Powertrain, generic

P0EAF A/C Compressor Motor Current Sensor Circuit Low

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P0EAF reports that the compressor current signal sits at the bottom of its measuring range. In a running compressor this cannot be true, so the module suspects the measuring chain: a grounded signal path, a sensing chip without supply or an offset error inside the power module. No manufacturer documents P0EAF publicly. GM's 2011 Volt supervises the measured current only against upper limits (27 A over 30 of 60 samples for P0D6F, 60 A on a single sample for a maker code), and Audi documents only the plausibility sibling P0EAE. Without a valid current value the controller cannot protect the inverter, so it shuts the compressor down. Air conditioning stops working while the car itself remains fully drivable. The high counterpart is P0EB0.

Likely causes

Current signal path shorted to ground
Current sensor without supply voltage
Offset error of the measurement in the power module

Symptoms

  • Compressor shut down, warm air from the vents
  • Climate system fault message

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 current sensorac compressor modulewiring harness

Related codes

P0EB0P0EADP0EAEP0D6F

References: gsi.ext.gm.com, law.cornell.edu, static.nhtsa.gov.