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I have p0011 code where should I start for trouble shooting? It just had the oil changed and has a full tank of gas it came on about 20 miles after I filled ip

Vehicle: 2004 scion xb 1.4

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You can reset the light and see if it comes back. If it does you can check the timing of the engine.

I've read something about the cam timing gear is made of plastic and can develop cracks in it, or the timing chain will skip a tooth.

 

Possible causes:

- Dirty Oil
- Variable Valve Timing (VVT) circuit is open or shorted
- Oil Control Valve (OCV) circuit is open or shorted
- Faulty variable valve timing (VVT)
- Faulty oil control valve (OCV)
- Damaged ECM 

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