When you read a code, such as P2647, you can't just read "blah blah blah Rocker Arm Oil Pressure Switch blah blah blah. Check oil viscosity. Was told to get an oil change to see if that helped, it didn't. Here’s how to … AVS Forum 1M+ members. Benjamin Jerew (Contact Me) As soon as you try to drive it, its pretty shaky. Feb 5, 2019 - Repair Information for P2646 Honda code. If there is insufficient oil in the system, there won’t be enough oil pressure to drive the VTEC system. "Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth." 2007 Ody Touring 121k Oil has been changed regularly with 5W-20 synthetic but last change did run longer than planned I suspect … Correct as necessary. 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. 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 … After I followed the solution on this post the issue is solved and only cost my time. Continue with Facebook. Find detailed specifications and information for your 2007 Honda Pilot. P2647 causing limp? Oil Problems – Low oil level, incorrect oil viscosity, or thinned oil can all cause problems with the VTEC system. 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 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. 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. This allows the Variable Timing System to … The VTEC system controls the variable valve timing in your Shuttle. Check oil level. Honda Pilot P2646 OBD-II Diagnostic Powertrain (P) Trouble Code Information Page. I replaced the VTEC Oil Pressure Switch, cleared the codes and took the car for a test drive. The engine would not rev over 2500 RPM. If it throws it again I'll be looking into checking/cleaning the VTEC solenoid screen like Can recommended. 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. 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. Here are some of the most common. Depending on year, make, and model, DTC P2646 may have number of causes. You may have to disassemble the head/cam mech to clean/repair, if you are not skilled look up a Honda specialist mechanic. Volvo XC100 Forum NEW! If the VTC strainer screen is clogged, the engine may die under heavy acceleration. This issue can also produce a P2646 error code. Thank you. Do an oil/filter change. I … I just had the P2646 code cause the engine check light to come on and sudden loss of power above 3000rpm. The 2007 that I just bought threw these codes the day after I bought it. It does this by activating the VTEC/Rocker arm solenoid. 30+ members. I don't know whether the oil pressure switch on the block is relevant to that code. I also changed the oil yesterday. The code reads: "A Rocker Arm Actuator Control System Stuck On (Bank 1). Learn what Rocker Arm Oil Pressure Switch Circuit Low Voltage means, location and how to repair? P2649 code definition ‘A’ Rocker Arm Actuator Control Circuit High Bank 1. Just encountered this issue on a 2007 Honda Pilot EX. 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. Save Share. We purchased a timing belt kit from our local auto parts store and in the description of the kit it said we needed a … This code indicates that there is an issue with rocker arm oil pressure switch. Bad on running low on oil. 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. In most engines, the ECM uses oil pressure to control the valve system, though some newer versions use electric motors to achieve the same. Yes, VTEC is all about oil pressure at the head. The most common problem that can set the P2652 code is the engine oil. To let air in and out of the cylinder, a set of valves opens and closes, their timing in relation to piston position. ASE Master Tech. The trouble codes may be intermittent and not all codes may be stored in the PCM. adjust valve timing or lift, or both, the engine control unit could adjust cycle characteristics depending on engine operating conditions and driver demand. Bank 1 in the definition indicates the engine side where the cylinder 1 is present and the letter ‘A’ indicates the Intake camshaft. Lucid Forum NEW! 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. What Does P2646 Code Mean? - 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. Oil Sludge – This can cause low oil pressure conditions in certain areas of the engine, preventing VTEC from functioning properly. What Does Code P2647 Mean? Oil that is too thin won’t build enough pressure to operate the VTEC system. Changed oil yesterday and have driven about 20 miles still on. 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. 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. 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. Working on a 2007 Honda pilot Ex . This site uses Akismet to reduce spam. Last Updated 2017-03-28 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). Having repeated Check Engine light with P2646 code and occasionally the VSA trips as well but the VSA resets itself. When I left the dealer ship it came back right away. 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. Join now to ask and comment! 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. For a printed owner's manual, click on authorized manuals or go to www.helminc.com. 