P0D0D: Battery Charging System Positive Contactor A Control Circuit High

P0D0D means the control line of positive charging contactor A sits too high, typically from a short to a supply voltage or a driver that no longer switches off. The coil may then stay energised, so the contactor could close without a command, which the module has to prevent. No manufacturer documents P0D0D publicly; on the Chevrolet Volt GM folds the short to power into P0D0A and flags it when the off-state output stays within 0.4 V of supply. CARB requires plug-in vehicles to monitor charging components. Causes are crossed or chafed wiring and a failed driver inside the control module. Low readings are P0D0C, opens P0D0A, a welded contactor P0D08. The system normally blocks charging until the fault is gone.

Symptoms

• Charging blocked
• Charging or high-voltage system warning

Most likely causes

• Control wire shorted to a supply voltage
• Driver stage in the control module stuck on
• Open ground return of the coil letting the line float high

What to check, in order

Start with the simplest. You can tick off each step.

1. Read the codes with a hybrid-compatible scanner and write down the freeze frame data
2. Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
3. Make sure the battery cooling air intake is clean
4. Check the 12 V auxiliary battery, which can also trigger warnings
5. Leave any high-voltage measurements to a specialized repair shop

What each character of P0D0D means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• D: Subsystem depends on the code range
• 0D: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0D0D?

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 P0D0D?

The most common causes are: control wire shorted to a supply voltage; driver stage in the control module stuck on; open ground return of the coil letting the line float high.

Related codes

• P0D0ABattery Charging System Positive Contactor A Control Circuit/Open
• P0D0BBattery Charging System Positive Contactor A Control Circuit Range/Performance
• P0D0CBattery Charging System Positive Contactor A Control Circuit Low
• P0D08Battery Charging System Positive Contactor A Stuck Closed
• P0D14Battery Charging System Negative Contactor A Control Circuit High

Sources

• law.cornell.edu: 13 CCR 1968.2
• 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.