P0D7F: A/C Compressor Motor Phase W Current High

P0D7F is the negative-direction current code for phase W of the electric A/C compressor motor. In GM's first-generation Volt and the 2016 ELR the inverter reports a W-phase current of −68 A or lower while the motor is stopped and no speed is requested; 30 such readings in 60 samples at 50 ms set the code, Type B with MIL after two trips, and a 12 V reset is required before it can pass. Since no current can flow in a stopped motor, a sensor offset or a fault in the measuring circuit is the cause, not the refrigerant system. Repair is normally a compressor assembly. GM's second-generation Volt no longer lists these phase codes. Related: P0D7E on the same phase, P0D7B and P0D7D on the others.

Symptoms

• Check engine light after two trips
• Air conditioning inoperative

Most likely causes

• Phase W current sensor reading negative at standstill
• 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. Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
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 P0D7F means

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

Frequently asked questions

Can I keep driving with code P0D7F?

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

What causes code P0D7F?

The most common causes are: phase W current sensor reading negative at standstill; fault in the inverter's current measuring circuit.

Related codes

• P0D7EA/C Compressor Motor Phase W Current Low
• P0D7BA/C Compressor Motor Phase U Current High
• P0D7DA/C Compressor Motor Phase V Current High
• 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.