AutoCodes – Lexus – U0155 Lexus

U0155 Lexus Code - Lost Communication with Instrument Panel Cluster Control Module

Quick Answer

The Controller Area Network (CAN) is a standard bus system in vehicles that enables the connection of automotive devices without the need for a host computer. Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Instrument Panel Cluster Control Module, Instrument Panel Cluster Control Module harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U0155 Lexus indicates Lost Communication with Instrument Panel Cluster Control Module.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Instrument Panel Cluster Control Module, Instrument Panel Cluster Control Module harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 2,982

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 27, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U0155 Lexus Description

The Controller Area Network (CAN) is a standard bus system in vehicles that enables the connection of automotive devices without the need for a host computer. The exchange of operating information and commands among devices is facilitated by pre-programmed information about the required message exchange on the serial data circuits. Communication is carried out using two dedicated wires, known as CAN high and CAN low, with both lines carrying 2.5V when the CAN bus is in idle mode. During the transmission of data bits, the CAN high line increases to 3.75V while the CAN low drops to 1.25V, creating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Instrument Panel Cluster Control Module has not been received.

OBDII Code U0155 Lexus - Lost Communication with Instrument Panel Cluster Control Module - AutoCodes.com — U0155 Lexus Code - Lost Communication with Instrument Panel Cluster Control Module

What does this mean?

What are the Possible Causes of the DTC U0155 Lexus?

Faulty Controller Area Network (CAN) Communication System
Faulty Instrument Panel Cluster Control Module
Instrument Panel Cluster Control Module harness is open or shorted
Instrument Panel Cluster Control Module circuit poor electrical connection

How to Fix the DTC U0155 Lexus?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

When there are problems with the way different systems in a vehicle communicate with each other using a technology called Controller Area Network (CAN) communication, Diagnostic Trouble Codes (DTC) are displayed. These codes can be caused by issues with the main bus or branch of the communication network, or with the Electronic Control Units (ECUs) and sensors that make up the different systems. If you see code for both the CAN communication problems and internal or power source problems at the same time, you should focus on fixing the internal or power source problems first.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0155 Lexus code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U0155 Lexus Code

1. What are the common symptoms of OBDII code U0155 (Lost Communication with Instrument Panel Cluster Control Module) in a Lexus?

- Common symptoms include the instrument cluster not working, warning lights staying on, loss of communication with other modules, and issues with gauges and indicators.

2. What are some possible causes of OBDII code U0155 in a Lexus?

- Possible causes include a faulty instrument panel cluster control module, damaged wiring or connectors, a blown fuse, software issues, or a malfunctioning CAN bus communication network.

3. How can I diagnose OBDII code U0155 in my Lexus?

- Diagnose U0155 by checking for other stored codes, testing the instrument panel cluster control module for communication, inspecting wiring and connectors for damage, verifying CAN bus integrity, and performing a software update if needed.

4. Can I still drive my Lexus with the U0155 code present?

- It is not recommended to drive your Lexus with the U0155 code present, as it can lead to safety risks due to loss of vital information from the instrument cluster.

5. How can I repair OBDII code U0155 in my Lexus?

- Repair options include replacing the faulty instrument panel cluster control module, repairing damaged wiring or connectors, resetting the system, checking and replacing blown fuses, and ensuring a good connection in the CAN bus network.

6. Is it possible to reset or clear the U0155 code without fixing the underlying issue?

- While you can clear the code temporarily, it will likely return until the underlying issue causing the lost communication with the instrument panel cluster control module is addressed.

7. Will disconnecting the battery reset the U0155 code in my Lexus?

- Disconnecting the battery may temporarily clear the code, but if the root cause of the communication issue is not fixed, the code will likely reappear after driving the vehicle.

8. Can a DIY enthusiast fix the U0155 code issue in a Lexus?

- Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to diagnose and repair the U0155 code in a Lexus by following proper diagnostic procedures and using the appropriate repair techniques.

9. How long does it typically take to repair OBDII code U0155 in a Lexus?

- The repair time for U0155 can vary depending on the exact cause of the issue, but it may take anywhere from an hour for simple fixes like replacing a fuse to several hours for more complex repairs involving module replacement or extensive wiring work.

10. Is it necessary to visit a dealership for repairs related to OBDII code U0155 in a Lexus?

- While a dealership may have specialized tools and expertise, independent repair shops and experienced mechanics can also diagnose and repair the U0155 code in a Lexus, potentially offering more cost-effective solutions.