U0161
Lost Communication With Compass Module
Communication network (compass display)
Generic OBD-II
Low
What it means
U0161 means the network has lost communication with the compass module, which supplies the heading shown on the mirror or dash display. With it offline the compass simply goes blank or stops updating. It has no effect on how the vehicle runs, steers, or brakes, so it's a low-priority fix once you've confirmed no other communication faults are present.
Low
Can I keep driving? Yes — only the compass display is affected. The car drives normally in every other way.
Common symptoms
What you'll notice
- Compass heading blank, frozen, or missing from the display
- Compass module unreachable when scanned
- Possibly a general network warning if other U-codes are present
- No effect on how the engine or brakes drive
Common causes
Most likely first
- Open, shorted, or chafed wiring to the compass moduleLikely
- Corroded or loose connector at the module (often in the mirror or headliner)Common
- Blown fuse or lost power/ground to the moduleCommon
- Failed compass moduleLess often
- Bus fault preventing the module from reportingLess often
How to diagnose & fix
Work through it in order
- Scan all modules and confirm the compass module is offline.
- Check the module's power, ground, and fuse feeds.
- Inspect the wiring and connector at the module for damage or corrosion.
- Test the CAN bus lines to the module for open or short.
- If wiring and power are good, replace the compass module, clear the code, and confirm it reports.
FAQ
Quick answers
Is it safe to drive with U0161?+
Yes. Only the compass display is lost — nothing about how the car drives, steers, or brakes is affected.
Can I just clear U0161?+
It returns while the module stays offline, but since only the compass is affected, it's a low-priority fix.
Related codes
Often seen with U0161
Read & clear U0161 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