P0A37: Generator Temperature Sensor Circuit Range/Performance
What to do
No urgency, but worth fixing — this sensor is what lets the module work the generator confidently.
What this code means
The generator temperature reading is alive but implausible — stuck, drifting, or contradicting the vehicle's other temperatures.
P0A2B's reasoning, on the generator: a frozen or drifted thermistor passes electrical checks and fails this one. Family context at P0A36.
Likely causes
Start here
- Faulty motor temperature sensor · specialist
- Corroded or loose connector · easy
Less common
- Sensor drifted out of calibration · specialist
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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