AutoCodes – Generic – C1134

C1134 Code - Engine Signal 5

Quick Answer

ABS Actuator and Electric Unit (Control Unit) and Engine Control Module (ECM) exchange the engine signal with Control Area Network (CAN) communication line. Common causes include Faulty Engine Control Module (ECM), Faulty ABS Actuator and Electric Unit (Control Unit), Control Area Network (CAN) communication line. 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: C1134 indicates Engine Signal 5.
Common causes: Common causes include Faulty Engine Control Module (ECM), Faulty ABS Actuator and Electric Unit (Control Unit), Control Area Network (CAN) communication line.
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 9,093

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 Aug 17, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code C1134 Description

ABS Actuator and Electric Unit (Control Unit) and Engine Control Module (ECM) exchange the engine signal with Control Area Network (CAN) communication line. Major engine components are malfunctioning.

OBDII Code C1134 - Engine Signal 5 - AutoCodes.com — C1134 Code - Engine Signal 5

What does this mean?

What are the Possible Causes of the DTC C1134?

Faulty Engine Control Module (ECM)
Faulty ABS Actuator and Electric Unit (Control Unit)
Control Area Network (CAN) communication line
Blown Engine Control Module (ECM) fuse

How to Fix the DTC C1134?

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

Control Area Network (CAN) Communication Line or Transmission Control Module (TCM). The code means that the ABS Control Module has lost or at some point lost communications with the TCM.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1134 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 C1134 code?

Need more information on how to fix the C1134 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1134 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1134 Infiniti — Engine Signal 5
C1134 Nissan — Engine Signal 5

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 C1134 Code

1. What does OBDII code C1134 mean?

C1134 indicates an issue with "Engine Signal 5," which typically relates to a communication or signal problem between the engine control module (ECM) and other systems, such as the ABS or traction control system.

2. What are the common symptoms of C1134?

Common symptoms include an illuminated ABS or traction control warning light, reduced vehicle stability performance, or inconsistent engine power delivery.

3. What causes the C1134 code to appear?

The code can be caused by faulty wiring or connectors, a malfunctioning sensor, issues with the engine control module (ECM), or a problem within the ABS or traction control system.

4. Can I drive with code C1134 active?

While the vehicle may still be drivable, it could experience reduced stability control or traction performance, which may pose safety risks in certain conditions.

5. How is the C1134 code diagnosed?

Diagnosis typically involves scanning the vehicle with an OBDII scanner, inspecting wiring and connectors for damage, and testing relevant sensors or modules for proper functionality.

6. What repairs can fix the C1134 code?

Repairs may include repairing or replacing damaged wiring or connectors, replacing a faulty sensor, or reprogramming or replacing the ECM if necessary.

7. Is C1134 specific to a particular vehicle make or model?

C1134 is a manufacturer-specific code, so its exact meaning and troubleshooting steps may vary depending on the vehicle's make and model.

8. How much does it cost to fix the C1134 code?

Repair costs depend on the root cause. Simple fixes like repairing wiring may cost under $100, while sensor or ECM replacements can range from $300 to $1,000 or more.

9. Can a low battery cause the C1134 code?

Yes, a weak or failing battery can cause communication issues between modules, potentially triggering the C1134 code.

10. How can I prevent the C1134 code from returning?

Regularly inspect and maintain your vehicleâ€™s electrical systems, ensure all connectors are secure, and address warning lights promptly to prevent recurring issues.