P0DE8Hybrid/EV Battery Pack Coolant Control Valve C Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0DE8 reports an open or otherwise faulty drive circuit for coolant control valve C, a third switchable valve in the coolant loop of the hybrid or EV battery. What it switches depends on the layout, for example whether coolant passes through the radiator, the air-conditioning chiller or a heater, and the maker decides which valve is called C. No manufacturer documents P0DE8 publicly. The closest documented case is valve A: the battery management of Mercedes S-, E- and C-Class hybrids flags its actuation as electrically faulty or open with P0CDF00 (LI83.30-P-061224). CARB demands circuit checks on every output used to heat or cool the energy store. Expect a broken wire, a loose plug or an open coil. Shorts are P0DEB and P0DEC, an overloaded driver P0E22.
- What you may notice
- Battery temperature control works only in a fallback mode
- Charging or drive power reduced when the pack is too hot or cold
- Malfunction indicator lamp on
- Likely causes
- LikelyBroken wire or loose connector at valve C
- PossibleOpen coil or motor winding inside valve C
- PossibleCorroded pins from coolant or water ingress
- RareFailed driver stage in the controlling module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.