AutoCodes – Chevrolet – U18BB Chevrolet

U18BB Chevrolet Code - Lost Communication With Power Steering Control Module On Chassis Expansion CAN Bus

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Power Steering Control Module, Power Steering Control Module harness is open or shorted, Power Steering Control 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: U18BB Chevrolet indicates Lost Communication With Power Steering Control Module On Chassis Expansion CAN Bus.
Common causes: Common causes include Faulty Power Steering Control Module, Power Steering Control Module harness is open or shorted, Power Steering Control 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 517

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U18BB Chevrolet Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. The Diagnostic Trouble Code (DTC) will set a supervised periodic message that includes the transmitter device availability that has not been received.

OBDII Code U18BB Chevrolet - Lost Communication With Power Steering Control Module On Chassis Expansion CAN Bus - AutoCodes.com — U18BB Chevrolet Code - Lost Communication With Power Steering Control Module On Chassis Expansion CAN Bus

What does this mean?

What are the Possible Causes of the DTC U18BB Chevrolet?

Faulty Power Steering Control Module
Power Steering Control Module harness is open or shorted
Power Steering Control Module circuit poor electrical connection

How to Fix the DTC U18BB Chevrolet?

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 U18BB Chevrolet 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 U18BB Chevrolet Code

1. What are common symptoms of OBDII code U18BB on a Chevrolet related to lost communication with the power steering control module?

The common symptoms include loss of power steering functionality, illuminated power steering warning light on the dashboard, and potential difficulty steering the vehicle.

2. What are some possible causes of OBDII code U18BB on a Chevrolet indicating lost communication with the power steering control module?

Potential causes include faulty wiring or connectors in the CAN bus system, a malfunctioning power steering control module, issues with the vehicle's electronic control unit (ECU), or a software glitch.

3. How can I diagnose the OBDII code U18BB on my Chevrolet that points to a lost communication issue with the power steering control module?

Diagnosis typically involves using a diagnostic scanner to retrieve the specific trouble code, checking the power steering control module for proper functioning, inspecting the wiring and connectors for any damage, and verifying communication signals within the CAN bus system.

4. Is it safe to drive my Chevrolet with the OBDII code U18BB related to lost communication with the power steering control module?

It is not recommended to drive the vehicle with this code present, as it may lead to a loss of power steering assistance and potentially compromise the safety of driving.

5. How can I repair OBDII code U18BB on my Chevrolet due to lost communication with the power steering control module?

Repair options may include fixing any wiring or connector issues, replacing the power steering control module if faulty, reprogramming the ECU, or seeking professional assistance for further diagnosis and repair.

6. Can a DIY enthusiast fix the OBDII code U18BB related to lost communication with the power steering control module on a Chevrolet?

While some basic troubleshooting and repairs can be done by experienced DIY enthusiasts, it is advisable to consult a professional mechanic or authorized service center for accurate diagnosis and repair of complex electronic issues.

7. Are there any recalls or service bulletins related to OBDII code U18BB on Chevrolet vehicles for lost communication with the power steering control module?

It is recommended to check with Chevrolet's official website or contact a local dealership to inquire about any recalls or service bulletins specifically addressing this OBDII code and related issues.

8. How can I prevent OBDII code U18BB from occurring again on my Chevrolet after repairing the communication issue with the power steering control module?

Regular vehicle maintenance, checking for loose connections, keeping the electrical system in good condition, and following manufacturer-recommended service schedules can help prevent such communication errors from reoccurring.