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Engine-Codes – Generic – C1794

C1794 Code - Front Speed Sensor Right Circuit Malfunction

Quick Answer

The C1794 code indicates a Front Speed Sensor Right Circuit Malfunction. Common causes include Faulty front right speed sensor, Damaged wiring or connectors leading to the sensor, Corrosion or debris interfering with the sensor's operation. 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
C1794 indicates Front Speed Sensor Right Circuit Malfunction.
Common causes
Common causes include Faulty front right speed sensor, Damaged wiring or connectors leading to the sensor, Corrosion or debris interfering with the sensor's operation.
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 10, 2024
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Code C1794 Description

The C1794 code indicates a Front Speed Sensor Right Circuit Malfunction. This means that there is an issue with the front right speed sensor in the vehicle's anti-lock braking system (ABS). The speed sensor is responsible for monitoring the speed of the wheel and sending this information to the ABS control module. If the sensor detects any discrepancies in wheel speed, the ABS system will adjust the braking force to prevent wheel lock-up and skidding.

OBDII Code C1794 - Front Speed Sensor Right Circuit Malfunction
C1794 Code - Front Speed Sensor Right Circuit Malfunction

Common Causes of C1794

  1. Faulty front right speed sensor
  2. Damaged wiring or connectors leading to the sensor
  3. Corrosion or debris interfering with the sensor's operation
  4. ABS control module malfunction
  5. Issues with the wheel bearing or hub assembly affecting sensor operation

Symptoms of C1794

  1. ABS warning light illuminated on the dashboard
  2. Traction control system warning light activated
  3. Increased stopping distances
  4. Brakes locking up or skidding during sudden stops
  5. Decreased stability during braking

How to Fix C1794

  1. Begin by diagnosing the specific cause of the Front Speed Sensor Right Circuit Malfunction by using a diagnostic scanner to read the ABS system codes.
  2. Inspect the front right speed sensor for any visible damage, corrosion, or debris that may be affecting its operation. Clean the sensor and surrounding area if necessary.
  3. Check the wiring and connectors leading to the sensor for any signs of damage or loose connections. Repair or replace any damaged components.
  4. If the sensor itself is faulty, replace it with a new one compatible with the vehicle's make and model.
  5. Clear the ABS system codes with the diagnostic scanner and test drive the vehicle to ensure the issue has been resolved and the ABS system is functioning correctly.

Cost to Fix C1794

The typical repair costs for a Front Speed Sensor Right Circuit Malfunction can vary depending on the specific cause of the issue and the vehicle's make and model. In general, replacing a faulty speed sensor can cost between $100 and $300, including parts and labor. However, additional costs may apply if there are wiring or connector issues that need to be addressed. It's important to note that labor rates at auto repair shops can range from $80 to $150 per hour, so the total repair cost may vary based on the shop's rates and location.

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Code C1794 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 C1794 Code

1. What are the common symptoms of OBDII code C1794, Front Speed Sensor Right Circuit Malfunction?

- Common symptoms include ABS warning light illuminated on the dashboard, traction control issues, and potential loss of stability control.

2. What are the possible causes of OBDII code C1794?

- The code can be triggered by a faulty front right speed sensor, damaged wiring or connectors, or issues with the ABS control module.

3. How can I diagnose the Front Speed Sensor Right Circuit Malfunction?

- Diagnosis involves using an OBDII scanner to read the code, inspecting the front right speed sensor and its wiring for damage, and performing a continuity test.

4. Can I continue driving with OBDII code C1794 present?

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

5. How can I repair OBDII code C1794?

- Repair options include replacing the front right speed sensor, repairing damaged wiring or connectors, and resetting the fault code using an OBDII scanner.

6. Are there any DIY tips for fixing OBDII code C1794?

- DIY enthusiasts can attempt to visually inspect the sensor and wiring for damage, but professional diagnosis and repair are recommended for accurate resolution.

7. Can weather or road conditions trigger OBDII code C1794?

- Extreme weather conditions or driving on rough terrain can potentially lead to sensor damage, which may trigger the Front Speed Sensor Right Circuit Malfunction code.

8. How much does it typically cost to repair OBDII code C1794 at a mechanic or dealership?

- Repair costs can vary depending on the extent of the issue and labor rates, but expect to pay anywhere from $100 to $300 for parts and labor.

9. Will OBDII code C1794 cause a vehicle to fail a state inspection?

- Yes, in many states, a malfunctioning ABS system can cause a vehicle to fail inspection due to safety concerns related to braking and stability control.

10. How can I prevent OBDII code C1794 from recurring in the future?

- Regular maintenance, such as checking and cleaning sensors, inspecting wiring harnesses, and addressing any issues promptly, can help prevent the recurrence of this code.

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