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Engine-Codes – Generic – C123B

C123B Code - ESP System Control Too Long

Quick Answer

The C123B code indicates that the Electronic Stability Program (ESP) system control has been active for an extended period, exceeding the predetermined time limit. Common causes include Malfunctioning wheel speed sensors, Faulty steering angle sensor, Defective yaw rate sensor. 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
C123B indicates ESP System Control Too Long.
Common causes
Common causes include Malfunctioning wheel speed sensors, Faulty steering angle sensor, Defective yaw rate sensor.
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 08, 2024
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Code C123B Description

The C123B code indicates that the Electronic Stability Program (ESP) system control has been active for an extended period, exceeding the predetermined time limit. The ESP system is designed to enhance vehicle stability by detecting and reducing skidding or loss of traction. When the control of the ESP system runs too long, it may indicate a potential issue with the system's sensors, actuators, or control module.

OBDII Code C123B - ESP System Control Too Long
C123B Code - ESP System Control Too Long

Common Causes of C123B

  1. Malfunctioning wheel speed sensors
  2. Faulty steering angle sensor
  3. Defective yaw rate sensor
  4. Failing ESP control module
  5. Wiring issues or poor connections within the ESP system

Symptoms of C123B

  1. Illumination of the ESP warning light on the dashboard
  2. Loss of stability or traction control while driving
  3. Increased difficulty in steering or controlling the vehicle
  4. Tires skidding or slipping unexpectedly
  5. ABS (anti-lock braking system) activation when not needed

How to Fix C123B

  1. Diagnose the specific cause of the C123B code using a professional OBD-II scanner or diagnostic tool.
  2. Inspect and test the wheel speed sensors, steering angle sensor, yaw rate sensor, and control module for proper functionality.
  3. Repair or replace any faulty components identified during the diagnostic process.
  4. Clear the code from the vehicle's computer system and reset the ESP system.
  5. Test drive the vehicle to ensure that the ESP system is functioning correctly and that the code does not reappear.

Cost to Fix C123B

The cost of repairing the ESP System Control Too Long issue can vary depending on the specific cause of the problem and the extent of the repairs needed. On average, the repair costs for this type of issue can range from $200 to $800, including parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops often offer more affordable prices. To get an accurate estimate, it's recommended to consult with local auto repair shops in your area.

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Code C123B 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 C123B Code

1. What does OBDII code C123B mean?

- OBDII code C123B stands for "ESP System Control Too Long," indicating a fault in the Electronic Stability Program (ESP) system of the vehicle.

2. What are the common symptoms of OBDII code C123B?

- Common symptoms of code C123B may include the ESP warning light illuminating on the dashboard, stability control system malfunctions, and potential traction issues.

3. What are the possible causes of OBDII code C123B?

- The main causes of code C123B can be a faulty ESP module, damaged wheel speed sensors, wiring issues in the ESP system, or a malfunctioning steering angle sensor.

4. How can I diagnose OBDII code C123B?

- To diagnose code C123B, a professional diagnostic scanner is usually required to retrieve the specific fault codes within the ESP system and pinpoint the underlying issue.

5. Can I still drive my vehicle with OBDII code C123B?

- It is not recommended to drive the vehicle with code C123B present, as the Electronic Stability Program is a crucial safety feature that may not function properly, increasing the risk of accidents.

6. How can I repair OBDII code C123B?

- Repairing code C123B typically involves addressing the root cause, which could be replacing a faulty ESP module, repairing wiring connections, or fixing or replacing sensors within the ESP system.

7. Is it possible to reset OBDII code C123B without repairs?

- While you may be able to clear the code temporarily, it is crucial to address the underlying issue causing code C123B to prevent the problem from recurring and ensure the proper functioning of the ESP system.

8. Are there any DIY tips for fixing OBDII code C123B?

- DIY tips for addressing code C123B may include checking and cleaning the wheel speed sensors, inspecting wiring for damage, and ensuring proper connections in the ESP system.

9. How much does it cost to repair OBDII code C123B at a mechanic?

- The cost of repairing code C123B can vary depending on the specific issue and labor rates, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can OBDII code C123B affect other systems in the vehicle?

- While code C123B specifically relates to the ESP system, if left unresolved, it may affect other systems that rely on data from the ESP system, potentially leading to further complications.

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