C1104 DTC Code


In the world of automotive diagnostics, the C1104 Diagnostic Trouble Code (DTC) stands out as a crucial piece of information for both mechanics and car owners. This code is associated with specific error conditions that affect the Anti-Lock Braking System (ABS) of a vehicle. In this comprehensive guide, we will explore the C1104 DTC code, its possible causes, diagnostic procedures, and potential solutions. So, fasten your seatbelts and let’s dive deep into the world of C1104!

Understanding the C1104 DTC Code

  1. What does the C1104 DTC code indicate? The C1104 code is generated when a fault is detected in the ABS steering angle sensor circuit. The ABS control module continuously monitors the sensor to ensure accurate steering angle information. If any anomalies are found, the C1104 DTC code is triggered, indicating a problem in the steering angle sensor circuit.

  2. What are the possible causes of the C1104 DTC code? The C1104 code can be caused by various factors, including:

    • Damaged or faulty steering angle sensor: Physical damage or internal malfunctions in the sensor can trigger the code.
    • Wiring issues: Loose connections, short circuits, or damaged wiring in the steering angle sensor circuit can lead to the C1104 code.
    • Faulty ABS control module: A malfunctioning ABS control module may falsely interpret the signals from the steering angle sensor, triggering the code.
  3. How is the C1104 DTC code diagnosed? To diagnose and troubleshoot the C1104 code, the following steps are typically undertaken:

    • First, the mechanic will use an OBD-II scanner to retrieve the trouble codes stored in the vehicle’s ABS control module.
    • Once the C1104 code is confirmed, a visual inspection of the steering angle sensor and its wiring will be conducted to identify any obvious signs of damage.
    • The technician may then perform functional tests, such as checking for proper steering angle sensor operation during various driving maneuvers.
    • If necessary, the steering angle sensor’s resistance and voltage values may be measured using specialized diagnostic tools to ensure they fall within the manufacturer’s specifications.

Potential Solutions for the C1104 DTC Code

Once the C1104 code is diagnosed, several potential solutions can be explored to rectify the issue:

  • Repair or replace the steering angle sensor: If the sensor is found to be damaged or faulty, it may need to be repaired or replaced with a new one. This process typically involves removing the old sensor and installing a new one in its place.
  • Repair or replace damaged wiring: In cases where the issue lies in the wiring or connections, the damaged components can be repaired or replaced.
  • Repair or replace the ABS control module: If the ABS control module is determined to be the root cause, it can be repaired or replaced as necessary. However, this option should only be pursued if other potential causes have been ruled out.


Dealing with the C1104 DTC code requires a thorough understanding of the ABS steering angle sensor circuit and its associated components. By following the appropriate diagnostic procedures and considering the possible causes, you can effectively identify and address the underlying issue. Remember, if you’re not confident in your automotive knowledge or diagnostic skills, it’s always recommended to consult a professional mechanic to ensure accurate diagnosis and repair.

Frequently Asked Questions

  1. Can I drive my vehicle with the C1104 DTC code? Driving a vehicle with the C1104 code is not recommended. The ABS system plays a crucial role in the vehicle’s overall safety by preventing wheel lock-up during braking. With the C1104 code present, the ABS system may not function properly, compromising your ability to maintain control during sudden stops or slippery road conditions. It’s advisable to have the issue addressed promptly to ensure optimal safety.

  2. Can a simple reset fix the C1104 DTC code? In some cases, resetting the ABS system by disconnecting the battery for a few minutes may temporarily clear the C1104 code. However, if the underlying issue that triggered the code remains unresolved, it is likely to reappear. Therefore, it is crucial to diagnose and fix the root cause of the code for a permanent solution.

  3. Is the C1104 DTC code specific to a particular make or model? While the C1104 code generally refers to a fault in the ABS steering angle sensor circuit, the specific interpretations and solutions may vary depending on the vehicle’s make and model. It is always recommended to consult the vehicle’s service manual or a trusted automotive professional for accurate and model-specific information.

About author


Meet Sam Mitchell, your experienced and reliable guide in the complex world of car fault codes. With a robust career spanning over 15 years as a professional car mechanic, John has the skills, knowledge, and practical experience to help you navigate car fault issues with confidence.


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