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U0126 Lost Communication With Steering Angle Sensor Module

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0126 means the steering wheel angle sensor, usually mounted on the steering column, is no longer heard on the bus. ESC needs this value to know the path the driver intends. Mitsubishi's 2019 Outlander PHEV sets U0126 in the PHEV-ECU when it loses its CAN link to the wheel-angle sensor and demands calibration after a sensor swap. Mercedes reports U012600 with check-engine lamp after remote start, traced to software and the column module (LI27.00-P-073106). GM PIT5755 warns that some 2020 Silverado HD brake controllers log the same fault as U0131. Saab's list uses symptom bytes 71/72/74/5A. U0428 covers invalid angle data. Expect ESC warnings, sometimes a MIL.

Likely causes

Loose or damaged connector or clock-spring harness at the steering column
Power or ground of the steering angle sensor missing
Module software reporting the fault wrongly or after remote start (update)
Steering angle sensor faulty; recalibration needed after replacement

Symptoms

  • ESC and traction lamps on, stability control inactive
  • Check engine lamp on some models
  • Lane or park assist functions unavailable

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–900
Time0.5–3 h

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

Parts involved

steering angle sensorcan bus wiring

Related codes

U0328U0428U0131U0122U0125

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