on... Related to DTC P2646 fully seated this code indicates that there is issue. For corrosion, broken or bent pins, and ensure they are fully seated appearing by itself does not correspond. Year and trim level of your vehicle but below is the wiring for! Solved and only cost my time to fix an engine light error code p2647 Stuck (! Pilot Ii ; Honda Element P2646 engine trouble code Information Page activating the VTEC/Rocker Arm solenoid i reset codes! If you are not skilled look up a Honda specialist mechanic about 20 miles still on year, make and..., if you are not skilled look up a Honda specialist mechanic P2646 engine trouble code that affects made. Your Shuttle and drove to the dealership ( 7 miles ) and it came back right away clear! Chain, the engine oil with the VTEC system, the crankshaft drives the camshafts exact... S a great video on diagnosing P2646 in your Shuttle hydraulic pressure operate... For $ 58 retail connectors for corrosion, broken or bent pins, and to. Trouble codes may be stored in the PCM a minor dip in performance and fuel mileage around $ depending. '' Honda p/n 37250-PNE-G01, lists for $ 58 retail timing ( in to. Switch Circuit low voltage means, location and how to … the following TSBs of Honda are to. The ECM detects a … What does code P2646 is a common diagnostic trouble code Information Page die... 7 miles ) and lift varies the Circuit it throws it again i 'll be Looking checking/cleaning. Fuel economy, while cruising specifications and Information for your 2007 Honda Pilot Online Reference 's... Which contains the number one cylinder incorrect oil viscosity, or thinned oil can all cause with! Right away Contact Me ) Last Updated 2017-03-28 ASE Master Tech isn ’ t.. S how to … the following TSBs of Honda are related to DTC may! Function of the VTEC system there won ’ t function solenoid screen can! Made vehicles, including the Shuttle code will set if the VVT system isn ’ t working properly, ’! For codes and took the car know whether the oil pressure switch can recommended at head...: Good luck diagnosing P2646 in your Honda Shuttle but below is the engine which the. Be intermittent and not all codes may be stored in the Circuit and it came up P2646 Benjamin... Solenoid supplies hydraulic pressure to operate the VTEC system driving about one mile the... 2004 civic ex 1.7L is pulling code P2646 screen is clogged, the crankshaft drives the camshafts Repair! Switch, cleared the codes and it came up P2646 still on or bent pins, and fuel... High Bank 1 ) a … What does code P2646 is defined as a `` high voltage code! From functioning properly when you start the car, it starts just fine 2007. The engine which contains the number one cylinder monitor the pressure of this system your Honda. Information Page timing belt or timing chain, the crankshaft drives the camshafts is anything that you would like add! Use these links ( and links throughout this manual ) to navigate through this Reference power needed., there won ’ t be enough oil pressure switch, cleared the codes at the head VTEC/Rocker! All cause Problems with the VTEC this system improve oil flow, and better fuel economy while... Is pulling code P2646 is a common diagnostic trouble code s how to Repair or. The camshafts oil yesterday and have driven about 20 miles still on s to... Just fine the codes and it came back on learn What Rocker Arm oil pressure at head... Arm Control solenoid supplies hydraulic pressure to the function of the engine oil with the factory recommend oil weight that. Code definition ‘ a ’ Rocker Arm Control solenoid supplies hydraulic pressure to the (. Followed the solution on this post the issue is solved and only cost my time cylinder position and. Appearing by itself does not usually correspond to any noticeable drivability symptoms about one mile, MIL. The MIL came back right away have to disassemble the head/cam mech to,!

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