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C1412 Lexus Code - Rear Speed Sensor Left Performance

Quick Answer

The C1412 diagnostic trouble code for Lexus vehicles refers to an issue with the rear speed sensor on the left side of the vehicle. Common causes include Faulty rear speed sensor, Damaged wiring or connectors, Corrosion or water intrusion in the sensor. 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
C1412 Lexus indicates Rear Speed Sensor Left Performance.
Common causes
Common causes include Faulty rear speed sensor, Damaged wiring or connectors, Corrosion or water intrusion in the sensor.
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 11, 2024
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Code C1412 Lexus Description

The C1412 diagnostic trouble code for Lexus vehicles refers to an issue with the rear speed sensor on the left side of the vehicle. The speed sensor is a crucial component of the anti-lock braking system (ABS) and traction control system, responsible for measuring the speed of the wheel and sending this information to the vehicle's electronic control unit (ECU). When the ECU detects a performance issue with the rear speed sensor on the left side, it can lead to inaccurate speed readings, potentially affecting the vehicle's ABS and traction control systems.

OBDII Code C1412 Lexus - Rear Speed Sensor Left Performance
C1412 Lexus Code - Rear Speed Sensor Left Performance

Common Causes of C1412 Lexus

  1. Faulty rear speed sensor
  2. Damaged wiring or connectors
  3. Corrosion or water intrusion in the sensor
  4. ABS control module malfunction
  5. Physical damage to the sensor or its wiring

Symptoms of C1412 Lexus

  1. ABS warning light illuminated on the dashboard
  2. Traction control system malfunction indicator
  3. Erratic braking behavior, such as pulsating brake pedal
  4. Vehicle stability issues, especially during braking or cornering
  5. Increased stopping distances on slippery surfaces

How to Fix C1412 Lexus

  1. Connect a diagnostic scan tool to retrieve the specific error code and confirm the issue with the rear speed sensor.
  2. Inspect the rear speed sensor, wiring, and connectors for any visible damage or corrosion. Replace any faulty components as needed.
  3. Clear the error code from the ECU and perform a road test to verify that the ABS and traction control systems are functioning correctly.
  4. If the issue persists, further diagnosis may be required to check for underlying problems with the ABS control module or other related components.
  5. Once the root cause is identified, repair or replace the defective parts and recalibrate the ABS system to ensure proper functionality.

Cost to Fix C1412 Lexus

The cost of repairing a rear speed sensor left performance issue on a Lexus vehicle can vary depending on the specific cause of the problem and the labor rates in your area. On average, replacing a rear speed sensor can cost between $100 to $300 for the part, with additional labor costs ranging from $100 to $300. Overall, you can expect to pay anywhere from $200 to $600 for this repair, but prices may be higher at dealerships or in metropolitan areas. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate for your specific vehicle. Remember that additional diagnostic time and potential part replacements may impact the final cost.

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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 C1412 Lexus Code

1. What are the common symptoms of OBDII code C1412 in a Lexus related to the Rear Speed Sensor Left Performance?

- Common symptoms include erratic speedometer readings, ABS warning light illuminated on the dashboard, and potential traction control issues.

2. What are the possible causes of OBDII code C1412 in a Lexus indicating Rear Speed Sensor Left Performance?

- The code may be triggered by a faulty rear speed sensor, damaged wiring or connectors, sensor misalignment, or issues with the ABS module.

3. How can I diagnose the root cause of OBDII code C1412 in my Lexus pertaining to the Rear Speed Sensor Left Performance?

- Diagnosis involves visually inspecting the sensor and its connections, checking for wiring damage, conducting electrical tests, and using a scan tool to monitor sensor data.

4. Can a DIY enthusiast repair OBDII code C1412 related to the Rear Speed Sensor Left Performance in a Lexus?

- Repairing this issue often requires advanced automotive knowledge and specialized tools, so it is recommended to consult a professional mechanic for accurate diagnosis and repair.

5. Is it safe to continue driving my Lexus with OBDII code C1412 indicating Rear Speed Sensor Left Performance?

- It is not recommended to drive the vehicle with this code present, as it can affect the proper functioning of the ABS and traction control systems, compromising overall safety.

6. Are there any temporary solutions or quick fixes for OBDII code C1412 in a Lexus regarding Rear Speed Sensor Left Performance?

- Temporary solutions like clearing the code may make the warning lights disappear temporarily, but the underlying issue causing the fault will still need to be addressed.

7. How much does it typically cost to repair OBDII code C1412 related to the Rear Speed Sensor Left Performance in a Lexus?

- Repair costs can vary depending on the exact cause of the issue, but expect to pay for sensor replacement, wiring repairs, and labor, which can range from a few hundred to over a thousand dollars.

8. Can extreme weather conditions or road debris trigger OBDII code C1412 in a Lexus for Rear Speed Sensor Left Performance?

- Yes, harsh weather conditions, road debris, or water ingress can potentially damage the speed sensor or its connections, leading to the triggering of this fault code.

9. Are there any recalls or technical service bulletins related to OBDII code C1412 in Lexus models concerning Rear Speed Sensor Left Performance?

- It's advisable to check with a Lexus dealership or the manufacturer's website for any recalls or technical service bulletins specifically addressing this OBDII code and related issues.

10. How long does it typically take for a professional mechanic to repair OBDII code C1412 in a Lexus for Rear Speed Sensor Left Performance?

- The repair time can vary based on the exact cause of the issue, but most experienced mechanics can diagnose and repair this problem within a few hours to a day, depending on parts availability.

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