U0202
Lost Communication With Door Control Module D
Door module network
Generic OBD-II
Low
What it means
U0202 means the network has lost communication with door control module D, which runs one door's powered features such as the windows, locks, and mirror. Losing it leaves those functions dead but does not affect the engine or safety systems. The most common cause is a broken wire in the flexible harness at the door hinge, along with connector faults, power/ground problems, or a failed module.
Low
Can I keep driving? Yes — this affects one door's powered features such as windows, locks, and mirror; the car drives and runs normally.
Common symptoms
What you'll notice
- One door's power windows, locks, or mirror not working
- Door control module unresponsive when scanned
- Possible chime or message-center notice
- No engine or safety-system effect
Common causes
Most likely first
- Wiring break in the door harness, often at the flexible door-jamb loomLikely
- Poor power or ground to the door moduleCommon
- CAN bus fault interrupting the moduleCommon
- Failed door control moduleLess often
How to diagnose & fix
Work through it in order
- Scan for related U-codes and confirm which door module is offline.
- Flex-test and inspect the door-jamb wiring harness for broken wires.
- Check the module's power, ground, and connector.
- Confirm bus communication to the module.
- Repair the wiring or replace the door module, clear codes, and retest.
FAQ
Quick answers
Is it safe to drive with U0202?+
Yes. This affects the powered features of one door and has no impact on how the vehicle drives or on any safety system.
Can I just clear U0202?+
It returns until the module communicates again. A very common cause is broken wiring in the flexible loom at the door hinge, which flexes every time the door opens, so inspect there first.
Related codes
Often seen with U0202
Read & clear U0202 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