P0D7C: A/C Compressor Motor Phase V Current Low

P0D7C relates to phase V of the three-phase motor in an electric A/C compressor. GM documents it in the 2011–2015 Volt and 2016 ELR tables as a standstill check: with the compressor speed request at 0 rpm the measured phase V current should be near zero, and a value of +68 A or above in 30 of 60 samples (50 ms each) sets the code. It is Type B, so the MIL comes on after two trips, and the result only returns to pass after a 12 V reset. The later Volt tables from 2016 do not list it. As the motor cannot carry that current while stopped, an offset in the inverter's phase V current sensor is the likely cause, and the compressor is normally replaced. Related: P0D7D for the negative side, P0D7A and P0D7E for the other phases.

Symptoms

• Check engine light after two trips
• Air conditioning inoperative

Most likely causes

• Offset or failure of the phase V current sensor in the inverter
• Fault in the inverter's current measuring circuit

What to check, in order

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

1. Check the sensor pressure in live data
2. With the connector unplugged, check whether the signal wire is making contact with ground.
3. Check the relay and connector
4. Have the refrigerant charge and any leaks checked at a repair shop authorized to handle refrigerant

What each character of P0D7C means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• D: Subsystem depends on the code range
• 7C: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0D7C?

Yes, you can keep driving. The air conditioning may not work.

What causes code P0D7C?

The most common causes are: offset or failure of the phase V current sensor in the inverter; fault in the inverter's current measuring circuit.

Related codes

• P0D7DA/C Compressor Motor Phase V Current High
• P0D7AA/C Compressor Motor Phase U Current Low
• P0D7EA/C Compressor Motor Phase W Current Low
• P0D6FA/C Compressor Motor Current High

Sources

• gsi.ext.gm.com: 11OBDG01 HYBRID Diagnostics
• gsi.ext.gm.com: 14OBDG01 Hybrid Diagnostics
• gsi.ext.gm.com: 16OBDG01 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.