Powertrain, generic (extended)

P2CFE A/C Clutch Control Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2CFE reports a clutch coil output that sits higher than it should, typically because the line touches a battery feed. Then the clutch may stay energized after the module switches off, so the compressor keeps running and can ice the evaporator; a low-side driver instead shuts down and the clutch never engages. No manufacturer documents P2CFE publicly. Ford, which drives the clutch from a body module, publishes only P2CFC and P2CFD; its SSM 53061 notes that voltage remaining on the field coil circuit when not commanded is no reason to replace that module, which shows how such a high reading is assessed. The relay counterpart P0647 is described for the 2011 Saab 9-5 as a short to voltage. CARB requires monitoring of A/C components where they alter engine control.

Likely causes

Clutch control wire shorted to a battery-powered circuit
Output stage in the module stuck switched on
Moisture bridging pins in the compressor or module connector

Symptoms

  • Compressor runs even with A/C switched off
  • Iced evaporator, weak airflow after a while
  • Alternatively no cooling at all if the driver shuts down

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–600
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

ac clutchwiring harnessbody control module

Related codes

P2CFCP2CFDP2CFFP0647

References: static.nhtsa.gov, saabwisonline.com, law.cornell.edu.