P2DA6Coolant Heater A Over Temperature
- Generic OBD-II code · Powertrain
- How the car detects it
- P2DA6 says coolant heater A, the electric coolant heater of a hybrid or EV, has become too hot. Such heaters measure outlet coolant or housing temperature and switch off above a limit; a Hyundai/Kia patent (US11378000B2) does exactly that, mainly to protect the elements when coolant is missing. Ford is the one maker documented: on 2023 F-150 Lightning trucks built from 31 July 2023 the module SOBDMC can store P2DA6 because of its software. In SSM 52211 the pinpoint test points to software when the ECT2 reading exceeds 70 °C; TSB 23-2375 cures it by reprogramming the SOBDMC and running maximum heat for five minutes. Without symptoms Ford needs no further work; with too little cabin heat, low coolant, air or a pump that does not run are the usual causes.
- What you may notice
- Often no noticeable symptom, code found during service
- Heater switches off, cabin warms only weakly
- Climate system message, no check engine light
- Likely causes
- LikelySoftware of the controlling module (Ford Lightning SOBDMC), reprogramming
- PossibleLow coolant level or air trapped in the heater loop
- PossibleHeater loop coolant pump not running or valve blocking flow
- RareTemperature sensor in heater or loop reading too high
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.