OBD-II code · Powertrain (generic, extended)
P2DA6 Coolant Heater A Over Temperature
Coolant heater A reports temperature above the protection threshold. Coolant flow blocked or thermistor failed.
Is it safe to drive with P2DA6?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyCoolant flow through heater blocked
- PossibleThermistor failed
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Coolant Heater A, Coolant Heater A Control Module
Related codes
- P2DA3Gear Shift Control Module B Overtemperature
- P2DA4Coolant Heater A Internal Control Module Performance
- P2DA5Coolant Heater A Supply Voltage Circuit
- P2DA7Coolant Heater A Control Module System Voltage
- P2DA8DC/AC Converter Control Module A Switch A Circuit
- P2DA9DC/AC Converter Control Module A Switch A Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.