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U0114 Lost Communication With Four-Wheel Drive Clutch Control Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

U0114 says the controller of a four-wheel-drive clutch has gone quiet. Such a unit sets how much torque reaches the secondary axle by clamping a multi-plate coupling, as in Haldex-type on-demand drivelines whose later generations carry their own integrated electronics. It needs wheel speeds, engine torque and brake status from the bus and is usually missed by the engine, transmission or ABS controller. Ford's 2014 powertrain code interpretation lists U0114, but no maker publishes timing or lamp logic for it. A transfer case controller has U0102, a complete all-wheel-drive module U011D, invalid clutch data U0414. In practice the car drives on one axle with an AWD warning; engine running and emissions stay unaffected.

Likely causes

Clutch module without power or ground (fuse, connector near the rear axle)
Water or corrosion in the module connector exposed under the car
Chafed or open CAN lines to the rear of the vehicle
Clutch control module internally faulty

Symptoms

  • AWD/4WD warning in the cluster
  • Drive only on the primary axle, wheelspin on slippery roads
  • Possibly stability control warning

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–1,200
Time0.5–4 h

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

Parts involved

awd clutch control modulecan bus wiring

Related codes

U0414U0314U0102U011D

References: performanceparts.ford.com, en.wikipedia.org, en.wikipedia.org.