This bulletin applies to the 2008-2012 Honda Accord V6 equipped with an automatic transmission. If DTC P3400 (VPS stuck off bank 1) and/or P3497 (VPS stuck off bank 2) is set, check engine oil level, as low oil pressure can set these codes.
If the oil level is low, adjust or replace oil as needed. If the oil level is OK, clear the DTC(s) and turn the ignition switch to ON without starting the engine (key on, engine off).
If the DTC(s) return, there is likely a problem in the rocker arm oil pressure switch circuit.
Unplug the rear rocker arm oil pressure switch 1P connector for DTC P3400, or the front rocker arm oil pressure switch 1P connector for DTC P3497. Go to the PGM-Fl Data List and check the rocker arm oil pressure switch signal.
If the switch signal reads OFF, the wiring is OK. Replace the oil pressure switch. Then plug in the connector and verify that the DTC(s) are no longer present.
If the switch signal reads ON, there is a problem in the wiring or the PCM. Continue with the normal DTC troubleshooting in ISIS.
If the DTC(s) do not return, start the engine and let it idle for one minute. If the DTC(s) return, the rocker arm oil control valve is leaking or stuck. Replace the rear rocker arm oil control valve for DTC P3400 or the front rocker arm oil control valve for DTC P3497.
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