Engine-Codes.com
Engine-Codes – Generic – C1412

C1412 Code - Rear Speed Sensor Left Performance

Quick Answer

The C1412 code indicates a problem with the rear speed sensor on the left side of the vehicle. Common causes include Faulty rear speed sensor, Damaged or corroded wiring or connectors, Issues with the ABS or traction control systems. 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 indicates Rear Speed Sensor Left Performance.
Common causes
Common causes include Faulty rear speed sensor, Damaged or corroded wiring or connectors, Issues with the ABS or traction control systems.
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 07, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code C1412 Description

The C1412 code indicates a problem with the rear speed sensor on the left side of the vehicle. This sensor is responsible for monitoring the speed of the wheels and providing that information to the vehicle's ABS (anti-lock braking system) and traction control system. When the sensor is not functioning properly, it can lead to issues with the vehicle's stability, braking performance, and overall safety.

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

Common Causes of C1412

  1. Faulty rear speed sensor
  2. Damaged or corroded wiring or connectors
  3. Issues with the ABS or traction control systems
  4. Electronic control unit (ECU) malfunction
  5. Mechanical damage to the sensor or related components

Symptoms of C1412

  1. ABS warning light illuminated on the dashboard
  2. Traction control system malfunction
  3. Erratic or inconsistent braking behavior
  4. Increased stopping distances
  5. Vehicle stability concerns, especially during braking or on slippery surfaces

How to Fix C1412

  1. Begin by performing a comprehensive diagnostic scan to confirm the C1412 code and pinpoint the exact cause of the issue.
  2. Inspect the rear speed sensor, wiring, and connectors for any visible damage or corrosion. Replace any faulty components as needed.
  3. Test the sensor's functionality using a multimeter or oscilloscope to ensure it is sending accurate speed signals.
  4. Reset the ABS and traction control systems to clear the code and recalibrate the sensors.
  5. Test drive the vehicle to confirm that the issue has been resolved and that the ABS and traction control systems are functioning properly.

Cost to Fix C1412

The typical repair costs for addressing a C1412 code may range from $150 to $300, including parts and labor. However, it's important to note that specific diagnosis time and labor rates can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships, while independent shops may offer lower prices. For a more accurate estimate, it's recommended to check local rates before proceeding with the repair.

Need more information about the C1412 code?

Need more information on how to fix the C1412 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1412 code diagnosed by a professional: Find a repair shop in your area

Code C1412 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 C1412 Code

1. What does the OBDII code C1412 indicate?

The C1412 code signifies an issue with the left rear wheel speed sensor's performance, suggesting that the sensor might not be functioning correctly or the signal it is sending is outside the expected range.

2. What are common symptoms of code C1412?

Symptoms can include the ABS warning light illuminating on the dashboard, decreased anti-lock brake system functionality, possible traction control problems, and in some cases, the vehicle’s speedometer may malfunction.

3. What could cause the C1412 code to appear?

Possible causes include a faulty left rear wheel speed sensor, damaged wires or connectors associated with the sensor, or a problem with the wheel hub assembly that affects the sensor's ability to read wheel speed accurately.

4. How can I diagnose the issue related to code C1412?

Diagnosis should start with a visual inspection of the left rear wheel speed sensor and its connections for any obvious signs of damage or corrosion. Following that, using a scan tool, check the live data of the wheel speed sensors to compare their readings. A multimeter can be used to test the sensor's resistance and voltage.

5. What are some potential repairs for fixing code C1412?

Repairs can range from cleaning the sensor and the sensor ring from any dirt, debris, or corrosion, securing any loose connections, or replacing the left rear wheel speed sensor if found defective. In cases where wiring is damaged, repairing or replacing the affected wiring is necessary.

6. Can I drive my vehicle with the C1412 code active?

While you can technically still drive the vehicle, it's advisable to address the issue promptly as it affects the anti-lock braking system, which can compromise vehicle safety, particularly under harsh braking conditions or on slippery roads.

7. What tools are needed to confirm a diagnosis for code C1412?

To properly diagnose this issue, you would need a digital multimeter, a scan tool capable of reading ABS codes and viewing live data, and basic hand tools to access the sensor.

8. Are there any troubleshooting steps specifically for intermittent C1412 code issues?

For intermittent issues, it's important to check for loose connections or damaged wires at the sensor as these can cause sporadic faults. Also, check the sensor’s alignment and the condition of the sensor ring as any abnormalities in these can cause intermittent readings.

9. How does the left rear speed sensor impact vehicle performance when malfunctioning?

A malfunctioning left rear speed sensor can lead to inaccurate readings that affect the ABS and traction control systems, potentially leading to increased stopping distances, reduced braking effectiveness, and an increased risk of skidding during braking.

10. What preventive measures can be taken to avoid future issues with the left rear speed sensor?

Regular maintenance including cleaning of the wheel speed sensors, checking for and repairing any damaged wiring, and ensuring all sensor connections are secure can help prevent future issues with the left rear speed sensor.

Discuss the causes and fixes for C1412 OBDII Code

Submit a New Comment

Code C1412 comments

No comments found for this page.