AutoCodes – Generic – U0015

U0015 Code - Medium Speed CAN Communication Bus (-) Open

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s), Check for more codes, Faulty Control Module. 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: U0015 indicates Medium Speed CAN Communication Bus (-) Open.
Common causes: Common causes include Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s), Check for more codes, Faulty Control Module.
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 6,144

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 29, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0015 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 supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U0015 - Medium Speed CAN Communication Bus (-) Open - AutoCodes.com — U0015 Code - Medium Speed CAN Communication Bus (-) Open

What does this mean?

What are the Possible Causes of the DTC U0015?

Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s)
Check for more codes
Faulty Control Module
Control Module harness is open or shorted
Control Module circuit poor electrical connection

How to Fix the DTC U0015?

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 U0015 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 U0015 code?

Need more information on how to fix the U0015 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0015 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 U0015 Code

1. What are common symptoms of OBDII code U0015 (Medium Speed CAN Communication Bus (-) Open)?

The common symptoms include the malfunction indicator light (MIL) illuminating, issues with the vehicle's communication systems, and potential difficulty diagnosing other related problems.

2. What are possible causes of OBDII code U0015?

Possible causes of U0015 can include damaged wiring or connectors in the medium speed CAN bus circuit, a faulty control module, a short circuit, or a loose connection.

3. How can I diagnose OBDII code U0015?

Diagnosing U0015 typically involves using a scan tool to retrieve the code, checking the integrity of the wiring and connectors in the medium speed CAN bus circuit, and testing the control modules for proper function.

4. Can OBDII code U0015 cause other issues with the vehicle?

Yes, U0015 can cause communication problems with other modules and systems in the vehicle, potentially leading to issues with data sharing and control functions.

5. What are some repair tips for fixing OBDII code U0015?

Repair tips for U0015 may include repairing or replacing damaged wiring, ensuring connectors are securely attached, checking for proper module operation, and clearing the trouble code after repairs are made.

6. Is it safe to continue driving with OBDII code U0015 present?

While the vehicle may still be operable with U0015 present, it is recommended to address the issue promptly to prevent potential communication failures and further damage to control modules.

7. How much does it typically cost to repair OBDII code U0015?

The cost of repairing U0015 can vary depending on the specific cause of the issue, but it may involve labor costs for diagnosis and repair, as well as potential expenses for replacement parts.

8. Can OBDII code U0015 be intermittent?

Yes, U0015 can sometimes be intermittent, meaning the issue may come and go, making it important to address the underlying cause to prevent future problems.

9. Are there any recalls related to OBDII code U0015?

Recalls related to U0015 can vary by vehicle make and model, so it's recommended to check with the manufacturer or a dealership to see if any recalls apply to your specific vehicle.

10. How can I prevent OBDII code U0015 from occurring in the future?

To help prevent U0015 from occurring in the future, regularly inspect and maintain the vehicle's wiring and connectors, address any communication issues promptly, and follow recommended maintenance schedules.