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. What Does Code P2646 Mean? ... Honda Pilot Forums 129K+ members. The result was more power when needed, such as during acceleration, and better fuel economy, while cruising. If the VVT system isn’t working properly, you’ll probably notice reduced engine performance and increased fuel consumption. The check engine light is on. Oil Check – Oil pressure is critical to the function of the VTEC. Check wire harnesses for obvious damage. 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. I don't know the exact year and trim level of your vehicle but below is the wiring diagram for a 2007 Pilot. Further checks may be impossible without special tools. 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. You may not be able to clear the codes. 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). 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. P2646 is a common diagnostic trouble code that affects Honda made vehicles, including the Shuttle. The trouble code will set if the VTEC pressure switch doesn’t open and the voltage stays low. To let air in and out of the cylinder, a set of valves opens and closes, their timing in relation to piston position. I need to get the codes cleared/reset. If there is anything that you would like to add that could help someone else with this code, please leave a comment below. 70+ members. 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. Since this code came up, I have removed the VTEC solenoid and cleaned the screen filter which had some gunk. 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, … This code indicates that there is an issue with rocker arm oil pressure switch. 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. Taking your car into a shop will cost you around $200 depending on the car. The ECM detects a … 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 … The camshafts, in turn, depress rocker arms, and the rocker arms press the valves, opening them to allow intake or exhaust in the cylinder. Volvo XC100 Forum NEW! Correct as necessary. Trying to get some suggestions. AVS Forum 1M+ members. I scanned for codes and it came up P2646. Pretty sure it's the J35A9 motor. 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). What is possible causes? You may notice a minor dip in performance and fuel mileage. 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. 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. 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. P2646 appearing by itself does not usually correspond to any noticeable drivability symptoms. An engine oil flush. Here are the most common causes for P2646: Good luck diagnosing P2646 in your Honda Shuttle. If oil passages are blocked, VTEC won’t function. Reply. P2646 Honda N360; P2646 Honda Life; P2646 Honda Pilot Ii; Honda Element P2646 Engine Trouble Code. The result was more power when needed, such as during acceleration, and better fuel economy, while cruising. 2007 Honda Pilot Online Reference Owner's Manual Use these links (and links throughout this manual) to navigate through this reference. It uses the Rocker Arm oil pressure switch to monitor the pressure of this system. ... 2007 Honda Pilot LX 201,000 miles. ... Honda Pilot Forums 129K+ members. improve oil flow, and switching to a synthetic blend or full-synthetic oil may help to clean out deposits and restore function. What the P2649 code mean. Using the timing belt or timing chain, the crankshaft drives the camshafts. This code indicates that there is an issue with rocker arm oil pressure switch. The same code, P2646 came back. A "high voltage" code usually means on open in the circuit. P2646 Honda CRV Fix code P2646 Honda CRV. 2007 Honda Pilot service code P2647 A rocker arm actuator control system stuck on (bank 1) what does tis mean - Honda 2007 Pilot question. The following TSBs of Honda are related to DTC P2646. At high engine speed, more lift (bigger opening) and more duration (longer opening) allow for better “breathing” of the cylinder, improving performance. OBD-II Code P2646 is defined as a "A" Rocker Arm Actuator System Performance/Stuck Off. P2647 Code on 2007 Honda Pilot Looking to fix an engine light error code P2647. My husband's 2004 civic ex 1.7L is pulling code p2646. 30+ members. Not good. Repair as needed. The Rocker Arm Control Solenoid supplies hydraulic pressure to the Variable Timing mechanism. Join now to ask and comment! Using the timing belt or timing chain, the crankshaft drives the camshafts. When you start the car, it starts just fine. Here’s a great video on diagnosing P2646 from jimthecarguy on YouTube. Check electrical connectors for corrosion, broken or bent pins, and ensure they are fully seated. P2646 is a common diagnostic trouble code that affects Honda made vehicles, including the Shuttle. After driving about one mile, the MIL came back on. "Switch assy., valve timing oil pressure," Honda p/n 37250-PNE-G01, lists for $58 retail. ... Honda Pilot Forums 129K+ members. When the pressure is lower than the solenoid, the check engine light will come on and you’ll get P2646. Infrequent oil changes lead to engine oil sludge. What causes the P2646 code? Bank 1 denotes that the problem has occurred in the bank of the engine which contains the number one cylinder. P2646 is a common diagnostic trouble code that affects Honda made vehicles, including the CR-V. I reset the codes and drove to the dealership (7 miles) and it was fine. - Sherlock Holmes, By Check oil sludge. 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