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p2646 honda civic ex 2005

I have a 2007 Honda civic Coupe ex m/t. Checked oil and it was pretty much empty. What are the common causes of code P2646? Changed oil/filter cleared code ran and revved fine while not on road. "YourMechanic will fix your car at your garage at a fixed hourly rate much lower than their brick-and-mortar counterparts." once on road will work for a bit then throw code again.

I cannot thank you enough for your help. Code P2646 is not a very common code since most vehicles do not have actuators for the rocker arms of the engines they manufacture.

At first I thought he might have a transmission problem but after checking everything seemed fine. After he worked on my vehicle, it ran and sound much better. Correct as necessary.Check oil sludge. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. "Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth." Sensor changed. Your response was received in less than 10 minutes!! A 2005 Honda Civic is worth between $809 and $3,065 depending on configuration, mileage and condition. At high engine speed, more lift (bigger opening) and more duration (longer opening) allow for better “breathing” of the cylinder, improving performance. The result was more power when needed, such as during acceleration, and better fuel economy, while cruising.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 replaced both vtec selinoid and pressure switch. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. Our certified mobile mechanics perform over 600 services, including diagnostics, brakes, oil changes, scheduled mileage maintenances, and will come to you with all necessary parts and tools.

Dealer wanted $87 for an hour of labor and even I did it in 15 minutes. Successful Repair for DTC P2646 On Christmas day my son was driving his 2005 Honda Element up a mountain road when the MIL came on. Infrequent oil changes lead to engine oil sludge. Have replaced Vtec solenoid assembly including pressure switch. SOURCE: Honda Service News. Correct as necessary.Check oil viscosity. I got a code back for a 04 Honda accord ex that says P2646 Rocker Arm Actuator Control System Performance /stuck off / (bank 1) Where can I purchase one and what exactly is my problem. This could be due to bad spark plugs or ignition coils as well as other sensor on the engine reading incorrectly. 2003-2012 Honda Accord L4 2002-2005 Honda Civic Si 2002-2009 Honda CR-V 2011 Honda CR-Z 2003-2011 Honda Element 2007-2011 Honda Fit The factory bulletin suggests that replacing the VTEC oil pressure switch (P/N 37250-PNE-G01, H/C 6737217) take care of the problem. The flashing Check Engine Light tells me that the engine is having a misfire condition occurring.

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. - Sherlock HolmesTo let air in and out of the cylinder, a set of valves opens and closes, their timing in relation to piston position. If there is insufficient oil in the system, there won’t be enough oil pressure to drive the VTEC system. If there is insufficient oil in the system, there won’t be enough oil pressure to drive the VTEC system.

Here are some of the most common. The VTEC oil switch is normally closed, and grounds the reference voltage from the Engine Control Module (ECM) on the Blue/Black (BLU/BLK) wire. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. He was friendly, courteous and knowledgeable of his trade. The vehicles that have variable rockers that use this code are known to get this code when the engine gets sludged up from lack of oil changes at the proper interval, or if the oil is too thick of a viscosity and does not flow properly through the small passages as required. You are definitely on my list for future help. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc. Here are some of the most common. They really helped put my nerves at ease. The car wont rev pass 4k rpm.

If oil passages are blocked, VTEC won’t function. Unfortunately, without diagnosing the car using a scanning tool to download any potential trouble codes there is no way to tell what other codes may be causing this light to come on. My check engine light came on when driving on the interstate. P0344 HONDA Description The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. "Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth." Next step? Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.Over 25,000 topics, from beginner tips to technical guidesCheck cars for recalls, common issues & maintenance costsOur mechanics make house calls in over 2,000 citiesExplore nationwide job opportunities for automotive techniciansTrusted mechanics, rated by thousands of happy car ownersJaguar S-Type - Check Engine Light is on - Pearland, TexasI was very impressed with John.

Have 2005 civic ex 1.7L Throwing P2646 code. If oil passages are blocked, VTEC won’t function. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc. Wisconsin certified emissions state inspectorDisclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. The camshafts, in turn, depress rocker arms, and the rocker arms press the valves, opening them to allow intake or exhaust in the cylinder.Depending on engine speed and load, optimal valve timing (in relation to cylinder position) and lift varies.

Oil that is too thin won’t build enough pressure to operate the VTEC system. Oil that is too thin won’t build enough pressure to operate the VTEC system.

Check wire harnesses for obvious damage.

Couldn't have asked for more.

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