AutoCodes – Generic – U0259

U0259 Code - Lost Communication With Special Purpose Vehicle Control Module 'A'

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 Special Purpose Vehicle Control Module 'A', Special Purpose Vehicle Control Module 'A' harness is open or shorted, Special Purpose Vehicle Control Module 'A' 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: U0259 indicates Lost Communication With Special Purpose Vehicle Control Module 'A'.
Common causes: Common causes include Faulty Special Purpose Vehicle Control Module 'A', Special Purpose Vehicle Control Module 'A' harness is open or shorted, Special Purpose Vehicle Control Module 'A' 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 4,392

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 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0259 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 Special Purpose Vehicle Control Module 'A' has not been received.

OBDII Code U0259 - Lost Communication With Special Purpose Vehicle Control Module 'A' - AutoCodes.com — U0259 Code - Lost Communication With Special Purpose Vehicle Control Module 'A'

What does this mean?

What are the Possible Causes of the DTC U0259?

Faulty Special Purpose Vehicle Control Module 'A'
Special Purpose Vehicle Control Module 'A' harness is open or shorted
Special Purpose Vehicle Control Module 'A' circuit poor electrical connection

How to Fix the DTC U0259?

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 U0259 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 U0259 Code

1. What are the common symptoms of OBDII code U0259?

The common symptoms of U0259 include dashboard warning lights illuminating, issues with vehicle performance, and communication errors with the special purpose vehicle control module 'A'.

2. What are the possible causes of OBDII code U0259?

Possible causes of U0259 include damaged wiring or connectors, a faulty special purpose vehicle control module 'A', software issues, or a communication network malfunction.

3. How can I diagnose the reason behind OBDII code U0259?

Diagnosing U0259 involves conducting a thorough inspection of the wiring, connectors, and control module. Using a diagnostic scan tool to retrieve additional fault codes and checking for communication errors are also essential steps.

4. Can I still drive my vehicle with OBDII code U0259?

It is not recommended to drive your vehicle with U0259 present, as it can lead to further complications and potential safety hazards due to communication issues with the special purpose vehicle control module 'A'.

5. How can I repair OBDII code U0259?

Repairing U0259 involves addressing the root cause of the issue, which may include repairing or replacing damaged wiring, connectors, or the special purpose vehicle control module 'A'. Updating software or resetting the communication network may also be necessary.

6. Is it possible to reset OBDII code U0259 without professional help?

While you may be able to clear the code temporarily by disconnecting the battery, it is advisable to seek professional help to diagnose and repair the underlying issue causing U0259.

7. How much does it cost to fix OBDII code U0259?

The cost of fixing U0259 can vary depending on the specific cause of the issue, parts needed for repair, and labor costs. It is recommended to obtain quotes from automotive professionals for an accurate estimate.

8. Can a DIY enthusiast fix OBDII code U0259?

Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address simple causes of U0259, such as checking and repairing wiring connections. However, more complex issues may require professional assistance.

9. How long does it take to repair OBDII code U0259?

The repair time for U0259 can vary based on the diagnosis, availability of parts, and the complexity of the issue. Simple fixes may take a few hours, while more involved repairs could require more time.

10. Will OBDII code U0259 cause my vehicle to fail an emissions test?

U0259 may not directly cause your vehicle to fail an emissions test, but it indicates a malfunction that could impact emissions control systems. It is advisable to address the issue promptly to ensure your vehicle meets emission standards.