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.
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.
Related codes
Often seen with U0155
Read & clear U0155 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