Powertrain, generic · Hybrid propulsion

P0D6C A/C Compressor Motor Voltage Sensor A Circuit Intermittent/Erratic

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0D6C covers a voltage-sensor signal from the electric A/C compressor that jumps or drops out briefly instead of staying wrong: single readings outside the expected window or abrupt steps that do not last long enough for the low or high code. No manufacturer documents P0D6C publicly. GM (Volt, ELR) and Mitsubishi (Outlander PHEV) monitor the same input but only publish P0D69 (comparison with battery voltage), P0D6A and P0D6B, each with fixed fail counts such as 30 of 60 samples or 2 s. CARB requires the sensor inputs of hybrid thermal-management parts, which include a compressor that also cools the battery, to be checked for circuit and rationality faults. Loose low-voltage plugs, a marginal HV contact or a failing inverter board are typical; cooling may cut in and out.

Likely causes

Loose or corroded low-voltage connector at the compressor
Intermittent fault on the compressor's inverter board
Marginal high-voltage contact at the compressor connector

Symptoms

  • Air conditioning cools intermittently
  • Code returns sporadically after clearing
  • Often no warning light

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 awiring harnessac compressor module

Related codes

P0D68P0D69P0D6AP0D6B

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