AutoCodes – Toyota – C1794 Toyota

C1794 Toyota Code - Front Speed Sensor Right Circuit Malfunction

Quick Answer

This circuit receives the speed detected by the speed sensor from the Skid Control ECU. Common causes include Faulty Front Speed Sensor Right, Front Speed Sensor Right harness is open or shorted, Front Speed Sensor Right circuit poor electrical connection. 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 Toyota indicates Front Speed Sensor Right Circuit Malfunction.
Common causes: Common causes include Faulty Front Speed Sensor Right, Front Speed Sensor Right harness is open or shorted, Front Speed Sensor Right circuit poor electrical connection.
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 2,365

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 Nov 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1794 Toyota Description

This circuit receives the speed detected by the speed sensor from the Skid Control ECU. The Skid Control ECU monitors the Front Speed Sensor Right. The Skid Control ECU sets the OBDII code when the Front Speed Sensor Right is not to factory specifications.

OBDII Code C1794 Toyota - Front Speed Sensor Right Circuit Malfunction - AutoCodes.com — C1794 Toyota Code - Front Speed Sensor Right Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC C1794 Toyota?

Faulty Front Speed Sensor Right
Front Speed Sensor Right harness is open or shorted
Front Speed Sensor Right circuit poor electrical connection
Faulty Skid Control ECU

How to Fix the DTC C1794 Toyota?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1794 Toyota 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 C1794 Toyota code?

Need more information on how to fix the C1794 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1794 Toyota code diagnosed by a professional: Find a repair shop in your area

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 Toyota Code

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

The common symptoms include ABS warning light illuminated on the dashboard, potential loss of ABS functionality, and traction control system malfunctions.

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

Possible causes include a faulty front speed sensor on the right side, damaged wiring or connectors in the speed sensor circuit, or issues with the ABS control module.

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

Diagnosis typically involves using a diagnostic scanner to read the OBDII code, inspecting the right front speed sensor for damage, checking the wiring and connectors for any issues, and testing the ABS control module.

4. Can I still drive my Toyota with the C1794 code present?

It is not recommended to drive the vehicle with the C1794 code present, as it may affect the ABS system's functionality, potentially compromising safety on the road.

5. How can I repair OBDII code C1794 Toyota?

Repair options may include replacing the front speed sensor on the right side, repairing or replacing damaged wiring or connectors, or addressing any issues with the ABS control module as needed.

6. Are there any DIY tips for troubleshooting the Front Speed Sensor Right Circuit Malfunction?

While basic inspections like checking for loose or damaged wiring can be done by DIY enthusiasts, diagnosing and repairing the specific cause of the code may require professional help due to the complexity of ABS systems.

7. Is the Front Speed Sensor Right Circuit Malfunction a serious issue?

Yes, this code should be addressed promptly as it can affect the proper operation of the ABS system, impacting the vehicle's ability to brake safely, especially in emergency situations.

8. Can extreme weather conditions cause the C1794 code to trigger?

Extreme weather conditions, such as heavy rain or snow, can potentially contribute to the malfunction of the front speed sensor or its circuit, triggering the C1794 code.

9. How much does it typically cost to repair OBDII code C1794 Toyota?

The cost of repair can vary depending on the specific cause of the issue, but it may involve parts and labor costs ranging from $100 to $500 or more, depending on the extent of the repairs needed.

10. Will resetting the OBDII code clear the issue?

Resetting the code may temporarily clear the warning light, but if the underlying issue causing the C1794 code is not addressed, the problem will likely reoccur. It is essential to diagnose and repair the root cause of the code for a lasting solution.