P0D0ABattery Charging System Positive Contactor A Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- How the car detects it
- 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.
- What you may notice
- Malfunction indicator lamp (GM Type A or B)
- Vehicle does not charge
- Likely causes
- LikelyOpen or high-resistance coil control wire or connector
- PossibleContactor coil open
- RareControl wire shorted to a supply voltage
- RareFaulty high-side driver in the control module
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.