Engine-Codes.com
Engine-Codes – Generic – C122C

C122C Code - Brake Booster Pedal Force Switch Circuit Supply Voltage

Quick Answer

The C122C diagnostic trouble code (DTC) refers to an issue with the Brake Booster Pedal Force Switch Circuit Supply Voltage. Common causes include Faulty brake booster pedal force switch, Wiring issues or harness damage in the circuit supplying voltage to the switch, Corrosion or poor connections 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
C122C indicates Brake Booster Pedal Force Switch Circuit Supply Voltage.
Common causes
Common causes include Faulty brake booster pedal force switch, Wiring issues or harness damage in the circuit supplying voltage to the switch, Corrosion or poor connections 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
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code C122C Description

The C122C diagnostic trouble code (DTC) refers to an issue with the Brake Booster Pedal Force Switch Circuit Supply Voltage. The brake booster pedal force switch is a component of the vehicle's braking system that monitors the force applied to the brake pedal by the driver. This information is crucial for the vehicle's electronic control units (ECUs) to determine the appropriate braking force to be applied.

OBDII Code C122C - Brake Booster Pedal Force Switch Circuit Supply Voltage
C122C Code - Brake Booster Pedal Force Switch Circuit Supply Voltage

Common Causes of C122C

  1. Faulty brake booster pedal force switch
  2. Wiring issues or harness damage in the circuit supplying voltage to the switch
  3. Corrosion or poor connections in the circuit
  4. Electrical system malfunctions or faults
  5. ECU (electronic control unit) issues

Symptoms of C122C

  1. Illumination of the brake warning light on the dashboard
  2. Decreased brake pedal responsiveness or sponginess
  3. Increased stopping distances
  4. ABS (anti-lock braking system) malfunction
  5. Loss of brake assist functionality

How to Fix C122C

  1. Diagnose the specific cause of the C122C code using a diagnostic scanner and multimeter to pinpoint the faulty component or circuit.
  2. Inspect the brake booster pedal force switch and replace it if found to be defective.
  3. Check the wiring harness for any damage, corrosion, or poor connections, and repair or replace as necessary.
  4. Test the circuit supplying voltage to the switch for proper operation and voltage levels, addressing any issues detected.
  5. Clear the DTC and test drive the vehicle to ensure that the issue has been resolved and that the brake system functions correctly.

Cost to Fix C122C

The typical repair costs for addressing the C122C code can vary depending on the specific cause of the issue and the labor rates in your area. Generally, repairing this brake booster pedal force switch circuit supply voltage issue can range from $150 to $400, including parts and labor. It's essential to consult with a professional mechanic or auto repair shop to get an accurate estimate based on your vehicle make and model, as well as the extent of the repair needed. Keep in mind that diagnostic time and labor rates can influence the overall cost, so it's advisable to inquire about these factors before proceeding with the repair.

Need more information about the C122C code?

Need more information on how to fix the C122C code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C122C code diagnosed by a professional: Find a repair shop in your area

Code C122C Information for Specific Makes

  • C122C Chrysler — Brake Booster Pedal Force Switch Circuit Supply Voltage
  • C122C Dodge — Brake Booster Pedal Force Switch Circuit Supply Voltage
  • C122C Jeep — Brake Booster Pedal Force Switch Circuit Supply Voltage
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 C122C Code

1. What are common symptoms of OBDII code C122C (Brake Booster Pedal Force Switch Circuit Supply Voltage)?

- Common symptoms include the brake warning light illuminating on the dashboard, inconsistent brake pedal feel, and potential loss of power brakes.

2. What are possible causes of OBDII code C122C?

- Possible causes include a faulty brake booster pedal force switch, damaged wiring or connectors in the circuit, low brake fluid level, or a malfunctioning brake booster.

3. How can I diagnose the source of OBDII code C122C?

- Use a diagnostic scanner to retrieve the code and check for any other related codes. Inspect the brake booster pedal force switch and its wiring for damage, and ensure the brake fluid level is adequate.

4. Can I still drive my vehicle with OBDII code C122C present?

- It is not recommended to drive the vehicle with this code present, as it may affect the performance of the braking system. Immediate attention and repair are advised.

5. How can I repair OBDII code C122C myself?

- If you have experience with automotive repairs, you can start by inspecting the brake booster pedal force switch, checking the wiring for any issues, and ensuring the brake fluid level is correct. However, professional diagnosis and repair may be necessary.

6. Is it safe to ignore OBDII code C122C?

- Ignoring this code can lead to potential brake system malfunctions, compromising the safety of your vehicle. It is recommended to address the issue promptly.

7. Can a low brake fluid level cause OBDII code C122C?

- Yes, a low brake fluid level can trigger this code as it may affect the proper functioning of the brake booster pedal force switch.

8. How much does it typically cost to repair OBDII code C122C at a mechanic?

- The cost of repairing this code can vary depending on the root cause of the issue and the labor rates of the mechanic. It is advisable to obtain estimates from different repair shops.

9. Will resetting the OBDII code C122C make it go away permanently?

- Resetting the code without addressing the underlying issue will not make it go away permanently. The problem must be diagnosed and repaired to prevent the code from reoccurring.

10. Can OBDII code C122C be intermittent or sporadic?

- Yes, this code can be intermittent, especially if the issue is related to a loose connection or a temporary fault. It is important to address intermittent codes promptly to prevent potential safety risks.

Discuss the causes and fixes for C122C OBDII Code

Submit a New Comment

Code C122C comments

No comments found for this page.