AutoCodes – Toyota – C1274 Toyota

C1274 Toyota Code - Low Output Signal of Rear Speed Sensor Left

Quick Answer

The speed sensor detects the wheel speed and sends the appropriate signals to the Skid Control ECU (Brake Actuator Assembly). Common causes include Faulty Rear Speed Sensor Left (Rear Axle Hub and Bearing Assembly Left), Rear Speed Sensor Left Rotor (Rear Axle Hub and Bearing Assembly Left), Rear Speed Sensor Left harness is open or shorted. 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
C1274 Toyota indicates Low Output Signal of Rear Speed Sensor Left.
Common causes
Common causes include Faulty Rear Speed Sensor Left (Rear Axle Hub and Bearing Assembly Left), Rear Speed Sensor Left Rotor (Rear Axle Hub and Bearing Assembly Left), Rear Speed Sensor Left harness is open or shorted.
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 4,869
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 21, 2024
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Code C1274 Toyota Description

The speed sensor detects the wheel speed and sends the appropriate signals to the Skid Control ECU (Brake Actuator Assembly). These signals are used for Anti-Lock Brake System (ABS) control. Speed sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change when the rotors turn. Each speed sensor detects that magnetic change and sends a pulse signal to the Skid Control ECU (Brake Actuator Assembly).
OBDII Code C1274 Toyota - Low Output Signal of Rear Speed Sensor Left - AutoCodes.com
C1274 Toyota Code - Low Output Signal of Rear Speed Sensor Left

What are the Possible Causes of the DTC C1274 Toyota?

  • Faulty Rear Speed Sensor Left (Rear Axle Hub and Bearing Assembly Left)
  • Rear Speed Sensor Left Rotor (Rear Axle Hub and Bearing Assembly Left)
  • Rear Speed Sensor Left harness is open or shorted
  • Rear Speed Sensor Left circuit poor electrical connection

How to Fix the DTC C1274 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1274 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 C1274 Toyota code?

Need more information on how to fix the C1274 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Toyota Models

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 C1274 Toyota Code

1. What are the common symptoms of OBDII code C1274 Toyota (Low Output Signal of Rear Speed Sensor Left)?

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

2. What could cause the OBDII code C1274 Toyota to appear?

The code C1274 typically indicates a low output signal from the rear speed sensor on the left side of the vehicle. This can be caused by a faulty speed sensor, damaged wiring or connectors, or issues with the ABS module.

3. How can I diagnose the root cause of the OBDII code C1274 Toyota?

Diagnosing the code usually involves inspecting the rear left speed sensor for damage, checking the wiring and connectors for any issues, and using a diagnostic scan tool to read data from the ABS system.

4. Is it safe to drive with the OBDII code C1274 Toyota activated?

It is not recommended to drive with the C1274 code present, as it can affect the proper functioning of the ABS and traction control systems, potentially compromising vehicle safety.

5. Can I repair the OBDII code C1274 Toyota issue myself?

Depending on your level of automotive expertise, you may be able to replace the rear speed sensor on the left side yourself. However, diagnosing and repairing wiring or ABS module issues may require professional assistance.

6. How much does it typically cost to repair the OBDII code C1274 Toyota?

The cost of repairing the C1274 code can vary depending on the root cause of the issue. Replacing a speed sensor may cost around $100-$200, while fixing wiring or ABS module problems could be more expensive.

7. Are there any preventative maintenance tips to avoid the OBDII code C1274 Toyota?

Regularly inspecting the ABS system components, including the speed sensors and wiring, can help prevent issues that lead to the C1274 trouble code.

8. Can the OBDII code C1274 Toyota affect other systems in the vehicle?

Yes, since the ABS and traction control systems are interconnected, a malfunction indicated by the C1274 code can impact overall vehicle stability and safety.

9. How urgent is it to address the OBDII code C1274 Toyota once it appears?

It is recommended to address the C1274 code promptly to ensure the proper functioning of the ABS and traction control systems, maintaining the safety and stability of the vehicle.

10. Is resetting the OBDII code C1274 Toyota sufficient, or should I seek professional repairs?

Resetting the code may temporarily turn off the warning light, but it will not fix the underlying issue causing the code. It is advisable to seek professional repairs to address the root cause effectively.

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