P0ADB code meaning
Hybrid/EV Battery Positive Contactor Control Circuit Low
Powertrain system Generic code P0Axx codes Check engine light
What P0ADB means
P0ADB means the drive circuit of the positive main contactor reads too low, mostly a short to ground. GM uses it widely: 2016-19 tables set it when the control voltage stays under 5.35 V with the contactor commanded on, 13 of 16 samples, Type B. The 2013 eAssist battery controller checks the low-side driver in the off state for a short to ground or an open circuit, 3 of 5 samples, two trips. Audi lists P0ADB00 in battery management 2 (J1120) of 2019-22 A6 to Q8 models with a software fix (TSB 2066205), and Dodge names it for the 2024 Charger EV (TSB 08-071-25). The battery then cannot be connected, so the vehicle will not become ready.
P0ADB 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 P0ADB
- Vehicle does not start; multiple warnings in the cluster
- Hybrid or EV warning light
- Charging not possible
Common causes of P0ADB
- Most likelyCoil control wire shorted to ground
- PossibleContactor coil internally shorted
- PossibleBattery controller software sets the code (Audi, Dodge bulletins)
- Less likelyDriver stage in the battery controller defective
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery pos contactorWiring harnessBms
What each part of P0ADB 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. |
| DB | The exact fault in that area. |
What to do next
- Note P0ADB 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 P0ADB
What does P0ADB mean?
P0ADB means "Hybrid/EV Battery Positive Contactor Control Circuit Low". P0ADB means the drive circuit of the positive main contactor reads too low, mostly a short to ground. It is a generic code, so it means the same on every make.
Is it safe to drive with P0ADB?
Drive gently and only to a workshop. With P0ADB the car can go into limp mode (reduced power) to protect itself.
Will P0ADB fail an emissions test?
Yes, it can. P0ADB 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 P0ADB to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0ADB clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.