U0155 on Lexus: How to Diagnose & Fix
Lost Communication with Instrument Cluster
1 Lexus model · 1 documented issue
U0155 on Lexus by model: symptoms, diagnosis and fix
Owners of the current-generation LX have reported the center infotainment display freezing, rebooting, losing audio functions, or going black temporarily. Complaints and forum posts describe navigation, camera, and climate-related interface interruptions, sometimes resolved only by an ignition cycle or software update. The problem appears tied to head-unit software instability rather than a single hardware defect in many cases.
Common Symptoms
- Center screen freezes
- Infotainment system reboots while driving
- Display goes black
- Backup or surround-view camera delayed or unavailable
- Audio stops working
- Climate controls on screen become unresponsive
How to Fix
Confirm software version and check for Lexus multimedia service bulletins or over-the-air/dealer updates. If the issue persists, dealers typically perform head-unit software reprogramming, inspect battery voltage and module communication faults, and replace the display/audio head unit only if updates do not resolve the problem. Owners should record when the failure occurs, especially if wireless phone projection is active.
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 Lexus?
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 Lexus it is documented across 1 model: LX.
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 Lexus?
Repair costs vary widely with the root cause and Lexus model; each issue on this page carries its own estimate where one is published.
Looking for U0155 on a different make?
View U0155 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.