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U0230 Lost Communication With Rear Gate Module

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0230 means the rear gate module, which runs a powered liftgate or tailgate with its drive, latch, cinch motor and pinch detection, has dropped off the bus. Toyota bulletin T-SB-0038-15 (Highlander and Highlander HV 2008-2013) names U0230 together with B2222 when the power back door reverses at the end of its travel or clunks at the striker, and gives a hinge and hatch inspection and repair. GM PI PIT5422 (Equinox, Terrain 2010-2015) blames moisture and corroded terminals in connector X901, high on the liftgate, for U0230 and other low speed LAN codes. A Chrysler STAR case (S1908000143) found it as Power Liftgate Module code beside chafed wiring at the right B-pillar. Saab lists the slot as Liftgate Control Module. Power operation of the gate fails; no MIL.

Likely causes

Water or corrosion in the harness connector at the liftgate
Wires broken in the flexing harness between body and gate
Bus wiring chafed along the body (seat or pillar area)
Rear gate module faulty

Symptoms

  • Power liftgate does not open or close electrically
  • Gate reverses or stops during power closing
  • Several lost communication codes stored at once

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–800
Time0.5–3 h

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

Parts involved

rear gate modulecan bus

Related codes

U0531U0140U0155

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, saabwisonline.com.