AutoCodes – Toyota – C1237 Toyota

C1237 Toyota Code - Speed Sensor Rotor Faulty

Quick Answer

The Skid Control ECU measures the speed of each wheel by receiving signals from the speed sensor. Common causes include Tire and wheel size, Tire deformation, Faulty Speed sensor rotor. 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: C1237 Toyota indicates Speed Sensor Rotor Faulty.
Common causes: Common causes include Tire and wheel size, Tire deformation, Faulty Speed sensor rotor.
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 25,508

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 Jul 28, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1237 Toyota Description

The Skid Control ECU measures the speed of each wheel by receiving signals from the speed sensor. These signals are used for recognizing that all four wheels are operating properly. Therefore, all wheel signals must be equal. The Diagnostic Trouble Code (DTC) will set when the Skid Control ECU detects a discrepancy among four wheel speed sensor output or abnormal pulse signals from 3 or more sensors.

OBDII Code C1237 Toyota - Speed Sensor Rotor Faulty - AutoCodes.com — C1237 Toyota Code - Speed Sensor Rotor Faulty

What does this mean?

What are the Possible Causes of the DTC C1237 Toyota?

Tire and wheel size
Tire deformation
Faulty Speed sensor rotor
Faulty Speed sensor
Faulty Skid control ECU (Brake Actuator Assembly)

How to Fix the DTC C1237 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1237 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 C1237 Toyota code?

Need more information on how to fix the C1237 Toyota code? Get Access to Factory Service Manuals

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Get the C1237 Toyota code diagnosed by a professional: Find a repair shop in your area

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 C1237 Toyota Code

1. What are the common symptoms of OBDII code C1237 in a Toyota related to a Speed Sensor Rotor Faulty?

The common symptoms include ABS warning light illuminated on the dashboard, traction control issues, and potential loss of stability control.

2. What typically causes the OBDII code C1237 in a Toyota indicating a Speed Sensor Rotor Faulty?

The code C1237 is usually triggered by a faulty speed sensor rotor, damaged wiring, or a malfunctioning ABS sensor.

3. How can I diagnose the Speed Sensor Rotor Faulty issue triggering the OBDII code C1237 in my Toyota?

Diagnosing the issue involves inspecting the speed sensor rotor for damage, checking the wiring for any faults, and using a diagnostic scanner to read the code and confirm the problem.

4. Can I continue driving my Toyota with the OBDII code C1237 related to a Speed Sensor Rotor Faulty?

It is not recommended to drive your Toyota with the C1237 code, as it can affect the vehicle's stability control and ABS functions, compromising safety.

5. How can I repair the Speed Sensor Rotor Faulty problem causing the OBDII code C1237 in my Toyota?

Repairing the issue involves replacing the faulty speed sensor rotor, repairing any damaged wiring, and clearing the trouble code from the vehicle's system.

6. Is it possible to reset the OBDII code C1237 related to a Speed Sensor Rotor Faulty without fixing the underlying issue?

Resetting the code without addressing the root cause will only temporarily turn off the warning light, but the issue will persist and may trigger the code again later.

7. Are there any DIY tips for troubleshooting the OBDII code C1237 in a Toyota due to a Speed Sensor Rotor Faulty?

While basic inspections like checking the sensor rotor and wiring can be done DIY, it's recommended to seek professional help for accurate diagnosis and repair.

8. Can extreme weather conditions impact the Speed Sensor Rotor Faulty issue leading to the OBDII code C1237 in a Toyota?

Extreme weather conditions like excessive heat or moisture can potentially worsen the speed sensor rotor's performance and trigger the C1237 code.

9. How much does it cost to fix the Speed Sensor Rotor Faulty issue causing the OBDII code C1237 in a Toyota?

The cost of fixing the issue can vary depending on the extent of the damage, but it typically involves replacing the speed sensor rotor and addressing any wiring problems.

10. Will fixing the Speed Sensor Rotor Faulty problem triggering the OBDII code C1237 in my Toyota improve overall driving safety?

Yes, resolving the issue and clearing the code will restore proper ABS and stability control functions, ensuring safer driving conditions for you and other road users.