Network, generic

U0566 Invalid Data Received From Image Processing Sensor A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

At GM, image processing sensor A is the front camera behind the windshield; its partner U0265 is called Front View Camera – Windshield in GM bulletins. GM's 2025 OBD tables show how U0566 is detected: the brake module and the EOCM3 driver-assist controller check rolling counters, checksums and message authentication on the camera's frames. EOCM3 sets it when 3 of 4 messages fail within about 3 seconds, the brake module after 3 counter errors in a window of 16, both only at 9–16 V and as Type C without MIL; adaptive cruise is switched off. On 2020 Cadillac CT4 and CT5 a resetting camera set U0566 with U0265 and P25A2, cut driver and steering assist, and P25A2 could light the MIL. Reprogramming the camera came first.

Likely causes

Windshield camera software resets or sends faulty protection values (GM remedy is reprogramming)
Front camera internally faulty when the fault recurs often (GM then replaces it)
Supply voltage dips or bus disturbances during start

Symptoms

  • Service Driver Assist or Steering Assist Reduced message
  • Adaptive cruise and automatic braking functions unavailable
  • MIL possible only through accompanying brake-module code P25A2

Repair estimate

DifficultyHardWorkshop job
Parts and labour€80–1,500
Time0.5–2.5 h

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

Parts involved

image processing sensor a

Related codes

U0265U053BU0567U056B

References: gsi.ext.gm.com, gsi.ext.gm.com, static.nhtsa.gov, static.nhtsa.gov.