AutoCodes – Generic – U0158

U0158 Code - Lost Communication With Head Up Display Module

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Head Up Display Module, Head Up Display Module harness is open or shorted, Head Up Display Module circuit poor electrical connection. 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: U0158 indicates Lost Communication With Head Up Display Module.
Common causes: Common causes include Faulty Head Up Display Module, Head Up Display Module harness is open or shorted, Head Up Display Module circuit poor electrical connection.
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 4,570

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 Apr 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0158 Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in idle mode, both lines carry 2.5V. When data bits are being transmitted, the CAN high line goes to 3.75V, and the CAN low drops to 1.25V, thereby generating 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 Head Up Display Module has not been received.

OBDII Code U0158 - Lost Communication With Head Up Display Module - AutoCodes.com — U0158 Code - Lost Communication With Head Up Display Module

What does this mean?

What are the Possible Causes of the DTC U0158?

Faulty Head Up Display Module
Head Up Display Module harness is open or shorted
Head Up Display Module circuit poor electrical connection

How to Fix the DTC U0158?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0158 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.

Need more information about the U0158 code?

Need more information on how to fix the U0158 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0158 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U0158 Buick — Lost Communication With Head Up Display Module
U0158 Cadillac — Lost Communication With Head Up Display Module
U0158 Chevrolet — Lost Communication With Head Up Display Module
U0158 GMC — Lost Communication With Head Up Display Module

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 U0158 Code

What does the OBDII code U0158 mean?

Code U0158 indicates a loss of communication between the vehicle's main control system and the Head-Up Display (HUD) module.

What are the common symptoms of code U0158?

Symptoms may include the HUD not displaying any information, intermittent functionality, or warning lights on the dashboard.

What causes code U0158 to appear?

The code can be triggered by a faulty HUD module, damaged wiring or connectors, or issues with the CAN bus communication network.

Can a weak battery cause code U0158?

Yes, a weak or failing battery can lead to communication errors, including U0158, as insufficient power can disrupt system operations.

How can I diagnose the U0158 code?

Start by inspecting the HUD module, wiring, and connectors for damage or loose connections. Use a diagnostic scanner to check for additional communication-related codes.

Is the HUD module the only possible fault for U0158?

No, the issue could stem from wiring problems, connector corrosion, or a broader communication fault in the CAN bus network.

Can I reset the U0158 code without fixing the issue?

You can clear the code temporarily, but if the underlying issue isn’t resolved, the code will likely return.

How much does it cost to fix code U0158?

Repair costs vary based on the cause. Replacing a damaged HUD module can cost several hundred dollars, while fixing wiring or connectors may be less expensive.

Can I drive my car with code U0158?

Yes, the vehicle may still be drivable, but you’ll lose functionality from the HUD, and there could be underlying communication issues that need attention.

Should I take my car to a mechanic for U0158?

If you cannot identify or repair the issue yourself, it’s best to consult a qualified mechanic to ensure proper diagnosis and repair.