AutoCodes – Generic – C1133

C1133 Code - Engine Signal 4

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: C1133 indicates Engine Signal 4.
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 21,182

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 C1133 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 C1133 - Engine Signal 4 - AutoCodes.com — C1133 Code - Engine Signal 4

What does this mean?

What are the Possible Causes of the DTC C1133?

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 C1133?

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

The code means that the Anti-Lock Brake System (ABS) control unit has detected that there is a problem with the Engine Control Module (ECM).

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1133 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 C1133 code?

Need more information on how to fix the C1133 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1133 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1133 Infiniti — Engine Signal 4
C1133 Nissan — Engine Signal 4

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 C1133 Code

1. What are the common symptoms of OBDII code C1133 (Engine Signal 4)?

- Common symptoms include an illuminated check engine light, reduced engine performance, and potential issues with the vehicle's braking system.

2. What are the possible causes of OBDII code C1133?

- Possible causes of code C1133 may include faulty wheel speed sensors, damaged wiring or connectors in the ABS system, or issues with the ABS control module.

3. How can I diagnose OBDII code C1133?

- Diagnosing code C1133 typically involves using a diagnostic scanner to retrieve the code, inspecting the ABS system components, checking wheel speed sensor readings, and testing the ABS module.

4. Can code C1133 be triggered by a loose wheel speed sensor?

- Yes, a loose or improperly installed wheel speed sensor can trigger code C1133 as it may disrupt the signal transmission to the ABS control module.

5. Is it safe to drive with OBDII code C1133 active?

- It is not recommended to drive with code C1133 active, as it may affect the vehicle's braking performance and overall safety. It is advisable to have the issue diagnosed and repaired promptly.

6. How do I repair OBDII code C1133?

- Repairing code C1133 may involve securing or replacing loose wheel speed sensors, repairing damaged wiring or connectors, and addressing any issues with the ABS control module as needed.

7. Can a DIY enthusiast fix OBDII code C1133 at home?

- While some aspects of diagnosing and repairing code C1133 can be done by DIY enthusiasts with the right tools and knowledge, it is recommended to consult a professional mechanic for accurate diagnosis and repair.

8. Will resetting the OBDII system clear code C1133?

- Resetting the OBDII system may temporarily clear code C1133, but if the underlying issue is not resolved, the code is likely to reappear once the problem is detected again.

9. How long does it typically take to repair OBDII code C1133?

- The repair time for code C1133 can vary depending on the exact cause of the issue, but it may take a few hours to a full day to diagnose and repair the problem effectively.

10. Can code C1133 affect the vehicle's emissions or fuel efficiency?

- While code C1133 is related to the ABS system rather than emissions or fuel efficiency directly, unresolved issues with the ABS system could potentially impact overall vehicle performance and safety.