OBD-II code · Powertrain (generic)
P0A04 Motor Electronics Coolant Temperature Sensor A Circuit Intermittent
The motor electronics coolant temperature sensor A signal drops out intermittently. Loose connector or noisy ground reference.
Is it safe to drive with P0A04?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyConnector not seated
- PossibleNoisy ground reference
- Less likelyConnector with intermittent contact under vibration
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
- Motor Electronics Coolant Temp Sensor A, Wiring Harness, Hybrid Control Module
Related codes
- P0A01Motor Electronics Coolant Temperature Sensor Range/Performance
- P0A02Motor Electronics Coolant Temperature Sensor Low Input
- P0A03Motor Electronics Coolant Temperature Sensor High Input
- P0A05Motor Electronics Coolant Pump A Control Circuit/Open
- P0A06Motor Electronics Coolant Pump A Control Circuit Low
- P0A07Motor Electronics Coolant Pump A Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.