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Engine-Codes – Generic – C1156

C1156 Code - Speed Wheel Sensor Communication Circuit

Quick Answer

The C1156 diagnostic trouble code (DTC) refers to a communication circuit issue with the speed wheel sensor in a vehicle. Common causes include Faulty speed wheel sensor, Damaged or corroded wiring harness connecting the sensor to the ECM, Loose or poor electrical connections. 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
C1156 indicates Speed Wheel Sensor Communication Circuit.
Common causes
Common causes include Faulty speed wheel sensor, Damaged or corroded wiring harness connecting the sensor to the ECM, Loose or poor electrical connections.
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 C1156 Description

The C1156 diagnostic trouble code (DTC) refers to a communication circuit issue with the speed wheel sensor in a vehicle. The speed wheel sensor is a crucial component of the anti-lock braking system (ABS) and traction control system. The sensor is responsible for monitoring the speed of each wheel and transmitting this data to the vehicle's electronic control module (ECM) for proper functioning of the ABS and traction control systems.

OBDII Code C1156 - Speed Wheel Sensor Communication Circuit
C1156 Code - Speed Wheel Sensor Communication Circuit

Common Causes of C1156

  1. Faulty speed wheel sensor
  2. Damaged or corroded wiring harness connecting the sensor to the ECM
  3. Loose or poor electrical connections
  4. ECM software malfunction
  5. Physical damage to the sensor due to road debris or wear and tear

Symptoms of C1156

  1. ABS warning light or traction control light illuminated on the dashboard
  2. Erratic or pulsating brake pedal during braking
  3. Loss of traction control or stability control functionality
  4. ABS system engaging unexpectedly or failing to engage when needed
  5. Uneven braking or pulling to one side during braking

How to Fix C1156

  1. Perform a visual inspection of the speed wheel sensor and wiring harness for any visible damage or corrosion.
  2. Test the sensor using a multimeter to check for proper resistance and continuity.
  3. Clean the sensor and connectors to ensure a secure electrical connection.
  4. If the sensor is faulty, replace it with a new one following the manufacturer's guidelines.
  5. Clear the DTC from the ECM memory using a diagnostic scan tool and conduct a road test to verify proper operation of the ABS and traction control systems.

Cost to Fix C1156

The cost of repairing a speed wheel sensor communication circuit issue can vary depending on the make and model of the vehicle, the location of the repair shop, and the extent of the damage. On average, the repair cost can range from $150 to $400, including parts and labor. It's recommended to consult a professional mechanic for a more accurate estimate based on your specific vehicle and circumstances.

When is the Code Detected?

When steering angle sensor is not transmitting Control Area Network (CAN) communication signal to the ABS Actuator and Electric Unit (Control Unit).

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Code C1156 Information for Specific Makes

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 C1156 Code

1. What are the common symptoms of OBDII code C1156 (Speed Wheel Sensor Communication Circuit)?

- Common symptoms include ABS warning light illuminated on the dashboard, traction control issues, and erratic speedometer readings.

2. What can cause the OBDII code C1156 to trigger?

- The code C1156 can be triggered by damaged or loose wiring, faulty speed wheel sensors, or issues with the ABS module.

3. How can I diagnose the Speed Wheel Sensor Communication Circuit issue related to code C1156?

- Diagnose by visually inspecting the wiring, checking the speed wheel sensors for damage, and using a scan tool to retrieve live data from the ABS module.

4. Is it safe to continue driving with OBDII code C1156 present?

- It is not recommended to drive with the code C1156 active, as it can affect the vehicle's ABS and traction control systems, compromising safety.

5. How can I repair OBDII code C1156 (Speed Wheel Sensor Communication Circuit)?

- Repair options include repairing or replacing damaged wiring, replacing faulty speed wheel sensors, and addressing any issues with the ABS module.

6. Can bad weather conditions trigger OBDII code C1156?

- Yes, extreme weather conditions like heavy rain or snow can cause water damage to the speed wheel sensors or their wiring, triggering the code C1156.

7. Will resetting the OBDII code C1156 clear the issue permanently?

- Resetting the code may temporarily clear the warning light, but it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

8. Can a DIY enthusiast fix OBDII code C1156 at home?

- Depending on the root cause, DIY enthusiasts with the necessary tools and knowledge about automotive electrical systems may be able to address the issue at home.

9. How much does it typically cost to repair OBDII code C1156 at a mechanic or dealership?

- The cost of repairing OBDII code C1156 can vary widely depending on the specific issue, but it may range from around $100 to $500 or more at a mechanic or dealership.

10. Are there any preventative maintenance tips to avoid triggering OBDII code C1156?

- Regularly inspecting the speed wheel sensors and their wiring for damage, and ensuring they are securely mounted can help prevent issues leading to code C1156.

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