P0DFFBattery Charger Coolant Control Valve Control Circuit High
- Generic OBD-II code · Powertrain
- How the car detects it
- P0DFF is the short-to-voltage case for the valve that cools the on-board charger. The controller sees the drive line high while commanding it low. No manufacturer documents P0DFF publicly. The closest published logic is GM's 2011 Volt monitor for battery coolant valve A (P0CE3). It watches for a high sense level on drive 1 while the valve is stopped or moving forward, above 9 V system voltage, and stores a two-trip Type B code only after 90 bad results in 100 samples taken at 6.25 ms intervals. If the wire is stuck at battery potential the actuator stays powered, and the valve can travel to its end position rather than stopping where it was. If that leaves the charger uncooled, charging power drops. Usual causes are chafed insulation touching a powered conductor or an output stage that fails to turn off. Ground short is P0DFE.
- What you may notice
- Charging slower or charger warning
- Valve audibly running to its end stop
- Driving normally unaffected
- Likely causes
- LikelyControl wire shorted to a supply voltage
- PossibleOutput stage in the controlling module will not switch off
- RareInternal fault in the valve actuator
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.