U0155

Lost Communication With Instrument Panel Cluster (IPC) Control Module

Communication / network Generic OBD-II High

What it means

U0155 means the engine or body computer has lost communication with the instrument panel cluster (the gauge cluster) over the vehicle's data network. When the cluster stops responding, your speedometer, fuel gauge, and warning lights can go blank or erratic. It's usually a wiring, power/ground, or module fault rather than an engine problem.

High

Can I keep driving? The car may still run, but the instrument cluster can go blank or erratic — no speedometer, fuel gauge, or warning lights — which is unsafe, so treat it as urgent.

Real-world scan data

Seen in

4,749

scans in the past year

Found in

0.8%

of scans

1.3%

of scans that found faults

Appears alongside · share of U0155 scans

U0100in 37.9% of scans

U0121in 24.9% of scans

U0140in 23.8% of scans

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

Speedometer, tachometer, or fuel/temperature gauges dead or erratic
Warning lights stuck on, flickering, or all dark
Odometer, trip, or cluster displays blank
Other modules logging 'lost communication' codes at the same time

Common causes

Most likely first

Blown fuse or lost power/ground to the instrument clusterLikely
Corroded or loose connector at the clusterCommon
Damaged CAN bus wiring between the cluster and other modulesCommon
Low battery or charging voltage disrupting the data busLess often
Failed instrument panel cluster moduleLess often

How to diagnose & fix

Work through it in order

Scan every module and note all stored U-codes — a bus-wide pattern points to wiring, a lone U0155 points to the cluster.
Check the cluster's power and ground fuses, and test for battery voltage and a good ground at the cluster connector.
Inspect the cluster connector and CAN bus wiring for corrosion, backed-out pins, or damage.
Confirm battery and charging voltage are healthy — low voltage can knock modules off the bus.
If power, ground, and bus wiring are all good, suspect the cluster module itself.

FAQ

Quick answers

Is it safe to drive with U0155?+

It's risky. The engine may run fine, but driving without a working speedometer or warning lights is unsafe and may be illegal — get it fixed promptly.

Can I just clear U0155?+

Clearing won't help if the cluster still can't talk to the network; the code returns as soon as the fault reappears. Fix the power/wiring or the cluster first.

Read & clear U0155 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