AutoCodes – Toyota – C1231 Toyota

C1231 Toyota Code - Steering Angle Sensor Circuit Malfunction

Quick Answer

The Skid Control ECU inputs the steering sensor signal through the CAN communication. Common causes include Faulty Steering Angle Sensor, Steering Angle Sensor harness is open or shorted, Steering Angle Sensor circuit poor electrical connection. 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: C1231 Toyota indicates Steering Angle Sensor Circuit Malfunction.
Common causes: Common causes include Faulty Steering Angle Sensor, Steering Angle Sensor harness is open or shorted, Steering Angle Sensor circuit poor electrical connection.
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 39,400

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 Aug 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1231 Toyota Description

The Skid Control ECU inputs the steering sensor signal through the CAN communication. The Skid Control ECU sets the OBDII code when a malfunction occurs in the communication line with the steering sensor.

OBDII Code C1231 Toyota - Steering Angle Sensor Circuit Malfunction - AutoCodes.com — C1231 Toyota Code - Steering Angle Sensor Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC C1231 Toyota?

Faulty Steering Angle Sensor
Steering Angle Sensor harness is open or shorted
Steering Angle Sensor circuit poor electrical connection
Faulty Skid Control ECU

How to Fix the DTC C1231 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 C1231 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 C1231 Toyota code?

Need more information on how to fix the C1231 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1231 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 C1231 Toyota Code

1. What are common symptoms of OBDII code C1231 in a Toyota related to the steering angle sensor circuit malfunction?

- Common symptoms include the traction control light or ABS light illuminating on the dashboard, stability control issues, and potential loss of power steering assistance.

2. What are possible causes of the C1231 code in a Toyota?

- Possible causes of the C1231 code include a faulty steering angle sensor, damaged wiring or connectors in the steering angle sensor circuit, or issues with the ABS module.

3. How can I diagnose the Steering Angle Sensor Circuit Malfunction in my Toyota?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific trouble code, inspecting the steering angle sensor and its connections for damage, and checking for any loose or corroded wiring.

4. Can I still drive my Toyota with the C1231 code present?

- It is not recommended to drive the vehicle with the C1231 code present, as it can affect the proper function of the stability control system and potentially compromise safety.

5. How can I reset the C1231 code in my Toyota after repairing the steering angle sensor circuit malfunction?

- After repairing the issue causing the C1231 code, you can reset the code using an OBDII scanner or by disconnecting the car's battery for a few minutes to clear the error code.

6. Is it possible to repair the steering angle sensor circuit malfunction in my Toyota myself?

- Depending on your automotive repair skills and access to tools, you may be able to repair the issue causing the C1231 code yourself by replacing the faulty steering angle sensor or repairing damaged wiring.

7. How much does it typically cost to repair the steering angle sensor circuit malfunction in a Toyota?

- The cost of repairing the C1231 code can vary depending on the cause of the issue, but it may range from a few hundred to a thousand dollars if professional diagnostic and repair services are required.

8. Are there any preventive measures to avoid the C1231 code in my Toyota?

- Regular maintenance and inspections of the steering angle sensor and related components can help prevent the occurrence of the C1231 code. Avoiding harsh driving conditions that could damage these components is also advisable.

9. Will the C1231 code cause my Toyota to fail an emissions test?

- The C1231 code itself may not cause your Toyota to fail an emissions test, but if left unresolved, it could lead to other issues that affect the vehicle's emissions control system.

10. Can the C1231 code be related to other problems in my Toyota, or is it isolated to the steering angle sensor circuit malfunction?

- While the C1231 code specifically points to a steering angle sensor circuit malfunction, it can sometimes be related to or trigger other issues in the vehicle's stability control or ABS system.