U0489 code meaning
Invalid Data Received From Digital Disc Player/Changer Module B
What U0489 means
U0489 refers to disc player/changer module B, a second drive in the same network, such as a changer added to a radio that already plays CDs or a DVD unit for the rear seats. The receiver still hears it but rejects the content, whereas loss of contact is U0188; drive A has U0488. Two-drive layouts did exist at GM: the 2004-2009 Cadillac XLR paired its navigation radio with a separate CD changer, and GM PIC4858A notes that a replacement changer installed with its shipping pin still in place refuses discs and shows a CD error. No maker states which drive counts as B, and none documents U0489. Discs in that unit cannot be played, while radio and other sources work; no MIL.
U0489 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0489
- Second disc drive does not accept or play discs
- Disc error message on the display
Common causes of U0489
- PossibleReplacement changer fitted without removing the transport lock
- PossibleMechanical or internal fault in the changer
- Less likelyVehicle coded for a second drive that is missing or of another type
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Disc changer module b
What each part of U0489 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 89 | The exact fault in that area. |
What to do next
- Note U0489 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 U0489
What does U0489 mean?
U0489 means "Invalid Data Received From Digital Disc Player/Changer Module B". U0489 refers to disc player/changer module B, a second drive in the same network, such as a changer added to a radio that already plays CDs or a DVD unit for the rear seats. It is a generic code, so it means the same on every make.
Is it safe to drive with U0489?
U0489 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will U0489 fail an emissions test?
U0489 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 U0489 to fix?
Difficulty: medium. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will U0489 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.