Powertrain, generic · Hybrid propulsion

P0D69 A/C Compressor Motor Voltage Sensor A Performance

Check engine lightOn
EmissionsNot relevant
Drive cycleRequired
Limp modeNo

P0D69 is a plausibility check: the high voltage that the electric A/C compressor measures at its input should match the traction battery voltage, since both see the same supply. GM's Volt sets it when the two differ by more than 15 V in the 2011 table (35 of 40 samples at 250 ms) and by more than 30 V in the 2016 and 2019 tables (8 of 10 s in 2019), each Type B with MIL after two trips and only with contactors closed and no battery voltage codes active. Mitsubishi's Outlander PHEV uses 20 V for 2 s, with the compressor reading 205 to 415 V, a battery above 15 °C and intake air above 0 °C; the 2023 model lights only the MIL for it. Usual causes are the compressor's internal measurement, the data link carrying its value, or the hybrid controller. Range faults are P0D6A and P0D6B.

Likely causes

Drifting high-voltage measurement inside the electric compressor
Fault on the data bus that carries the compressor voltage value
Hybrid or vehicle controller misjudging the comparison
Error in the battery voltage measurement used as reference

Symptoms

  • Check engine light
  • Air conditioning weak or switched off
  • Often no other noticeable change

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–2,500
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

P0D68P0D6AP0D6BP0D6CP0ABB

References: gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com, mitsubishitechinfo.com.