Network, generic

U026B Lost Communication With Image Processing Sensor G

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Letter G, too, is visible only through GM: U026B appears in the active safety controller of Escalades from 2015 fitted with the Y66 assistance package, always grouped with U0265, U0268, U0269, U026A, U026C and U0075, and GM does not say which radar or camera G is. The grouping is itself the diagnostic hint. U0075 means that an entire communication bus has gone off, so if it shows up with several sensor codes, a shared cause such as supply, a short on the bus or harness damage is far more likely than a faulty sensor G. A lone U026B without its neighbours instead points to that module, its plug or its own feed. The earliest bulletins of 2015 and 2016 already list exactly this set (PIT5441, PIT5487A). The assistant using sensor G stays off; no MIL.

Likely causes

Common cause on the object detection bus or its supply when several codes appear
Plug or fuse of sensor G when the code appears alone
Faulty scan tool cable producing false codes
Sensor G internally faulty

Symptoms

  • Driver assistance or object detection service message
  • Code alone or together with U0075 and other sensor codes

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–900
Time0.3–4 h

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

Parts involved

image processing sensor gvehicle bus wiring

Related codes

U056CU026CU0268U0075

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