U0188Lost Communication With Digital Disc Player/Changer Module B
- Generic OBD-II code · Network
- How the car detects it
- U0188 means the second networked disc player or changer, module B, no longer answers. Disc changers hold several CDs or DVDs and were often mounted apart from the radio, in the dash, a console or the boot, and linked to the infotainment bus. Receiving units set a lost-communication code once the expected periodic message of a node is missing, as GM's U0100-U02FF procedure explains for all such codes. No manufacturer documents U0188 publicly; GM's U-code list has no disc player entries at all. U0187 names player A, U0189 and U0190 players C and D. Many newer cars have no disc drive, so a stray entry can also come from wrong coding. Only playback from that unit is lost; no MIL.
- What you may notice
- Disc source B missing or not selectable
- Discs not ejected or not played
- Code stored in the radio or head unit
- Likely causes
- LikelyDisc unit B without power or ground
- PossibleBus or connector to the changer (often in boot or console) damaged
- RareUnit removed or vehicle coded for a device not fitted
- RareDisc player/changer B faulty
- Repair
- Easy · Often possible to do yourself.Typical cost: €0 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.