Network, generic

U0497 Invalid Data Received From Entertainment Control Module - Rear A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0497 concerns rear entertainment control module A, which lets people in the back choose media, listen on headphones and watch their own screens independently of the front. It is set when that unit's data reach the head unit or gateway but fail the plausibility, counter or checksum test; U0196 means contact is lost. In the Saab code lists GM published for 2011, that partner is the rear audio control module. Large GM SUVs with the U42 entertainment package show how faults look in practice: PIC6003A (2015 Tahoe, Suburban, Yukon) traced a rolling picture after switching to rear video to the centre stack, and 17-NA-378 (2017) swapped the media player for sound out of step with the film. No manufacturer documents U0497 itself. Rear screens, headphones or controls misbehave; no MIL.

Likely causes

Software of the rear unit or the head unit mishandling shared video or audio data
Internal fault of the rear entertainment unit or its media player
Supply, ground or bus connection fault at the rear unit

Symptoms

  • Rear screens show a rolling or missing picture
  • Rear headphones or controls without function
  • Front audio system usually keeps working

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–900
Time0.5–2.5 h

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

Parts involved

rear entertainment module a

Related codes

U0196U0485U0491

References: saabwisonline.com, static.nhtsa.gov, static.nhtsa.gov.