U0190 code meaning
Lost Communication With Digital Disc Player/Changer Module D
What U0190 means
U0190 is the last code in the J2012 disc player block and names module D, a fourth networked drive or changer. When that unit goes silent, the modules expecting its periodic traffic store U0190; GM's procedure for U0100-U02FF adds that a code stored only in history after a flat battery or a module disconnected with the bus awake is not a reason to replace parts. No manufacturer documents U0190 publicly, and a fourth disc drive is very rare in practice, so the code is unusual. A changer is a mechanical unit that loads discs from a magazine, which makes power supply and mounting location the first checks. U0187 to U0189 cover modules A to C. Only disc playback from D is lost; no MIL.
U0190 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0190
- Disc source D missing
- Magazine not loaded or ejected
- Code stored in the head unit
Common causes of U0190
- Most likelyDisc unit D without power or ground
- PossibleHistory entry after flat battery or unit unplugged with bus awake
- PossibleConnector or bus line to module D damaged
- Less likelyDisc player/changer D faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Disc player moduleCAN bus wiring
What each part of U0190 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 90 | The exact fault in that area. |
What to do next
- Note U0190 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0190
What does U0190 mean?
U0190 means "Lost Communication With Digital Disc Player/Changer Module D". U0190 is the last code in the J2012 disc player block and names module D, a fourth networked drive or changer. It is a generic code, so it means the same on every make.
Is it safe to drive with U0190?
U0190 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0190 fail an emissions test?
U0190 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is U0190 to fix?
Difficulty: easy. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will U0190 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.