AutoCodes – Lexus – C15C4 Lexus

C15C4 Lexus Code - Steering Angle Signal

Quick Answer

Signal transmission between the Steering Control ECU and steering angle sensor is performed via serial 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: C15C4 Lexus indicates Steering Angle Signal.
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 2,381

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 Nov 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C15C4 Lexus Description

Signal transmission between the Steering Control ECU and steering angle sensor is performed via serial communication. If an error occurs between them in serial communication, the ECU will store the Diagnostic Trouble Code (DTC) C15C4.

OBDII Code C15C4 Lexus - Steering Angle Signal - AutoCodes.com — C15C4 Lexus Code - Steering Angle Signal

What does this mean?

What are the Possible Causes of the DTC C15C4 Lexus?

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

How to Fix the DTC C15C4 Lexus?

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 C15C4 Lexus 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 C15C4 Lexus code?

Need more information on how to fix the C15C4 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 C15C4 Lexus Code

1. What are the common symptoms of OBDII code C15C4 Lexus (Steering Angle Signal)?

- Common symptoms include the traction control light or stability control light being illuminated on the dashboard, erratic steering behavior, and potential difficulty in controlling the vehicle.

2. What are the possible causes of OBDII code C15C4 Lexus (Steering Angle Signal)?

- The code C15C4 typically indicates a fault in the steering angle sensor, wiring issues related to the sensor, or a problem with the electronic stability control system.

3. How can I diagnose the OBDII code C15C4 Lexus (Steering Angle Signal)?

- Diagnosis involves using a professional OBDII scanner to read the code, checking the steering angle sensor's connections and wiring for any damage, and testing the sensor's output using a multimeter.

4. Can a faulty steering angle sensor cause the OBDII code C15C4 Lexus (Steering Angle Signal)?

- Yes, a faulty steering angle sensor can trigger the C15C4 code as it is responsible for providing crucial data to the vehicle's stability control system.

5. How can I repair the OBDII code C15C4 Lexus (Steering Angle Signal)?

- Repair options may include replacing the steering angle sensor, repairing any damaged wiring or connections, recalibrating the sensor, or resetting the vehicle's computer system.

6. Is it safe to drive with the OBDII code C15C4 Lexus (Steering Angle Signal)?

- It is not recommended to drive with the C15C4 code present, as it may affect the vehicle's stability control system, leading to potential safety risks.

7. Can a DIY enthusiast fix the OBDII code C15C4 Lexus (Steering Angle Signal)?

- While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing the C15C4 code may require professional expertise and specialized tools.

8. How much does it cost to repair the OBDII code C15C4 Lexus (Steering Angle Signal)?

- The cost of repairing the C15C4 code can vary depending on the exact cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

9. Will resetting the OBDII code C15C4 Lexus (Steering Angle Signal) make it go away permanently?

- Resetting the code without addressing the underlying issue will not make it go away permanently. It is crucial to diagnose and repair the root cause to prevent the code from reappearing.

10. Can extreme weather conditions trigger the OBDII code C15C4 Lexus (Steering Angle Signal)?

- Extreme weather conditions can potentially affect the steering angle sensor and its connections, leading to the triggering of the C15C4 code. Regular maintenance and inspection can help prevent such issues.