Codes on engine light
#1
02-10-2018, 04:22 PM
Join Date: 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.
#2
02-11-2018, 09:59 AM
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.
