OBD-II code · Powertrain (generic)
P0A05 Motor Electronics Coolant Pump A Control Circuit/Open
The motor electronics coolant pump A control circuit reports a control circuit/open condition. Power electronics cooling cannot be commanded reliably.
Is it safe to drive with P0A05?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyOpen in pump control wire
- PossibleOpen pump motor
- Less likelyPin pushed back out of connector body
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–7 h
- Emissions test
- Usually unaffected
- Parts involved
- Motor Electronics Coolant Pump A, Wiring Harness, Hybrid Control Module
Related codes
- P0B38Motor Electronics Coolant Pump B Control Circuit/Open
- P2BD4Motor Electronics Coolant Pump C Control Circuit/Open
- P0A02Motor Electronics Coolant Temperature Sensor Low Input
- P0A03Motor Electronics Coolant Temperature Sensor High Input
- P0A04Motor Electronics Coolant Temperature Sensor A Circuit Intermittent
- P0A06Motor Electronics Coolant Pump A Control Circuit Low
- P0A07Motor Electronics Coolant Pump A Control Circuit High
- P0A08DC/DC Converter Status Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.