P0E70 code meaning
Battery Charging System Precharge Contactor Control Circuit High
What P0E70 means
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.
P0E70 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0E70
- Charging locked out with a high-voltage fault message
- Contactor clicks without a charging request
Common causes of P0E70
- Most likelyCoil control wire shorted to a 12 V supply
- PossibleDriver stage in the battery management unit stuck on
- Less likelyOpen ground return of the coil leaving the line at supply level
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Precharge contactorWiring harnessBms
What each part of P0E70 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 70 | The exact fault in that area. |
What to do next
- Note P0E70 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0E70
What does P0E70 mean?
P0E70 means "Battery Charging System Precharge Contactor Control Circuit High". P0E70 is the high-side counterpart of P0E6F: the coil line of the charging precharge contactor carries voltage although the driver is off. It is a generic code, so it means the same on every make.
Is it safe to drive with P0E70?
P0E70 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0E70 fail an emissions test?
P0E70 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P0E70 to fix?
Difficulty: workshop only. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P0E70 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.