P0E65Battery Charger Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- How the car detects it
- P0E65 flags a fault on the wired command line through which the hybrid control unit operates the on-board charger, most often an interrupted line. GM uses it codegenau: in the 2016 Volt the VICM runs the test, in the 2019 hybrid tables (19OBDG01) the HPC2 module. The check relies on a fault flag raised by the output driver hardware itself and only runs while system voltage is 10.2 V or higher and the charger enable mask is active. Samples are taken every 25 ms; 30 bad ones among 40 store the code. GM classes it Type B, so the MIL comes on once the fault returns on a second trip. Low, high and plausibility faults on the same line have their own codes, P0E66 to P0E68. Plug-in charging is usually refused until the line is repaired.
- What you may notice
- Vehicle does not charge when plugged in
- MIL after the second trip with the fault (GM)
- Charging fault message in the instrument cluster
- Likely causes
- LikelyBroken or disconnected charger control wire
- PossibleCorroded or pushed-out terminal at charger or control unit
- RareDefective output driver in the commanding control unit
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.