P2D3FHybrid/EV Battery Cooling System B Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2D3F is the functional check of a second cooling path of the traction battery, alongside A (P0C32) and C (P2D40). Which path carries which letter is the manufacturer's choice; packs may be cooled by air, by a coolant radiator or by a refrigerant chiller, and some switch between them. No manufacturer documents P2D3F publicly. CARB requires a cooling performance check where feasible, and published tests show the principle: GM's 2012 Volt fails its battery cooling check under P0C32 when the average pack temperature stays above 40 °C during active cooling, Type A. Ford, which uses letter C for the chiller path of its Explorer and Aviator hybrids, tests that path by commanding maximum chiller flow and expecting the inlet coolant to fall by 3 °C. Expect reduced power or charging when the pack runs hot.
- What you may notice
- Malfunction indicator lamp or hybrid system warning on
- Reduced electric power or slower fast charging in hot weather
- Likely causes
- LikelyLow coolant or trapped air in the battery loop
- PossibleBlocked radiator, cooler or air duct of this cooling path
- PossibleDiverter valve or pump that does not route enough flow through path B
- RareCoolant or cell temperature sensor reading wrong
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.