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.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Motor electronics coolant temperature sensor
- Hybrid inverter
- Wiring harness
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Temperature sensor failed
- Wiring or connector fault
Diagnostic notes
- The malfunction indicator lamp may illuminate
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.