U0161

Lost Communication With Compass Module

Q: 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.

Q: 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.

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.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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.

Read & clear U0161 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX