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Well here we go again a new problem has arisen in my dads 2004 sienna.
it now is throwing a P0012 code for something in the camshaft timing. im not sure if its a problem but the van seems to be running fine with no issues in acceleration or idle. I do relize it has been 70K or more since spark plugs were last put in so if anyone has any knowledge that this may be the issue im hoping it is but its lasted 170k+ miles my dad is planning to keep it for another year or more cause the resale value on it is $1,500
it is due for emmisions and the engine light was reset yesterday only to have it come on right before the emissions test was taken so it failed the test.
Any help would be great.
Also I have some mods I want to do on my corolla now that I am working at jiffy lube and making good $$$
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That consists of a few different components but the P0012 DTC specifically refers to 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.Most likely a P0012 DTC will result in one of the following: 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.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)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.
source chilton .
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