P2DA5
Coolant Heater A Supply Voltage Circuit
Coolant heater A supply voltage circuit reports a fault. Heater may not start when commanded.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Supply fuse blownCommon
- Wiring faultPossible
Parts involved
- Coolant Heater A
- Coolant Heater A Control Module
P2DA5 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.