P0E70Battery Charging System Precharge Contactor Control Circuit High
- Generic OBD-II code · Powertrain
- How the car detects it
- P0E70 is the high-side counterpart of P0E6F: the coil line of the charging precharge contactor carries voltage although the driver is off. A short to a 12 V feed can energise the coil without a command, which would let the precharge branch conduct unasked; the battery management therefore usually locks out charging. No manufacturer documents P0E70 publicly. For its positive charging contactor GM tests exactly this case in the 2019 hybrid tables (P0D0A): with the driver off, an output voltage above the 12 V battery voltage minus 0.4 V counts as a short to power, confirmed by 40 of 50 samples at 12.5 ms, Type B. Mitsubishi's i-MiEV sets P0AE7 when the coil monitor stays on after an off command. An open coil circuit is P0E6D.
- What you may notice
- Charging locked out with a high-voltage fault message
- Contactor clicks without a charging request
- Likely causes
- LikelyCoil control wire shorted to a 12 V supply
- PossibleDriver stage in the battery management unit stuck on
- RareOpen ground return of the coil leaving the line at supply level
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.