P0D0C

What it means

P0D0C means the control unit that operates the high-voltage battery charging contactors saw a low voltage on the control circuit for the positive charging contactor 'A'. This usually points to a short to ground, a wiring or connector fault, or a fault in the contactor coil or the driver inside the module. Exactly which module controls the contactor, and how the contactor is wired, depends on the model.

Symptoms

• Warning light for the hybrid or EV system, or a general malfunction indicator lamp
• Vehicle will not charge from a plug-in charger, or charging stops soon after it starts
• Charging port or charge status indicator shows a fault
• Reduced or no electric drive on some models
• Clicking from the contactor heard only intermittently, or not at all
• Fault returns soon after the code is cleared

Possible causes

• Damaged wiring or a chafed harness shorting the contactor control circuit to groundlikely
• Corroded, loose or water-contaminated connector at the contactor or control modulelikely
• Contactor coil with an internal short or other faultpossible
• Low 12 V supply or poor earth to the control module, affecting the driver circuitpossible
• Fault in the control module's internal driver for the contactorrare
• Outdated control module software, where a known fault is documented for that modelrare

How to diagnose

1. Read all stored and pending codes and the freeze frame data, noting whether the fault was present during charging, at start-up or while driving.
2. Check the 12 V battery condition and charging voltage, as low supply voltage can set control circuit faults, and note any related codes.
3. Follow the manufacturer's high-voltage safety procedure first. Only a technician trained in high-voltage systems should open or test any part of the high-voltage system.
4. Visually inspect the harness and connectors between the control module and the charging contactor for chafing, water ingress, corrosion, pin damage or previous repairs.
5. Check the module's supply and earth connections for voltage drop and continuity.
6. With the system safely isolated, measure the contactor coil resistance and compare it with the manufacturer's specification.
7. Test the control wire for a short to ground and for continuity, with the connector disconnected at both ends.
8. With the system safely powered up, use live data or an actuator test to see whether the contactor is commanded and responds correctly. Check for any available software update relevant to the code.

How to fix

• Repair or replace damaged wiring, and secure the harness away from sharp edges or heat.
• Clean, dry and properly refit connectors, and replace any with corroded or damaged terminals.
• Replace the charging contactor or contactor assembly if the coil or its resistance is out of specification.
• Restore the 12 V supply and earth connections, and replace a weak 12 V battery.
• Replace or repair the control module if the driver circuit is proven faulty, then complete any required setup.
• Update the control module software if the manufacturer lists it as the fix for this fault.

Can I keep driving?

Nearby codes

• P0D0BGenericBattery Charging System Positive Contactor A Control Circuit Range/Performance
• P0D0DGenericBattery Charging System Positive Contactor A Control Circuit High