Semi-Truck Dashboard Warning Lights Stuck On | UpFix

Why Are Dashboard Warning Lights Staying On After Repairs?

It’s frustrating to fix a mechanical problem only for the warning light to remain on. Sometimes, the issue isn’t in the system itself—it’s in the instrument cluster.

The cluster receives diagnostic signals from the ECM and ABS module. When internal components degrade, it can store “ghost” fault signals, keeping lights illuminated even after repairs are made.

Common Warning Light Issues

• ABS or DEF light stays on with no active code

• Check engine light flickers or won’t reset

• Air pressure warning active despite normal readings

• Cluster communication error with ECM

How UpFix Repairs the Issue

UpFix tests your cluster’s logic board and communication circuits. We replace failed processors and rebuild CAN network lines to ensure accurate signal flow. After repair, all warning lights function exactly as intended—no more false faults.

Why Choose Repair

Buying a replacement cluster doesn’t guarantee resolution because stored logic errors may transfer. UpFix repairs and tests your original board under live communication simulation for guaranteed accuracy.

Supported Models

Freightliner Cascadia, Kenworth T680, Peterbilt 579, Volvo VNL, International ProStar and others.

Get your truck back on the road and keep your costs low.
Send your part to UpFix for professional testing and repair.
We’ll restore it to like-new condition, save you up to 80% compared to buying new, and make it plug-and-play ready when returned.