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Old 07-09-2006, 02:10 PM
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2001 Nissan Altima GXE...DTC P1126

On a 2001 Nissan Altima GXE, the diagnostic code P1126 has appeared several times. No obvious drivability/performance problems were noted.

From on-line OBD-II codes for Nissan this would appear to be "Thermostat Function". Not having the manual, can anyone tell me what sets this code and what the likely malfunction may be.

Any hints on sensors to check and how the circuit functions would be greatly appreciated.


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Old 07-09-2006, 03:13 PM
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well if it's thermostat function your engine would run hot or too cold, by the temp gauge. however with my code reader, I got an OBDII lookup program, and I looked under global OBDII instead of the manufacture and I got manufacturer control fuel air metering which could be somthing along the lines of a bad or mis reading O2 sensor causing mixtures to go off but, when I put it into a 2001 Nissan Altima from Global OBDII it comes up ECT_MOT_PWR which I havn't got a clue what it is. I wish I could do more. OBDII codes are only a starting point to the diagnosis of a problem.
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Old 07-09-2006, 04:07 PM
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2001 Altima P1126...

Hello matt167,
Thank you for your comments on P1126. There are no obvious signs of overheating or overcooling and the temperature gauge needle hangs mid range during extended operation.

It may be more likely related to the fuel air metering as you commented. I also saw the ECT Mot Pwr on some internet sites and don't think that it pertains in the 2001 year. I noticed that the same codes mean different things from one year to another which strikes me as a good way to generate maximum confusion.

Thank you for what you were able to find.

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