U0494Invalid Data Received From Digital Audio Control Module A
- Generic OBD-II code · Network
- How the car detects it
- 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.
- What you may notice
- Satellite or digital radio channels missing or showing errors
- Analogue radio and other sources unaffected
- Likely causes
- PossibleReceiver software or activation state producing unexpected values
- PossibleSupply, ground or bus fault at the receiver's connector
- RareDigital radio receiver internally defective
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.