U0155: Lost Communication With Instrument Panel Cluster
Key takeaways
- U0155 means a module on the car's data network stopped receiving messages from the instrument panel cluster, the computer behind your gauges.
- The car usually drives normally, but dead or flickering gauges mean you can't see speed or warning lights, so fix it soon.
- Most fixes are electrical and cheap: a weak battery, loose terminals, a bad ground, a blown fuse or a connector come before the cluster itself.
- GM bulletins name U0155 on many 2021–2024 Chevrolet, Buick and GMC models, with repair information for instrument cluster concerns.
- A replaced and programmed instrument cluster runs about $500–$1,500, so the power, ground and network should be tested first.
What U0155 means
Other computers in your car stopped hearing from the instrument cluster, the module that runs your gauges and warning lights. Scanners call it “Lost Communication With Instrument Panel Cluster (IPC) Control Module.”
Modern cars link their computers over a data network, usually called the CAN bus. The cluster both receives data (speed, engine temperature, warnings) and sends messages to other modules. When those messages stop for longer than allowed, the module that noticed stores U0155. It’s often stored in the body, engine or gateway module, not in the cluster itself.
The code says messages went missing, not why. The cluster may have lost power or ground, a network wire or connector may be faulty, the software may have a known bug, or the cluster may have failed.
Is it safe to drive?
Yes, usually, if the car starts and runs normally. The cluster doesn’t run the engine, so the car drives the same. The problem is what you can’t see: when the cluster drops off the network, the speedometer, fuel gauge and warning lights can freeze, flicker or go dark.
What changes the answer: if the gauges are dark, you have no warning lights for oil pressure, temperature or brakes, so drive only as far as a shop, in daylight. If the car won’t crank or start, or several warning lights come on with other U codes, don’t rely on it; on some cars the cluster is part of the start authorization, and a Jeep bulletin ties U0155 with other lost-communication codes to a no-crank.
Causes, ranked
| Cause | How you confirm it | Typical cost (US independent shop, 2026) |
|---|---|---|
| Weak battery or low voltage during cranking | Battery load test; code appeared on a cold start, after a jump or a battery change | $0 if it only needed a charge; $150–$350 for a battery |
| Loose or corroded battery terminals or grounds | Voltage drop test across cables and ground straps; crust at the posts | $0–$120 |
| Blown fuse feeding the cluster | No power or ground at the cluster connector with the key on | $0–$50 |
| Loose, wet or damaged connector or network wiring | Network resistance at the diagnostic port (about 60 ohms on most cars, battery disconnected); inspect the cluster plug | $100–$250 |
| Cluster software needing an update | A bulletin covers your make, model and year | $100–$200, often $0 under warranty |
| Failed instrument cluster | Power, ground and network good at the cluster, still no communication | $500–$1,500 replaced and programmed |
What to check first
- Test the battery and charging system. A healthy battery rests around 12.6 volts; running voltage usually sits between about 13.5 and 14.7. The battery keeps dying guide walks through it.
- Clean and tighten the terminals and grounds, including the body grounds behind the dash on some vehicles.
- Check the cluster’s fuses. The owner’s manual or the fuse box lid names them.
- Scan every module. U0155 in one module points at that module’s wiring; U0155 in several points at the cluster’s own power, ground or connector.
- Ask about bulletins before a cluster is ordered. The pattern is GM: bulletins give repair information for instrument cluster concerns and U0155 on 2021–2024 Malibu, Blazer, Camaro, Traverse, Enclave, Acadia and Terrain. A Ford bulletin for 2023 F-Super Duty says U0155 and other U codes can set during a self-test without a real fault, and a Jeep bulletin covers a 2022–2024 Grand Wagoneer no-crank with U0155 among several lost-communication codes.
- Clear it and drive if the car runs normally. If it doesn’t come back after a week, it was likely a voltage dip.
24 owner complaints filed with NHTSA mention U0155, spread across 22 models; the Ram 1500 has the most with 3. These are owner reports, not confirmed defects.
What it costs
The cheap outcome is a battery charge, a cleaned terminal or a fuse, $0–$120. The common outcome is a new battery, a connector or wiring repair, or a software update, about $100–$350. The expensive outcome is a replacement cluster at $500–$1,500 with programming, and it should come last, after the network has been tested. If the car won’t crank but has power, start with that guide.
Related codes
U0155 often appears with other lost-communication codes: U0100 for the engine computer, U0140 for the body computer, U0151 for the airbag module and U0164 for climate control. Several at once usually means a shared power, ground or network problem, not several failed modules.
What owners report to NHTSA
24 complaints filed with NHTSA mention U0155, 24 of them since 2015, across 22 different models. The component owners most often filed it under: electrical system.
Most-reported models
| Vehicle | Complaints | Model years reported |
|---|---|---|
| RAM 1500 | 3 | 2016, 2017, 2025 |
Manufacturer service bulletins that name U0155
76 technical service bulletins and manufacturer communications filed with NHTSA mention U0155, from 12 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:
- JEEP GRAND WAGONEER (2022, 2023, 2024), bulletin 10247432: Vehicle is a no crank/no start with the following DTCs, as well as a no crank/no start condition: U0164, U0140, U0151, U0155
- CHEVROLET MALIBU (2021, 2023, 2024, 2022), bulletin 11000151: This service bulletin provides repair information to correct various functional concerns of the Instrument Cluster and DTC U0155.
- BUICK ENCLAVE (2022, 2023, 2024), bulletin 11000151: This service bulletin provides repair information to correct various functional concerns of the Instrument Cluster and DTC U0155.
- GMC ACADIA (2021, 2023, 2024, 2022), bulletin 11000151: This service bulletin provides repair information to correct various functional concerns of the Instrument Cluster and DTC U0155.
- CHEVROLET BLAZER (2021, 2022, 2023), bulletin 10225661: This service bulletin provides repair information to correct various functional concerns of the Instrument Cluster and DTC U0155.
- CHEVROLET CAMARO (2021, 2022, 2023), bulletin 10225728: This service bulletin provides repair information to correct a customer concern of Instrument Cluster Concerns and/or DTC U0155 Set.
Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.
Frequently asked questions
What are the symptoms of U0155?
Gauges that drop to zero, freeze or sweep, a dark or flickering dash, warning lights that come on together, or a chime that won't stop. Sometimes there are no symptoms and the code sits in another module from an old voltage dip.
Can a bad battery cause U0155?
Yes, and it's one of the most common reasons. When voltage sags, especially during cranking, modules can drop off the network and log lost-communication codes. Test the battery and clean the terminals before anything else.
Is it safe to drive with U0155?
Usually, if the car starts and drives normally. The risk is losing your speedometer, fuel gauge and warning lights. If the gauges are dark, drive only as far as a shop, in daylight, and watch your speed.
Does U0155 mean I need a new instrument cluster?
Not usually. The code says messages stopped arriving, not why. Power, ground, a fuse, a wet connector or software can all cause it. The cluster is replaced only after power, ground and network wiring test good at its connector.