P0D14 code meaning
Battery Charging System Negative Contactor A Control Circuit High
What P0D14 means
P0D14 is set when the control line of negative charging contactor A reads too high, for example through a short to the 12 V supply or a driver stage that will not switch off. That can keep the coil energised and the contactor closed without a command, so the module blocks charging. No manufacturer documents P0D14 publicly; on the Volt and ELR GM counts a short to power under P0D11 and detects it when the off-state output stays close to supply voltage. CARB requires plug-in vehicles to monitor charging components. Chafed or crossed wiring and a failed driver are the main causes. The low case is P0D13, a welded contactor P0D0F, the positive side P0D0D. Repairs belong in the hands of high-voltage trained staff.
P0D14 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0D14
- Charging blocked
- Charging or high-voltage system warning
Common causes of P0D14
- Most likelyControl wire shorted to a supply voltage
- PossibleDriver stage in the control module stuck on
- Less likelyOpen ground return of the coil letting the line float high
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Bcs neg contactor aWiring harnessBms
What each part of P0D14 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 14 | The exact fault in that area. |
What to do next
- Note P0D14 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 P0D14
What does P0D14 mean?
P0D14 means "Battery Charging System Negative Contactor A Control Circuit High". P0D14 is set when the control line of negative charging contactor A reads too high, for example through a short to the 12 V supply or a driver stage that will not switch off. It is a generic code, so it means the same on every make.
Is it safe to drive with P0D14?
P0D14 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0D14 fail an emissions test?
P0D14 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 P0D14 to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0D14 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.