OBD-II code · Powertrain (generic)
P0A37 Generator Temperature Sensor Circuit Range/Performance
The ECM detects a circuit range/performance fault on the generator temperature sensor. Reading cannot be used reliably for control.
Is it safe to drive with P0A37?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor characteristic drifted
- PossibleSensor mounting displaced
- Less likelySensor element aged beyond calibration window
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Generator Temp Sensor, Wiring Harness, Hybrid Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.