Powertrain, generic

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

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

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.

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

Symptoms

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

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

P0EB5P0EB6P0EBBP0EB4P0EBA

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