OBD-II code · Powertrain (generic)
P0A38 Generator Temperature Sensor Circuit Low
The ECM detects a circuit low fault on the generator temperature sensor. Reading cannot be used reliably for control.
Is it safe to drive with P0A38?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to ground
- PossibleInternal sensor short
- Less likelyConnector pins corroded - high contact resistance
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.