Codes on engine light
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Joined: Feb 2018
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Codes on engine light
Had my engine light come on and got it read, the codes are
1: C121A steering angle sensor not initialized, this one I can fix and understand what the problem is.
2: U1402 implausible engine temperature signal revived, not sure about this one can’t find a clear understanding on it.
3: p0456 evaporative emission system, this one I will first replace the gas cap and go from there.
the second one is the one I am worried about more if anyone can help me out in it would be appreciated.
1: C121A steering angle sensor not initialized, this one I can fix and understand what the problem is.
2: U1402 implausible engine temperature signal revived, not sure about this one can’t find a clear understanding on it.
3: p0456 evaporative emission system, this one I will first replace the gas cap and go from there.
the second one is the one I am worried about more if anyone can help me out in it would be appreciated.
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Joined: Apr 2010
Posts: 87,267
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From: Clayton MI
PCM is telling you it doesn't believe what the Engine Coolant temp sensor is telling it. The reading is either too cold, after the engine has been running for a time, or too hot..... best bet is to plug in with a scan tool that can read data, and see what the temp sensor is telling the PCM. Might be a wiring problem, or, just a bad sensor.