U0566Invalid Data Received From Image Processing Sensor A
- Generic OBD-II code · Network
- How the car detects it
- 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.
- What you may notice
- Service Driver Assist or Steering Assist Reduced message
- Adaptive cruise and automatic braking functions unavailable
- MIL possible only through accompanying brake-module code P25A2
- Likely causes
- LikelyWindshield camera software resets or sends faulty protection values (GM remedy is reprogramming)
- PossibleFront camera internally faulty when the fault recurs often (GM then replaces it)
- RareSupply voltage dips or bus disturbances during start
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.