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Engine-Codes – Generic – C122B

C122B Code - Brake Booster Pedal Force Switch Circuit Performace

Quick Answer

The C122B diagnostic trouble code refers to the Brake Booster Pedal Force Switch Circuit Performance. Common causes include Faulty brake booster pedal force switch, Damaged wiring or connectors in the brake booster pedal force switch circuit, Corrosion or moisture in the circuit. 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
C122B indicates Brake Booster Pedal Force Switch Circuit Performace.
Common causes
Common causes include Faulty brake booster pedal force switch, Damaged wiring or connectors in the brake booster pedal force switch circuit, Corrosion or moisture in the circuit.
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 09, 2024
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Code C122B Description

The C122B diagnostic trouble code refers to the Brake Booster Pedal Force Switch Circuit Performance. The brake booster pedal force switch is a component in the braking system that measures the force applied to the brake pedal by the driver. This information is crucial for the vehicle's braking system to operate effectively and efficiently. When this circuit's performance is compromised, it can lead to issues with the vehicle's braking capabilities.

OBDII Code C122B - Brake Booster Pedal Force Switch Circuit Performace
C122B Code - Brake Booster Pedal Force Switch Circuit Performace

Common Causes of C122B

  1. Faulty brake booster pedal force switch
  2. Damaged wiring or connectors in the brake booster pedal force switch circuit
  3. Corrosion or moisture in the circuit
  4. ECU malfunction affecting the brake booster pedal force switch
  5. Electrical issues within the braking system

Symptoms of C122B

  1. Illumination of the brake warning light on the dashboard
  2. Increased brake pedal travel or sponginess
  3. Difficulty in applying brakes or brakes feeling "stiff"
  4. Inaccurate or erratic readings on the brake force distribution system
  5. ABS system malfunction or failure

How to Fix C122B

  1. Diagnose the issue using a diagnostic scanner to pinpoint the exact cause of the problem.
  2. Inspect the brake booster pedal force switch and its circuit for any visible damage or corrosion.
  3. Test the switch's functionality using a multimeter to determine if it is sending accurate readings to the ECU.
  4. Replace the brake booster pedal force switch if it is found to be faulty.
  5. Repair or replace any damaged wiring or connectors in the circuit.

Cost to Fix C122B

The cost of repairing a C122B code related to the brake booster pedal force switch circuit performance can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost can range from $150 to $500. It is advisable to consult with a trusted mechanic or auto repair shop to get an accurate estimate based on your vehicle's make and model, as well as the local labor rates.

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Code C122B Information for Specific Makes

  • C122B Chrysler — Brake Booster Pedal Force Switch Circuit Performace
  • C122B Dodge — Brake Booster Pedal Force Switch Circuit Performace
  • C122B Jeep — Brake Booster Pedal Force Switch Circuit Performace
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 C122B Code

1. What are the common symptoms of OBDII code C122B (Brake Booster Pedal Force Switch Circuit Performance)?

- Common symptoms include the illumination of the check engine light, issues with brake pedal feel or response, and potential loss of power brakes.

2. What are some possible causes of OBDII code C122B?

- Possible causes include a faulty brake booster pedal force switch, wiring issues in the circuit, a malfunctioning brake booster, or a problem with the brake pedal position sensor.

3. How can I diagnose the cause of OBDII code C122B?

- Diagnosis typically involves using a scan tool to read the code, inspecting the brake booster pedal force switch and related wiring for damage or corrosion, and testing the switch's functionality.

4. Can I still drive my vehicle with OBDII code C122B present?

- It is not recommended to drive your vehicle with this code present, as it can affect the proper functioning of the brake system and compromise safety. It is best to address the issue promptly.

5. How can I repair OBDII code C122B?

- Repairing this code may involve replacing the brake booster pedal force switch, repairing any damaged wiring, addressing issues with the brake booster or pedal position sensor, and clearing the code with a scan tool.

6. Are there any DIY tips for troubleshooting OBDII code C122B?

- DIY tips may include visually inspecting the brake booster pedal force switch and wiring for any obvious signs of damage, ensuring proper connections, and checking for any loose or disconnected components.

7. Is it necessary to visit a mechanic for OBDII code C122B?

- While some DIY troubleshooting may be possible, it is recommended to have a professional mechanic diagnose and repair OBDII code C122B to ensure the issue is properly addressed and the brake system functions correctly.

8. Can OBDII code C122B be intermittent?

- Yes, this code can sometimes be intermittent, depending on the underlying cause. It is important to address intermittent issues promptly to prevent potential safety hazards.

9. How long does it typically take to repair OBDII code C122B?

- The repair time can vary depending on the specific cause of the code and the extent of the issue. It may take anywhere from an hour to several hours to diagnose and repair OBDII code C122B.

10. Is it safe to reset the check engine light after repairing OBDII code C122B?

- Yes, once the underlying issue causing OBDII code C122B has been repaired, it is safe to reset the check engine light using a scan tool to clear the code and ensure proper functioning of the brake system.

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