Network, generic

U026C Lost Communication With Image Processing Sensor H

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U026C rounds off the GM object detection group reported by the Escalade's active safety module; GM leaves open which sensor letter H stands for. The PIT5487 series, revised from 2016 up to version F in 2020 for model years 2015–2020, shows how the code turns up next to lighting faults. Apart from camera, park assist, adaptive cruise and driver assist messages, the turn signals may flash fast and lamp body codes such as B2575 or B2605 can join, because one chafed bumper harness feeds both lamps and sensors. Such a mix of lighting and sensor faults at the front corner is the cue to inspect that harness before replacing any module. Assistance that uses sensor H stays unavailable until communication returns; no MIL.

Likely causes

Chafed bumper harness supplying both lamps and sensors
Shared fuse blown by a short in the front wiring
Connector of sensor H loose or corroded
Sensor H internally faulty

Symptoms

  • Turn signal flashes fast, front lamps partly dead
  • Lamp body codes stored together with sensor U-codes
  • Service Driver Assist or surround camera message

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–800
Time1–4 h

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

Parts involved

image processing sensor hvehicle bus wiring

Related codes

U056DU026BU0268U0075

References: static.nhtsa.gov, static.nhtsa.gov.