P0012 OBD Code Definition:
P0012 A Camshaft Position Timing Over Retarded Bank 1
P0012 OBD Code Description:

OBD Code P0012

“A” Camshaft Position – Timing Over-Retarded

What’s mean?

OBD2 Code P0012 Definition:
A code P0012 Definition:the VVT (variable valve timing) or VCT (variable camshaft timing) components and the car’s PCM (powertrain control module, also called an ECM). That consists of a few different components but the P0012 DTC specifically Definition:the camshaft (cam) timing. In this case, if the cam timing is over-retarded, the engine light will be illluminated and the code will be set. The “A” camshaft is either the intake, left, or front camshaft.


Possible sumptoms of P0012
Most likely a P0012 DTC will result in one of the following: P0012 hard starting poor idle and/or stalling There are potentially other symptoms as well. Of course, when trouble codes are set, the MIL (malfunction indicator lamp, a.k.a. the check engine light) illuminates.

Possible Causes

Possible causes of P0012
A P0012 DTC trouble code may be caused by one or more of the following: Incorrect camshaft timing Wiring problems (harness/wiring) in intake timing control valve control solenoid system Continuous oil flow to VCT piston chamber Failed timing valve control solenoid (stuck open)

Possible Solutions

The main thing to check is to verify the operation of the VCT solenoid. You’re looking for a sticking or stuck VCt solenoid valve caused by contamination. Refer to vehicle specific repair manual to perform component tests for the VCT unit. Notes: Dealer techs have advanced tools and the ability to follow detailed troubleshooting steps, including the ability to test components using a scan tool.

OBD-II Codes

P0010 P0011 P0020 P0021 P0022

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