P0EB7: A/C Compressor Motor Phase V Current Sensor Range/Performance

With P0EB7 the compressor's phase V current value passes the electrical limits but is not credible. The controller compares it with the other two phases and with the current it is commanding; a persistent offset, a reading that lags or is scaled wrongly, or a three-phase sum far from zero all point at the V sensor. No manufacturer documents P0EB7 publicly. GM's 2011 Volt shows one form of such a check, performed at standstill (older codes P0D7C and P0D7D at plus or minus 68 A). Rough compressor running, noise or reduced cooling can appear before the controller gives up and switches off. Electrical faults of the same phase are P0EB5, P0EB6 and P0EBB; the matching checks on U and W are P0EB4 and P0EBA.

Symptoms

• Uneven compressor running or humming noise
• Cooling weakens, then fails

Most likely causes

• Persistent offset or scaling error of the phase V sensor
• Slow or filtered V-phase measurement on the inverter board
• Fault in the V winding or its internal lead

What to check, in order

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

1. Check the sensor pressure in live data
2. Compare the reading with other engine data while varying the engine speed.
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 P0EB7 means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• E: Subsystem depends on the code range
• B7: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0EB7?

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

What causes code P0EB7?

The most common causes are: persistent offset or scaling error of the phase V sensor; slow or filtered V-phase measurement on the inverter board; fault in the V winding or its internal lead.

Related codes

• P0EB5A/C Compressor Motor Phase V Current Sensor Circuit High
• P0EB6A/C Compressor Motor Phase V Current Sensor Circuit Low
• P0EBBA/C Compressor Motor Phase V Current Sensor Circuit
• P0EB4A/C Compressor Motor Phase U Current Sensor Range/Performance
• P0EBAA/C Compressor Motor Phase W Current Sensor Range/Performance

Sources

• gsi.ext.gm.com: 11OBDG01 HYBRID Diagnostics
• law.cornell.edu: 13 CCR 1968.2

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.