P2C94Hybrid/EV Battery Contactor Control Supply 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
- P2C94 says the supply feeding the contactor drivers lies below its lower limit. Ford is the maker that documents it: special service messages 51513 and 51783 (2023) describe 2021–2023 Escape, Corsair, Aviator, Mustang Mach-E, F-150 and Transit plug-in models whose AC charging at level 1 or 2 stops with the MIL on and P2C94 logged in the SOBDM, the on-board charger module. As a stopgap the charge handle is unplugged and reconnected; a new SOBDM does not help. TSB 23-2399, extended by 24-2027 to the 2023 E-Transit, blames SOBDM software and cures it by reprogramming. Ford does not say which supply it measures. On other vehicles a genuinely low feed, as described in patent US12007445B2, can stop contactors closing fully. Compare P2C95 for the high side.
- What you may notice
- AC charging stops while plugged in, MIL on
- Charging resumes after unplugging and reconnecting
- Vehicle may not become ready to drive
- Likely causes
- LikelyOn-board charger (SOBDM) software, Ford TSB 23-2399/24-2027
- PossibleSupply feed pulled down by a weak 12 V battery or poor ground
- RarePartial short or high resistance in the supply wiring
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €0 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.