Network, generic

U0193 Lost Communication With Digital Audio Control Module A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0193 reports that digital audio control module A no longer sends its messages. Makers fill this slot differently. GM calls it Lost Communication With Digital Radio Receiver Control Module in the Saab 9-5 (2010-2011) U-code list, i.e. the separate receiver for digital or satellite radio, and its 2017-2021 GMC Acadia and Cadillac XT5 bulletin lists U0193 among codes caused by harness chafing or water in the BCM. Chrysler's 2006-2010 Jeep code list uses U0193 for a traffic information receiver module. GM's logic: a supervised periodic message is missing at 9-16 V. U0194 is module B, U0184 the radio, U0186 the amplifier. Digital radio or traffic data drops out; no MIL.

Likely causes

Digital receiver module without power or ground
Chafed harness or water in connectors (GM Acadia/XT5)
Bus wire or connector to the receiver damaged
Digital audio module A faulty

Symptoms

  • Digital, satellite radio or traffic data unavailable
  • Radio shows no signal for the digital source
  • Code stored in radio and other modules

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–600
Time0.5–2.5 h

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

Parts involved

digital audio control modulecan bus wiring

Related codes

U0184U0186U0194U0195

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