Powertrain, generic · Hybrid propulsion

P0D68 A/C Compressor Motor Voltage Sensor A Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

An electric A/C compressor in a hybrid or EV runs its motor from the high-voltage battery through an inverter in the compressor housing, and a sensor there measures the incoming high voltage. P0D68 is the general circuit code for that sensor: its signal is missing or unusable as a whole, without a specific low or high reading. No manufacturer documents P0D68 publicly. GM (Volt) and Mitsubishi (Outlander PHEV) monitor the same sensor but use P0D69 for plausibility against the battery voltage and P0D6A/P0D6B for out-of-range values. CARB requires electronic A/C components to be monitored where they affect engine control or other diagnostics. In practice the compressor controller stops the compressor when it cannot trust its input voltage, so cabin cooling and any refrigerant-based battery cooling are lost.

Likely causes

Voltage measurement inside the electric compressor's inverter failed
Compressor reports its sensor value over a faulty data link
Poor high-voltage connection at the compressor

Symptoms

  • Air conditioning does not cool
  • Warning message or warning light, depending on the vehicle
  • Battery cooling via refrigerant may be limited

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 voltage sensor aac compressor module

Related codes

P0D69P0D6AP0D6BP0D6C

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