U0158
Lost Communication With Head Up Display
Communication / displays
Generic OBD-II
Low
What it means
U0158 sets when a module loses communication with the head-up display (HUD), the projector that shows speed and other info on the windshield. It's a convenience feature, so the car drives normally and the regular gauges still work — you simply lose the HUD until the fault is repaired.
Low
Can I keep driving? Yes — only the head-up display is affected; all driving systems and the normal instrument cluster keep working.
Common symptoms
What you'll notice
- Head-up display blank or not projecting
- HUD unreachable by a scan tool
- No response from the HUD adjustment controls
- Possible message about the display system
Common causes
Most likely first
- Loss of power or ground to the HUD unitLikely
- Blown fuse feeding the HUDCommon
- Damaged wiring or connector at the displayCommon
- CAN bus fault between the HUD and the cluster/body moduleLess often
- Failed head-up display moduleLess often
How to diagnose & fix
Work through it in order
- Check the fuse and the power/ground for the head-up display.
- Scan for the code and confirm the HUD doesn't respond.
- Inspect the HUD connector and wiring for damage or corrosion.
- Check the bus wiring between the HUD and the module that commands it.
- Replace the HUD unit if wiring and power are good, then clear and re-test.
FAQ
Quick answers
Is it safe to drive with U0158?+
Yes. The HUD is a convenience display; losing it doesn't affect how the car drives or the normal gauges.
Can I just clear U0158?+
You can, but it returns until the HUD's power, wiring, or the unit itself is repaired.
Related codes
Often seen with U0158
Read & clear U0158 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