P0D7E: A/C Compressor Motor Phase W Current Low

P0D7E applies to phase W, the third winding of the electric A/C compressor motor. GM's 2011–2015 Volt and 2016 Cadillac ELR check the W-phase current sensor while the motor is at rest: a reading of +68 A or more in 30 out of 60 samples at 50 ms sets the code, Type B with the MIL after two trips, and only a 12 V reset re-enables a pass. With all three phase sensors tested the same way, a fault on just one phase points to that sensor channel on the inverter board, while faults on several phases at once suggest a common supply or reference problem in the inverter. The compressor stays off. P0D7F is the negative direction on phase W; P0D7A and P0D7C cover the other two phases.

Symptoms

• Check engine light after two trips
• Air conditioning does not run

Most likely causes

• Offset or failure of the phase W current sensor channel
• Common supply or reference fault in the inverter (several phases affected)

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 P0D7E means

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

Frequently asked questions

Can I keep driving with code P0D7E?

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

What causes code P0D7E?

The most common causes are: offset or failure of the phase W current sensor channel; common supply or reference fault in the inverter (several phases affected).

Related codes

• P0D7FA/C Compressor Motor Phase W Current High
• P0D7AA/C Compressor Motor Phase U Current Low
• P0D7CA/C Compressor Motor Phase V 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.