AutoCodes – Lexus – C1794 Lexus

C1794 Lexus 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 Lexus 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 2,852

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

What does this mean?

What are the Possible Causes of the DTC C1794 Lexus?

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 Lexus?

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 Lexus 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.

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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 C1794 Lexus Code

1. What are the common symptoms of OBDII code C1794 in a Lexus related to the Front Speed Sensor Right Circuit Malfunction?

- Common symptoms include ABS warning light illuminated on the dashboard, erratic speedometer readings, and potential loss of ABS functionality.

2. What are some possible causes of the C1794 code in a Lexus indicating a Front Speed Sensor Right Circuit Malfunction?

- Potential causes may include a faulty front right wheel speed sensor, damaged wiring or connectors in the sensor circuit, or issues with the ABS control module.

3. How can I diagnose the Front Speed Sensor Right Circuit Malfunction in my Lexus when the C1794 code is triggered?

- Diagnosing involves visually inspecting the sensor and its wiring for any visible damage, conducting resistance checks on the sensor, and using a scan tool to monitor sensor data.

4. Can I still drive my Lexus if the C1794 code is present due to a Front Speed Sensor Right Circuit Malfunction?

- It is generally safe to drive, but it is recommended to have the issue diagnosed and repaired promptly to ensure proper ABS function and vehicle safety.

5. Are there any DIY repair tips for resolving the Front Speed Sensor Right Circuit Malfunction in a Lexus with the C1794 code?

- DIY repair tips may include checking and cleaning sensor connectors, inspecting wiring for breaks or corrosion, and replacing the speed sensor if necessary.

6. How much does it typically cost to repair the Front Speed Sensor Right Circuit Malfunction in a Lexus triggering the C1794 code?

- Repair costs can vary depending on the exact cause of the issue, but they may range from $100 to $300 for parts and labor at a dealership or repair shop.

7. Is it possible for the C1794 code related to the Front Speed Sensor Right Circuit Malfunction to reoccur after repair?

- If the underlying issue is not fully resolved during the repair, there is a possibility that the code may reoccur. Proper diagnosis and thorough repair are essential to prevent this.

8. Can a Front Speed Sensor Right Circuit Malfunction in a Lexus triggering the C1794 code affect other vehicle systems?

- Yes, a malfunctioning front speed sensor can impact the overall ABS system, potentially affecting stability control and traction control functions as well.

9. How long does it typically take to repair the Front Speed Sensor Right Circuit Malfunction causing the C1794 code in a Lexus?

- The repair duration can vary based on the complexity of the issue and availability of parts, but it may take anywhere from 1 to 3 hours to complete the repair.

10. Should I reset the OBDII code C1794 in my Lexus after repairing the Front Speed Sensor Right Circuit Malfunction?

- It is recommended to clear the code using an OBDII scanner after repairing the issue to reset the ABS system and ensure that the warning light does not reappear.