P0ADE code meaning
Hybrid/EV Battery Negative Contactor Control Circuit Range/Performance
Powertrain system Generic code P0Axx codes Check engine light
What P0ADE means
P0ADE is set when the coil circuit of the negative main contactor works electrically but its values are implausible, such as coil current or hold voltage out of range or a slow response after the command. No manufacturer publicly documents this code; GM, whose tables cover the negative contactor driver codes P0ADD, P0ADF and P0AE0 in detail, does not use P0ADE. CARB 1968.2 requires rationality and functional checks on hybrid output components. The contact-side faults P0AA4 (stuck closed) and P0AA5 (stuck open) are separate diagnoses. Possible effects are an intermittent failure to reach ready mode or charge.
P0ADE at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0ADE
- Vehicle will not enter ready mode or start
- Hybrid or EV warning light and check engine light
- Charging not possible
Common causes of P0ADE
- Most likelyHigh resistance in coil wiring or connector
- PossibleNegative contactor coil degraded
- PossibleWeak 12 V battery during start-up
- Less likelyBattery controller fault or software
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery neg contactorWiring harnessBms
What each part of P0ADE means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| A | Area: hybrid propulsion. |
| DE | The exact fault in that area. |
What to do next
- Note P0ADE 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 P0ADE
What does P0ADE mean?
P0ADE means "Hybrid/EV Battery Negative Contactor Control Circuit Range/Performance". P0ADE is set when the coil circuit of the negative main contactor works electrically but its values are implausible, such as coil current or hold voltage out of range or a slow response after the command. It is a generic code, so it means the same on every make.
Is it safe to drive with P0ADE?
Drive gently and only to a workshop. With P0ADE the car can go into limp mode (reduced power) to protect itself.
Will P0ADE fail an emissions test?
Yes, it can. P0ADE is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0ADE to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0ADE clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.