Network, generic

U0488 Invalid Data Received From Digital Disc Player/Changer Module A

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

U0488 is logged when the first networked disc drive, module A, still reports on the bus but its data fail the receiver's checks; U0187 would mean the drive is silent, while U0489, U048A and U0491 cover drives B to D. Many GM vehicles of 2013-2015 carried such a separate media disc player with its own fuse: bulletin PIT5344B (ATS, Escalade, Silverado, Tahoe and others) told technicians to cycle that fuse when CD playback stopped and to replace the player only if power and ground tested fine. In optical MOST networks a drive of this kind is a ring member that streams its audio to the head unit. No manufacturer documents U0488 itself. The radio then refuses disc playback while other sources keep working; no MIL.

Likely causes

Disc player hung internally, cleared by a power cycle
Poor supply or ground at the disc player
Disc player itself defective

Symptoms

  • CD or DVD playback unavailable
  • Other audio sources keep working

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–500
Time0.2–1.5 h

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

Parts involved

disc changer module a

Related codes

U0187U0489U048AU0491

References: static.nhtsa.gov, en.wikipedia.org.