P2D4AHybrid/EV Battery Pack F Over Temperature
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2D4A covers section F, the sixth part of a battery whose controller watches temperature section by section. It pairs naturally with P0EE1, the deterioration code of the same section: aged cells with higher internal resistance turn more current into heat, and repeated overheating speeds up ageing, so both entries on one letter point at the modules themselves rather than at cooling. No manufacturer documents P2D4A publicly. How strictly a lamp follows varies even for the whole-pack code: GM's eAssist table 13OBDG05C sets P0A7E above 72.3 °C, taken from the maximum of the healthy sensors, as a Type B code with the MIL after two trips, while its plug-in tables rate it Type A. CARB requires cooling performance checks. Power is limited.
- What you may notice
- Warning light; timing depends on manufacturer (first or second trip)
- Shorter electric range and weaker electric drive
- Battery fan or coolant pump louder than usual
- Likely causes
- LikelyAged modules in section F producing extra heat (often with P0EE1)
- PossibleInsufficient cooling flow to section F
- RareSensor in section F reading too high
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.