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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. What is possible causes? Locked?

Son couldn't get started so kept cranking he said oil was at the bottom of stick. Put oil in the engine then this is what I got no full rotation. I changed oil pressure switch. Same results.

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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
with rocker arm problems , to stop rotation it may be bottoming out on a valve spring and not letting the cam shaft turn .
talk with a shop for a proper diagnosis and quote

Posted on Dec 22, 2016

  • Stephen Chitman
    Stephen Chitman Dec 22, 2016

    Can timing be set by me or. Is this very difficult?

  • Bill Boyd Dec 22, 2016

    unless you have broken a belt or chain I doubt that the timing will be out
    if you have no experience then let the professionals do it
    however from the code it is not timing but the actuator on the rockers
    as I said talk with a service center for a proper diagnosis



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Error code P0722 and P2646. Can these be related? The transmission also slams into drive in the morning, but is fine after it warms up.

Not related, first is a transmission output speed sensor code, check the connector, it's probably the reason you have slamming when it s cold.
second code is for low vtec oil pressure, usually caused by low engine oil or dirty/wrong viscosity oil being used.

Mar 10, 2014 | 2003 Honda Accord

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I have a 2003 Honda accord that will not start! Tried to jump battery..all fans and belts were running however car would not turn over...bought a new battery and replaced with old now my car want do a

I have seen issues like this on other Honda's and the problem turned out to be the ignition starter switch. Do this, jumper power directly to the starter solenoid trigger wire and see if the engine cranks.

Jun 30, 2017 | 2003 Honda Accord

1 Answer

Honda accord

honda accord code p2646=

rocker arm actuatar system performance or stuck off

Aug 17, 2012 | Honda Accord Cars & Trucks

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Does adding oil fix the p1009 code

Low oil or wrong oil will cause issues with the variable valve timing solenoid as it is a hydrolic valve that used the oil to work when commanded.

Jun 26, 2012 | 2003 Honda Accord

1 Answer

2004 honda accord ex 4.2. check engine come on. code is p2646. what is it and how do i fix it?

p2646 vtec oil pressure switch circuit low voltage - check wiring or change sensor

Jan 05, 2012 | 2004 Honda Accord

1 Answer

What does code p2646 code mean on my honda element

try this link, i tried to list them but their were to many P2646 VTEC Oil Pressure Switch Circuit Low Voltage


May 06, 2011 | 2003 Honda Element

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How to replace starter on 2003 honda accord

I'm assuming you have the 2.4 Liter engine. If not, please get back to me. I will paste instructions from below, but recommend you also read thru my post at and let me know if you have questions.

2.4L Engines
3.0L Engines

NOTE The factory sound system has a coded theft protection system. It is recommended that you know your reset code before you begin.

Remove or disconnect the following:

Negative then the positive battery cables Automatic Transmission Fluid (ATF) cooler Starter cable from terminal B located on the back of the solenoid Black/white wire from the S (solenoid) terminal Two bolts that mount the starter to the transaxle assembly Starter
To install:

  1. Install in the reverse order of removal.
NOTE When installing the heavy gauge starter cable, make sure the crimped side of the terminal end is facing out.

  1. Enter the anti-theft code and radio presets.

Nov 01, 2010 | 2004 Honda Accord

1 Answer

Car would not start or the engine wouldn?t even turn over.

Try removing spark plugs and turning engine over by hand with socket wrench on harmonic dampner if it spins freely probably not engine problem fluid in cylinders will cause hydro lock indicating blown head gasket or injector stuck wide open. a broken timing belt would still allow engine to turn over as your car should not have an interference engine. If engine will not turn by hand with spark plugs out susspect internal engine damage siezed bearings broken rod and so.

Oct 16, 2008 | 1992 Honda Accord

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