P0D0A covers the drive circuit of positive charging contactor A: the module compares the commanded state of its driver with the voltage and current it actually sees on the coil line. GM spells this out for the Chevrolet Volt and Cadillac ELR: with the driver off, an output above 4 V means an open line and one close to supply voltage a short to power; with the driver on, coil current below 57 mA (Volt 2019: 194 mA) also counts as open. 40 of 50 samples at 12.5 ms set the code. The 2011 and 2014 Volt and the ELR rate it Type A, the 2016 and 2019 Volt Type B with MIL after two trips. GM adds that the test cannot see a short to ground. Range/performance, low and high are P0D0B–P0D0D. Without a working contactor the car will not charge.
High severity. Can I keep driving?If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.
Symptoms
- Malfunction indicator lamp (GM Type A or B)
- Vehicle does not charge
Most likely causes
- Open or high-resistance coil control wire or connector
- Contactor coil open
- Control wire shorted to a supply voltage
- Faulty high-side driver in the control module
What to check, in order
Start with the simplest. You can tick off each step.
What each character of P0D0A means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- D: Subsystem depends on the code range
- 0A: Specific fault in that system
Frequently asked questions
Can I keep driving with code P0D0A?
If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.
What causes code P0D0A?
The most common causes are: open or high-resistance coil control wire or connector; contactor coil open; control wire shorted to a supply voltage.
Related codes
- P0D07Battery Charging System Positive Contactor A Circuit
- P0D09Battery Charging System Positive Contactor A Stuck Open
- P0D0BBattery Charging System Positive Contactor A Control Circuit Range/Performance
- P0D0CBattery Charging System Positive Contactor A Control Circuit Low
- P0D0DBattery Charging System Positive Contactor A Control Circuit High
- P0D11Battery Charging System Negative Contactor A Control Circuit/Open
Sources
- gsi.ext.gm.com: 11OBDG01 HYBRID Diagnostics
- gsi.ext.gm.com: 14OBDG01 Hybrid Diagnostics
- gsi.ext.gm.com: 16OBDG01 Hybrid Diagnostics
- gsi.ext.gm.com: 19OBDG01 Hybrid Diagnostics
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.