P0DEBHybrid/EV Battery Pack Coolant Control Valve C Control Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0DEB is set when the drive line of coolant control valve C reads too low, which almost always means a short to ground somewhere between controller and valve. No manufacturer documents P0DEB publicly. GM's 2011 Volt tables for valve A show the logic: with system voltage above 9 V, a low reading on driver line 1 during reverse travel counts as a failure, and 90 failures out of 100 samples at 6.25 ms set a Type B code. A short to ground lets current bypass the load, so many drivers protect themselves by shutting off; an overheated or overloaded driver has its own code, P0E22. Chafed insulation near brackets, coolant in the connector and an internal short in the valve motor are the usual finds. The valve then stays wherever it was. Open circuit is P0DE8, short to voltage P0DEC.
- What you may notice
- Valve C no longer moves, temperature control in fallback mode
- Charging or drive power reduced at temperature extremes
- Malfunction indicator lamp on
- Likely causes
- LikelyChafed wire shorting to body ground
- PossibleCoolant or water in the valve connector
- PossibleInternal short in the valve motor
- 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.