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C1401 Lexus Code - Front Speed Sensor Right Malfunction

Quick Answer

The C1401 code for Lexus indicates a malfunction in the front speed sensor on the right side of the vehicle. Common causes include Damaged or worn front speed sensor, Loose or corroded electrical connections to the sensor, Faulty ABS module. 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
C1401 Lexus indicates Front Speed Sensor Right Malfunction.
Common causes
Common causes include Damaged or worn front speed sensor, Loose or corroded electrical connections to the sensor, Faulty ABS module.
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 Aug 19, 2024
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Code C1401 Lexus Description

The C1401 code for Lexus indicates a malfunction in the front speed sensor on the right side of the vehicle. The speed sensor is responsible for detecting the rotational speed of the wheel, which is crucial for the proper functioning of the vehicle's anti-lock braking system (ABS) and traction control system. When this sensor malfunctions, it can lead to inaccurate speed readings, which can affect the vehicle's braking performance and stability control.

OBDII Code C1401 Lexus - Front Speed Sensor Right Malfunction
C1401 Lexus Code - Front Speed Sensor Right Malfunction

Common Causes of C1401 Lexus

  1. Damaged or worn front speed sensor.
  2. Loose or corroded electrical connections to the sensor.
  3. Faulty ABS module.
  4. Wheel bearing issues affecting sensor alignment.
  5. Wiring harness damage or short circuit.

Symptoms of C1401 Lexus

  1. ABS light illuminated on the dashboard.
  2. Traction control system warning light activated.
  3. Inaccurate speedometer readings.
  4. ABS system may engage unexpectedly.
  5. Increased stopping distance during braking.

How to Fix C1401 Lexus

  1. Begin by diagnosing the specific cause of the malfunction using a diagnostic scanner.
  2. Inspect the front speed sensor and its wiring for any visible damage or corrosion.
  3. Replace the front speed sensor if it is found to be faulty.
  4. Check and secure all electrical connections to ensure a proper connection.
  5. Test drive the vehicle to confirm that the issue has been resolved and clear the diagnostic trouble codes.

Cost to Fix C1401 Lexus

The cost of repairing a front speed sensor malfunction on a Lexus can vary depending on the specific cause of the issue and the labor rates in your area. On average, the cost of replacing a front speed sensor can range from $150 to $300, including parts and labor. Additional costs may apply if there are other underlying issues that need to be addressed. It's recommended to consult with a trusted mechanic or dealership for a more accurate estimate based on your vehicle's make and model.

What does this mean?

Tech Notes for C1401 Lexus

If no damage to the speed sensor tip is found during this inspection, do not replace the speed sensor.
If there is iron powder sticking to the rotor, this will result in a malfunction, so confirm that the rotor is not contaminated with foreign material before replacing the sensor.
Check the speed sensor signal after cleaning or replacement.
On most vehicles, the Front Speed Sensor Rotor is incorporated into the Front Axle Hub Sub-Assembly. If the Speed Sensor Rotor needs to be replaced, replace it together with the Front Axle Hub Sub-Assembly.

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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 C1401 Lexus Code

1. What are the common symptoms of OBDII code C1401 in a Lexus related to the Front Speed Sensor Right Malfunction?

The common symptoms of this code may include the ABS warning light turning on, traction control system malfunction, and potential loss of stability control.

2. What are the possible causes of the Front Speed Sensor Right Malfunction in a Lexus triggering the C1401 code?

Potential causes of this issue may include a faulty front speed sensor, damaged wiring or connectors, sensor alignment issues, or sensor contamination.

3. How can I diagnose the Front Speed Sensor Right Malfunction in my Lexus when experiencing the C1401 code?

You can diagnose this issue by inspecting the front speed sensor and its wiring for any visible damage, testing the sensor with a multimeter, and checking for proper sensor alignment.

4. Can I continue driving my Lexus with the C1401 code related to the Front Speed Sensor Right Malfunction?

It is not recommended to continue driving your vehicle with this code present, as it can affect the operation of important safety systems like ABS and traction control.

5. How can I repair the Front Speed Sensor Right Malfunction in my Lexus causing the C1401 code?

Repairing this issue typically involves replacing the front speed sensor, repairing any damaged wiring or connectors, ensuring proper sensor alignment, and clearing the error code.

6. Are there any DIY tips for fixing the Front Speed Sensor Right Malfunction in a Lexus with the C1401 code?

While some basic inspections and sensor cleaning can be done by DIY enthusiasts, it is recommended to have a professional technician diagnose and repair this issue to ensure proper functioning of safety systems.

7. Can weather conditions affect the Front Speed Sensor Right Malfunction in a Lexus causing the C1401 code?

Extreme weather conditions such as excessive heat or moisture can potentially impact the performance of the front speed sensor and trigger the C1401 code.

8. How much does it typically cost to repair the Front Speed Sensor Right Malfunction in a Lexus associated with the C1401 code?

The cost of repairing this issue can vary depending on the exact cause of the malfunction, but it may range from $200 to $500 for parts and labor.

9. Will disconnecting the battery reset the C1401 code related to the Front Speed Sensor Right Malfunction in a Lexus?

Disconnecting the battery may temporarily clear the error code, but if the underlying issue is not addressed, the code is likely to reappear once the system detects the problem again.

10. Is it necessary to visit a dealership for repairing the Front Speed Sensor Right Malfunction triggering the C1401 code in a Lexus?

While dealership service centers are equipped to handle such issues, independent auto repair shops with experience in ABS and traction control systems can also effectively diagnose and repair the problem.

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