AutoCodes – Generic – U0208

U0208 Code - Lost Communication with Seat Control Module 'A'

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 Seat Control Module 'A', Seat Control Module 'A' 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: U0208 indicates Lost Communication with Seat Control Module 'A'.
Common causes: Common causes include Faulty Controller Area Network (CAN) Communication System, Faulty Seat Control Module 'A', Seat Control Module 'A' 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 17,529

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 28, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code U0208 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 Seat Control Module 'A' has not been received.

OBDII Code U0208 - Lost Communication with Seat Control Module 'A' - AutoCodes.com — U0208 Code - Lost Communication with Seat Control Module 'A'

What does this mean?

What are the Possible Causes of the DTC U0208?

Faulty Controller Area Network (CAN) Communication System
Faulty Seat Control Module 'A'
Seat Control Module 'A' harness is open or shorted
Seat Control Module 'A' circuit poor electrical connection

How to Fix the DTC U0208?

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 U0208 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 U0208 code?

Need more information on how to fix the U0208 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0208 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U0208 Buick — Lost Communication With Seat Memory Control Module
U0208 Cadillac — Lost Communication With Seat Memory Control Module
U0208 Chevrolet — Lost Communication With Seat Memory Control Module
U0208 Chrysler — Lost Communication With Heated Seat Control Module
U0208 Dodge — Lost Communication With Heated Seat Control Module
U0208 GMC — Lost Communication With Seat Memory Control Module
U0208 Jeep — Lost Communication With Heated Seat Control Module
U0208 Lexus — Lost Communication with Seat Control Module 'A'
U0208 RAM — Lost Communication With Heated Seat Control Module
U0208 Toyota — Lost Communication with Seat Control Module 'A'

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 U0208 Code

1. What are the common symptoms of OBDII code U0208?

The common symptoms of U0208 include non-functioning power seats, inability to adjust seat positions, and warning lights on the dashboard.

2. What can cause the OBDII code U0208 to trigger?

The code U0208 is triggered when there is a communication failure between the vehicle's electronic control module and the seat control module 'A'.

3. How can I diagnose the OBDII code U0208?

Diagnosing U0208 involves using a diagnostic scanner to retrieve the fault codes, checking the wiring and connections to the seat control module, and testing the module itself for malfunctions.

4. What are some possible repair tips for resolving the OBDII code U0208?

Repair tips for U0208 may include checking and repairing any damaged wiring or connections, ensuring proper power supply to the seat control module, and replacing the faulty module if necessary.

5. Can a DIY enthusiast fix the OBDII code U0208 at home?

While some basic troubleshooting steps can be performed by a DIY enthusiast, resolving U0208 may require advanced diagnostic tools and expertise, so it is recommended to seek professional help for accurate diagnosis and repair.

6. How important is it to address the OBDII code U0208 promptly?

It is important to address U0208 promptly as communication failures between control modules can lead to other malfunctions in the vehicle's electrical system, affecting overall performance and safety.

7. Is it safe to drive with the OBDII code U0208 active?

It is generally safe to drive with the U0208 code present, but it is recommended to address the issue promptly to avoid potential complications and ensure the proper functioning of the seat control module.

8. Can a low battery voltage trigger the OBDII code U0208?

Yes, low battery voltage or electrical issues can sometimes cause communication failures between modules, leading to the triggering of code U0208.

9. How can I prevent the OBDII code U0208 from reoccurring in the future?

To prevent U0208 from reoccurring, regular maintenance checks, ensuring proper wiring connections, and addressing any electrical issues promptly can help maintain the communication integrity between control modules.

10. Is resetting the fault codes enough to fix the OBDII code U0208?

Resetting the fault codes may temporarily clear the U0208 code, but it will likely reappear if the underlying communication issue between the control modules is not resolved.