Network, generic

U0495 Invalid Data Received From Digital Audio Control Module B

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0495 is the invalid-data code for a second digital audio unit, module B. Where slot A is used at all, it tends to be the digital or satellite radio receiver, as in GM's Saab lists; for B no public code list or bulletin names a concrete device, and no maker documents U0495. The partner U0194 does appear in GM bulletin 15-NA-004 (2013-2016 Acadia), but only as one of eleven lost-contact codes traced to a low-speed LAN lead crushed by the rear climate duct in the headliner, which reveals nothing about module B itself. A stored U0495 should therefore first be checked against the vehicle's own module list, then software levels and the bus link. At worst one digital audio source is missing; no MIL.

Likely causes

Coding or software mismatch about which device occupies slot B
Damaged or pinched bus wiring disturbing several modules
Internal fault of digital audio module B

Symptoms

  • One digital audio source unavailable
  • Often stored together with other network codes

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–600
Time0.5–2.5 h

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

Parts involved

digital audio module b

Related codes

U0194U0494U0193

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