U0155 on Chrysler: How to Diagnose & Fix
Lost Communication with Instrument Cluster
1 Chrysler model · 1 documented issue · $100-$800 repair
U0155 on Chrysler by model: symptoms, diagnosis and fix
The security (alarm) module and central locking pump located in the trunk area suffer from water intrusion causing corrosion of circuits. This triggers random electrical faults including lighting, power window, and central locking failures.
Common Symptoms
- Random electrical faults
- Lights malfunction
- Central locking fails
- Multiple warning lights on dash
How to Fix
Remove the security module and central locking pump, clean circuit boards of corrosion, and reseal the housings. Identify and seal the water intrusion point (often the fuel-door drain hose, fuel-filler gasket, tail-light seals, trunk gasket or rear window seal). Severe corrosion requires module replacement.
Sources for this issue (4)
U0155 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does U0155 mean on a Chrysler?
U0155 stands for "Lost Communication with Instrument Cluster." This is a network communication code meaning a control module (usually the engine or body computer) has lost communication with the instrument cluster over the vehicle's data bus. Modern vehicles share information between modules over a network (such as CAN), and the cluster both displays data and relays messages. When messages from the cluster stop arriving, this code sets. You may see warning lights, dead or erratic gauges, missing displays, or other modules acting up. It usually points to wiring, power/ground, or the cluster itself rather than the engine. On Chrysler it is documented across 1 model: Crossfire.
What are the most common causes of U0155?
The most common causes of U0155 are: Faulty instrument cluster, Loss of power or ground to the cluster, Damaged or corroded CAN bus wiring, Loose or corroded connectors at the cluster, Blown fuse feeding the cluster, Short or open on the communication bus, A different failed module dragging down the bus. The specific cause varies by vehicle.
How much does it cost to fix U0155 on a Chrysler?
Published repair estimates on Chrysler range from $100 to $800 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.