Network, generic

U0494 Invalid Data Received From Digital Audio Control Module A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0494 is stored when digital audio control module A still communicates but supplies data the receiver will not accept. In GM's 2011 Saab 9-5 and 9-4X lists the matching lost-contact code U0193 belongs to the digital radio receiver, at that time the separate XM satellite tuner. GM bulletin PIT5413 (2015 Enclave, Traverse, Acadia) shows such a receiver as a module of its own with a 16-pin power and GMLAN connector, which must be checked for supply, ground and bus before a replacement is authorised. Other makers may fill slot A with a different device, and none documents U0494 itself. Typical result: satellite or digital channels drop out or show errors while FM keeps playing. No MIL; U0495 is module B.

Likely causes

Receiver software or activation state producing unexpected values
Supply, ground or bus fault at the receiver's connector
Digital radio receiver internally defective

Symptoms

  • Satellite or digital radio channels missing or showing errors
  • Analogue radio and other sources unaffected

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–700
Time0.5–2 h

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

Parts involved

digital audio module a

Related codes

U0193U0495U0496

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