Network, generic

U056A Invalid Data Received From Image Processing Sensor E

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U056A is the invalid-data code for image processing sensor E: the module still talks, but the receiver rejects what it says. No brand documents U056A itself. GM lists the partner U0269 among codes held by the active safety controller of many 2013–2018 models with driver-assist packages, among them Escalade, ATS, CT6, Malibu, Volt and Acadia. These sensors share a separate object detection bus, wired to pins 3 and 11 of the diagnostic connector. GM warned that a worn scan-tool interface or cable on exactly those pins produces false U-codes and blocks contact with the radars and front camera; a loopback adapter or a known-good vehicle proves the tool. Rule out the tester before chasing sensor E. No MIL.

Likely causes

Faulty diagnostic interface or cable on the object detection bus pins (false codes)
Fault on the dedicated object detection bus wiring
Sensor E software fault or internal defect

Symptoms

  • Object detection or Service Active Safety message
  • Scan tool cannot reach radars and front camera
  • Code returns only when one particular tester is connected

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–1,200
Time0.3–3 h

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

Parts involved

image processing sensor e

Related codes

U0269U0569U056BU0075

References: static.nhtsa.gov, static.nhtsa.gov, en.wikipedia.org.