P0D0FBattery Charging System Negative Contactor A Stuck Closed
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- P0D0F flags negative charging contactor A as stuck closed: it still conducts after the open command, usually through welded contacts or a misjudged state. Ford stores it in the BECM of the 2021–2022 Mustang Mach-E together with main-contactor codes such as P0AA1 and P0AA4; bulletins 22-2178 and 23-2020 replace the high-voltage battery junction box and reprogram the BECM, and a flat 12 V battery or the Stop Safely Now warning may accompany it. Stellantis lists P0D0F-00 for the Grand Cherokee 4xe with a MIL, partly a false alarm, and cures it with BPCM software (0817922, 08-006-25). GM sets it together with P0D08 on the 2023 Lyriq after an interrupted AC session (23-NA-096). A Toyota patent checks such sticking via charge-port voltage. The positive side is P0D08, the opposite fault P0D10.
- What you may notice
- Malfunction indicator lamp or wrench lamp
- Stop Safely Now message or no ready mode (Ford)
- Discharged 12 V battery
- Likely causes
- LikelyFaulty high-voltage battery junction box with the charging contactors (Ford Mach-E)
- PossibleBattery module software misjudging the contactor (Stellantis 4xe, GM Lyriq)
- PossibleWelded contactor contacts
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €3,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.