AutoCodes – Generic – U0261

U0261 Code - Lost Communication With Seat Control Switch Module 'B'

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 Seat Control Switch Module 'B', Seat Control Switch Module 'B' harness is open or shorted, Seat Control Switch Module 'B' 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: U0261 indicates Lost Communication With Seat Control Switch Module 'B'.
Common causes: Common causes include Faulty Seat Control Switch Module 'B', Seat Control Switch Module 'B' harness is open or shorted, Seat Control Switch Module 'B' 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 1,624

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 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0261 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 Seat Control Switch Module 'B' has not been received.

OBDII Code U0261 - Lost Communication With Seat Control Switch Module 'B' - AutoCodes.com — U0261 Code - Lost Communication With Seat Control Switch Module 'B'

What does this mean?

What are the Possible Causes of the DTC U0261?

Faulty Seat Control Switch Module 'B'
Seat Control Switch Module 'B' harness is open or shorted
Seat Control Switch Module 'B' circuit poor electrical connection

How to Fix the DTC U0261?

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 U0261 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 U0261 code?

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Need Help with the Code?

Get the U0261 code diagnosed by a professional: Find a repair shop in your area

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 U0261 Code

1. What does the OBDII code U0261 mean?

U0261 indicates that the vehicle's communication system has lost contact with the Seat Control Switch Module 'B'.

2. What are the common symptoms of the U0261 code?

Symptoms may include unresponsive seat adjustment controls, loss of memory seat settings, and possible warning lights on the dashboard.

3. What causes the U0261 code to appear?

Common causes include a faulty Seat Control Switch Module 'B', damaged wiring or connectors, issues with the CAN bus network, or a blown fuse.

4. How can I diagnose the U0261 code?

To diagnose, check the wiring and connectors to the Seat Control Switch Module 'B', inspect the CAN bus network for faults, and test the module for proper operation.

5. Can I still drive with the U0261 code active?

Yes, you can drive the vehicle, but seat adjustment functionality may be limited or unavailable, which could affect comfort and safety.

6. How do I fix the U0261 code?

Repair steps may include reconnecting loose or damaged wiring, replacing the Seat Control Switch Module 'B', or repairing faults in the CAN bus network.

7. Is the U0261 code specific to certain manufacturers?

No, U0261 is a generic communication code and may appear on various makes and models, but the exact seat module design may vary.

8. How much does it cost to repair the U0261 code?

Repair costs vary depending on the issue but can range from $50 for simple wiring repairs to $500+ if the module needs replacement.

9. Can a dead battery trigger the U0261 code?

Yes, a dead or weak battery can disrupt communication between modules and potentially trigger the U0261 code.

10. Do I need special tools to repair the U0261 code?

A diagnostic scan tool capable of reading CAN bus communication and a multimeter for testing wiring are often required to diagnose and repair this code.