P0D25Battery Charger System Precharge Time Too Short
- Generic OBD-II code · Powertrain
- How the car detects it
- P0D25 is about the precharge of the charger's high-voltage bus, the short phase before the charging contactors close in which the bus capacitance is brought up to battery voltage through a limiting path. The code means this voltage arrived sooner than physically plausible. No manufacturer documents P0D25 publicly. GM describes the counterpart test for the charger bus under P0D26, with a window of 5 % around pack voltage, and the same principle for the main battery under P0C77, where the 2011 Volt flags a rise above 95 % within 50 ms. A rise that quick suggests a bypassed precharge resistor, a contactor that is welded or closes early, missing bus capacitance or a voltage sensor reporting wrong values. CARB requires charger faults that affect charging to be detected. Charging is normally refused.
- What you may notice
- Charging refused at the start of a session
- Charging system warning
- Likely causes
- PossiblePrecharge resistor bypassed or shorted
- PossibleCharging contactor welded or closing too early
- RareBus or pack voltage sensor reporting wrong values
- RareBus capacitance much lower than expected
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.