OBD-II code · Powertrain (generic)
P0D78 A/C Compressor Control Module Output Driver Temperature Sensor Circuit Low
The ECM detects a low fault on the a/c compressor control module output driver temperature sensor circuit. Reading cannot be used reliably for control.
Is it safe to drive with P0D78?
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
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- AC Compressor Cm Output Driver Temp Sensor, Wiring Harness, AC Compressor Module
Related codes
- P0D75A/C Compressor Control Module Output Driver Temperature Sensor Circuit
- P0D76A/C Compressor Control Module Output Driver Temperature Sensor Performance
- P0D77A/C Compressor Control Module Output Driver Temperature Sensor Circuit High
- P0D79A/C Compressor Control Module Output Driver Temperature Sensor Circuit Intermittent/Erratic
- P0D7AA/C Compressor Motor Phase U Current Low
- P0D7BA/C Compressor Motor Phase U Current High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.