P0A00
Motor Electronics Coolant Temperature Sensor Circuit
The hybrid control module detects an out-of-range signal from the temperature sensor of the inverter/motor electronics coolant loop. This sensor protects power electronics from overheating.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: shop_only
Common causes
Ordered by how often each turns out to be the cause.
- Temperature sensor failedCommon
- Wiring or connector faultPossible
Parts involved
- Motor Electronics Coolant Temperature Sensor
- Hybrid Inverter
- Wiring Harness
P0A00 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.