Powertrain, generic

P0EB6 A/C Compressor Motor Phase V Current Sensor Circuit Low

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0EB6 reports that the phase V current signal reads below its permissible minimum. The compressor's power module cannot regulate phase V without it and stops the motor. Candidates are a sensing path pulled to ground, a sensor that has lost its supply or a defect on the inverter board; a problem in the refrigerant circuit cannot produce this code. No manufacturer documents P0EB6 publicly. In the first-generation Chevrolet Volt, GM treated minus 68 A or lower on phase V with the motor at rest as a sensor fault (older code P0D7D, 30 of 60 samples, Type B). Because the sensor is built in, replacing the compressor unit is the normal fix. High range: P0EB5; general V circuit: P0EBB; the phase U and W equivalents are P0EB3 and P0EB9.

Likely causes

Phase V sensing path pulled to ground
Phase V sensor has lost its supply
Defect in the V channel of the inverter board

Symptoms

  • No air conditioning
  • Fault stored in the compressor control module

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€150–2,500
Time1–5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

ac compressor motor phase v current sensorac compressor module

Related codes

P0EB5P0EB7P0EBBP0EB3P0EB9P0D7D

References: gsi.ext.gm.com, law.cornell.edu.