Network, generic

U011D Lost Communication With All Wheel Drive Control Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

U011D signals a lost all-wheel-drive control module. In contrast to a single coupling controller (U0114) or a transfer case module (U0102), this unit manages an entire on-demand AWD system, deciding when and how much torque goes to the secondary axle, which in some cars is driven by its own electric motor. It draws wheel speed, steering and torque data from the bus and reports its state to stability control. No manufacturer documents U011D publicly; Stellantis, for one, files the case under U0102, which its Jeep Wrangler bulletin 23-033-25 calls Transfer Case Control Module/AWD. Typical consequences are an AWD warning lamp and drive on one axle only; emissions are not affected, so a MIL is not expected.

Likely causes

AWD module without power or ground
Water or corrosion at the module connector near the rear axle
Chafed or open CAN wiring to the module
All-wheel-drive control module internally faulty

Symptoms

  • AWD warning lamp or message
  • Drive on one axle only
  • Stability control may also show a warning

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–1,500
Time0.5–4 h

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

Parts involved

awd modulecan bus wiring

Related codes

U0114U0102U0414

References: static.nhtsa.gov, en.wikipedia.org.