P0E6D: Battery Charging System Precharge Contactor Control Circuit/Open

P0E6D concerns the low-voltage side of the charging precharge contactor: the coil circuit through which the control unit switches it, typically interrupted. Unlike P0E6C, which judges what happens on the high-voltage side, this code comes from the driver output itself. No manufacturer documents P0E6D publicly. GM uses the same method on the positive charging contactor of its 2019 hybrids (P0D0A): an open is recognised when the switched-off output still shows more than 4 V, or when less than 194 mA flows with the output on; 40 failed samples out of 50 at 12.5 ms set a Type B code. Mitsubishi's i-MiEV compares a coil monitor with the command and stores P0AE6 for the charging contactor. Range, low and high faults of the coil circuit are P0E6E to P0E70.

Symptoms

• Charging cannot be started
• High-voltage system fault message

Most likely causes

• Broken coil control wire or unplugged connector
• Open winding in the contactor coil
• Failed driver stage in the battery management unit

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 continuity of the wire between the component and the control module.
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 P0E6D means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• E: Subsystem depends on the code range
• 6D: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0E6D?

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 P0E6D?

The most common causes are: broken coil control wire or unplugged connector; open winding in the contactor coil; failed driver stage in the battery management unit.

Related codes

• P0E6EBattery Charging System Precharge Contactor Control Circuit Range/Performance
• P0E6FBattery Charging System Precharge Contactor Control Circuit Low
• P0E70Battery Charging System Precharge Contactor Control Circuit High
• P0D0ABattery Charging System Positive Contactor A Control Circuit/Open
• P0AE4Hybrid/EV Battery Precharge Contactor A Control Circuit/Open

Sources

• gsi.ext.gm.com: 19OBDG01 Hybrid Diagnostics
• static.nhtsa.gov: MC 10158410 9999

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.