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C1133 Infiniti Code - Engine Signal 4

Quick Answer

The C1133 code in an Infiniti vehicle refers to an issue with Engine Signal 4. Common causes include Faulty ECM: A malfunctioning engine control module (ECM) can trigger the C1133 code and cause issues with engine signal monitoring, Wiring Issues: Damaged or corroded wiring connections related to Engine Signal 4 can disrupt communication within the engine system, Sensor Malfunction: A faulty sensor responsible for monitoring engine signals can lead to the C1133 code being triggered. 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 Infiniti indicates Engine Signal 4.
Common causes
Common causes include Faulty ECM: A malfunctioning engine control module (ECM) can trigger the C1133 code and cause issues with engine signal monitoring, Wiring Issues: Damaged or corroded wiring connections related to Engine Signal 4 can disrupt communication within the engine system, Sensor Malfunction: A faulty sensor responsible for monitoring engine signals can lead to the C1133 code being triggered.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code C1133 Infiniti Description

The C1133 code in an Infiniti vehicle refers to an issue with Engine Signal 4. This code typically indicates a problem with the engine control module (ECM) or a related component that is responsible for monitoring and regulating signals within the engine system. When this code is triggered, it can affect the vehicle's performance by causing issues such as poor acceleration, rough idling, reduced fuel efficiency, and potential stalling.

OBDII Code C1133 Infiniti - Engine Signal 4
C1133 Infiniti Code - Engine Signal 4

Common Causes of C1133 Infiniti

  1. Faulty ECM: A malfunctioning engine control module (ECM) can trigger the C1133 code and cause issues with engine signal monitoring.
  2. Wiring Issues: Damaged or corroded wiring connections related to Engine Signal 4 can disrupt communication within the engine system.
  3. Sensor Malfunction: A faulty sensor responsible for monitoring engine signals can lead to the C1133 code being triggered.
  4. Communication Network Problems: Issues with the engine's communication network, such as CAN bus errors, can cause disruptions in signal transmission.

Symptoms of C1133 Infiniti

  1. Check Engine Light: The most common symptom associated with the C1133 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Reduced Engine Performance: The vehicle may experience a decrease in engine performance, leading to issues such as poor acceleration and sluggish response.
  3. Rough Idling: The engine may idle roughly or inconsistently, causing vibrations or shaking while the vehicle is stationary.
  4. Stalling: In severe cases, the engine may stall unexpectedly, especially when coming to a stop or during acceleration.
  5. Reduced Fuel Efficiency: The vehicle may exhibit decreased fuel efficiency due to the engine not operating optimally.

How to Fix C1133 Infiniti

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the specific trouble codes, including C1133, and perform a thorough inspection of the engine system to identify the root cause.
  2. Check Wiring Connections: Inspect all wiring connections related to Engine Signal 4 for any damage, corrosion, or loose connections, and repair or replace as needed.
  3. Test Sensors: Check the operation of sensors involved in monitoring engine signals, such as the crankshaft position sensor, camshaft position sensor, and throttle position sensor, and replace any faulty sensors.
  4. ECM Replacement: If the engine control module is found to be faulty, it may need to be replaced with a new unit and programmed to the vehicle's specifications.
  5. Clear Codes and Test Drive: After completing the repairs, clear the trouble codes from the ECM, perform a test drive to ensure the issue is resolved, and verify that the check engine light does not reappear.

Cost to Fix C1133 Infiniti

The typical repair costs for addressing the C1133 code in an Infiniti vehicle can vary depending on the specific cause of the issue and the required repairs. On average, the cost of diagnosing and repairing this issue may range from $200 to $800, including parts and labor. However, it's essential to note that the actual cost can fluctuate based on factors such as the location of the repair shop, the vehicle's make and model, and the type of engine involved. Diagnostic time and labor rates at auto repair shops typically range from $80 to $150 per hour, with rates potentially higher at dealerships or in metropolitan areas and lower at independent shops. For a more accurate estimate, it's advisable to consult with a local auto repair shop.

What does this mean?

Tech Notes for C1133 Infiniti

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).

When is the Code Detected?

Based on the signal from Engine Control Module (ECM), the Control Area Network (CAN)-Local Area Network (LAN) converter (CLC) judges that the engine control system is malfunctioning.

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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 C1133 Infiniti Code

1. What does OBDII code C1133 for Infiniti indicate?

The OBDII code C1133 for Infiniti, also known as Engine Signal 4, typically points to an issue with the ABS pressure sensor circuit.

2. What are the common symptoms of OBDII code C1133 in an Infiniti vehicle?

Common symptoms of OBDII code C1133 in an Infiniti may include the ABS warning light illuminating on the dashboard, possible loss of ABS functionality, and irregular braking performance.

3. What are the potential causes of OBDII code C1133 in an Infiniti?

Potential causes of OBDII code C1133 in an Infiniti include a faulty ABS pressure sensor, damaged wiring or connectors in the ABS system, or issues with the ABS control module.

4. How can I diagnose OBDII code C1133 in my Infiniti?

Diagnosing OBDII code C1133 in your Infiniti typically involves using a diagnostic scan tool to retrieve the trouble codes, inspecting the ABS pressure sensor and related components, and testing the wiring and connectors for any faults.

5. Can I continue driving my Infiniti with OBDII code C1133 present?

It is not recommended to continue driving your Infiniti with OBDII code C1133 present, as it may compromise the functionality of the ABS system and affect braking performance.

6. How can I repair OBDII code C1133 in my Infiniti?

Repairing OBDII code C1133 in your Infiniti may involve replacing the faulty ABS pressure sensor, repairing or replacing damaged wiring or connectors, or addressing any issues with the ABS control module.

7. Are there any DIY tips for troubleshooting OBDII code C1133 in an Infiniti?

DIY tips for troubleshooting OBDII code C1133 in an Infiniti include checking the ABS fuse, inspecting the ABS sensors for debris or damage, and ensuring all connectors in the ABS system are securely connected.

8. Will resetting the OBDII code C1133 in my Infiniti make the issue go away?

Resetting the OBDII code C1133 in your Infiniti may temporarily clear the code, but it will not fix the underlying issue causing the code to appear. It is crucial to diagnose and repair the root cause of the problem.

9. How much does it cost to fix OBDII code C1133 in an Infiniti?

The cost to fix OBDII code C1133 in an Infiniti can vary depending on the specific cause of the issue, the parts needed for repair, and whether you choose to do the repair yourself or take it to a professional mechanic.

10. Can OBDII code C1133 in an Infiniti cause any other problems if left untreated?

If left untreated, OBDII code C1133 in an Infiniti can potentially lead to further damage to the ABS system, compromised braking performance, and safety concerns while driving. It is essential to address the issue promptly.

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