U0205moderate severityNetwork
Lost Communication with Horn Control Module
on 2010 Mitsubishi Eclipse 2.4L I4 · FWD
What this code means
Cannot communicate with the horn control module on vehicles with electronic horn management.
Symptoms
- Horn not sounding
- Horn intermittent
- Panic alarm no horn output
- Theft alarm no horn
Common causes
- Horn relay module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Horn assembly failure
Diagnostic steps
- Check horn fuse
- Test horn relay
- Check CAN wiring to horn module
- Test horn assembly directly
- Inspect steering wheel horn switch
Repair notes
Check fuse and horn relay first. Test horn directly with jumper wire to confirm horn works.
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Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus