Powertrain
generic / SAE
P011A
Engine Coolant Temperature Sensor 1/2 Correlation
ECT sensors 1 and 2 readings disagree beyond plausible limits — typically near startup both should match within tolerance.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number1 / 1A
Possible causes
- One sensor drifted high
Symptoms
- Check engine light on
- Cooling fan runs constantly or not at all
- Cabin heater weak or excessively hot
- Possible long warm-up time or hard cold start
Inspection / repair
- Difficulty: easy
- DIY: possible
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References
sae:J2012