AutoCodes – Generic – C0263

C0263 Code - CAN Signal Not Received From ECM

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Engine Control Module (ECM). Common causes include Faulty Engine Control Module (ECM), Engine Control Module (ECM) harness is open or shorted, Engine Control Module (ECM) 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: C0263 indicates CAN Signal Not Received From ECM.
Common causes: Common causes include Faulty Engine Control Module (ECM), Engine Control Module (ECM) harness is open or shorted, Engine Control Module (ECM) 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 3,990

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 Jun 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0263 Description

The Anti-Lock Brake System (ABS) Module monitors the Engine Control Module (ECM). The ABS Module sets the OBDII code when the Engine Control Module (ECM) is not to factory specifications.

OBDII Code C0263 - CAN Signal Not Received From ECM - AutoCodes.com — C0263 Code - CAN Signal Not Received From ECM

What does this mean?

What are the Possible Causes of the DTC C0263?

Faulty Engine Control Module (ECM)
Engine Control Module (ECM) harness is open or shorted
Engine Control Module (ECM) circuit poor electrical connection

How to Fix the DTC C0263?

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 C0263 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 C0263 code?

Need more information on how to fix the C0263 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0263 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C0263 Subaru — CAN Signal Not Received From ECM

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 C0263 Code

1. What are the common symptoms of OBDII code C0263 (CAN Signal Not Received From ECM)?

- Common symptoms include the check engine light illuminating, loss of communication with the engine control module (ECM), and potential drivability issues.

2. What are the possible causes of OBDII code C0263?

- The possible causes of this code include a faulty ECM, damaged wiring or connectors in the Controller Area Network (CAN) network, or a malfunctioning communication module.

3. How can I diagnose the cause of OBDII code C0263?

- Diagnosing this code typically involves using a scan tool to check for other trouble codes, testing the CAN network for continuity and shorts, inspecting the wiring and connectors for damage, and verifying the ECM's operation.

4. What are some repair tips for OBDII code C0263?

- Repair tips for this code may include repairing or replacing damaged wiring or connectors, reprogramming or replacing the ECM, and ensuring proper communication between all modules in the CAN network.

5. Can OBDII code C0263 cause other issues with the vehicle?

- Yes, if left unresolved, this code can lead to potential drivability issues, loss of critical communication between vehicle systems, and ultimately affect the overall performance of the vehicle.

6. Is it safe to continue driving with OBDII code C0263 present?

- It is not recommended to continue driving with this code present, as it can lead to further complications and potential safety hazards. It is best to address the issue promptly.

7. Can a DIY enthusiast fix OBDII code C0263 at home?

- Depending on the underlying cause, some DIY enthusiasts may be able to address this code at home by following proper diagnostic procedures and making necessary repairs to the CAN network or ECM.

8. How much does it typically cost to repair OBDII code C0263?

- The cost of repairing this code can vary depending on the specific cause, parts needed, and labor rates. It is advisable to consult a professional technician for an accurate estimate.

9. Will resetting the trouble codes make OBDII code C0263 disappear?

- Resetting the trouble codes may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear once the vehicle is driven and the system detects the problem again.

10. How can I prevent OBDII code C0263 from occurring in the future?

- To prevent this code from occurring in the future, it is essential to perform regular maintenance on the vehicle, address any communication issues promptly, and keep the CAN network components in good condition.