U0187
Lost Communication With Digital Disc Player/Changer Module A
Communication network (CAN bus)
Generic OBD-II
Low
What it means
U0187 means the network has lost communication with digital disc player/changer module A, part of the entertainment system. Drivability and safety systems are unaffected — the only impact is that CD/disc playback stops working and the module may drop off the audio source list. It usually traces to a power/ground loss, a blown fuse, a wiring or connector fault, or a failed disc module.
Low
Can I keep driving? Yes — this is an entertainment (disc player) module; the car drives normally and only the CD/disc playback feature is affected.
Common symptoms
What you'll notice
- Disc player/changer unresponsive or missing from the audio source menu
- CD/disc audio won't play or the changer won't load discs
- Head unit reports the disc module as unavailable
- Other modules logging lost-communication codes for the disc player module
Common causes
Most likely first
- Loss of power or ground to the disc player/changer moduleLikely
- Wiring or connector fault at the module (opens, corrosion, damage)Common
- Blown fuse for the entertainment circuitCommon
- CAN/infotainment bus wiring fault on the branch feeding the moduleLess often
- Failed disc player/changer moduleLess often
How to diagnose & fix
Work through it in order
- Scan all modules to confirm the disc player/changer module is the one offline.
- Check the fuse, power, and ground for the module.
- Inspect the module wiring and connector for damage or corrosion.
- Test the infotainment bus continuity between the module and the head unit/network.
- If supply and wiring are good, the module is likely failed — replace and configure as needed, then re-test.
FAQ
Quick answers
Is it safe to drive with U0187?+
Yes. This affects only the disc player, so the engine, brakes, and safety systems are unaffected. It's purely a lost entertainment feature.
Can I just clear U0187?+
It clears, but returns if there's a wiring, power, or module fault. Since it's a comfort feature you can prioritize it low, but the disc player won't work until the cause is fixed.
Related codes
Often seen with U0187
Read & clear U0187 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX