AutoCodesGeneric – C122A

C122A Code - Brake Booster Pedal Force Switch Circuit

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Brake Booster Pedal Force Switch. Common causes include Faulty Brake Booster Pedal Force Switch, Brake Booster Pedal Force Switch harness is open or shorted, Brake Booster Pedal Force Switch 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
C122A indicates Brake Booster Pedal Force Switch Circuit.
Common causes
Common causes include Faulty Brake Booster Pedal Force Switch, Brake Booster Pedal Force Switch harness is open or shorted, Brake Booster Pedal Force Switch 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 3,057
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 27, 2020
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Code C122A Description

The Anti-Lock Brake System (ABS) Module monitors the Brake Booster Pedal Force Switch. The ABS Module sets the OBDII code when the Brake Booster Pedal Force Switch is not to factory specifications.
OBDII Code C122A - Brake Booster Pedal Force Switch Circuit - AutoCodes.com
C122A Code - Brake Booster Pedal Force Switch Circuit

What are the Possible Causes of the DTC C122A?

  • Faulty Brake Booster Pedal Force Switch
  • Brake Booster Pedal Force Switch harness is open or shorted
  • Brake Booster Pedal Force Switch circuit poor electrical connection
  • Faulty Anti-Lock Brake System (ABS) Module

How to Fix the DTC C122A?

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 C122A 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.

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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 C122A Code

1. What does the OBDII code C122A mean?

C122A indicates an issue with the Brake Booster Pedal Force Switch Circuit, which monitors the force applied to the brake pedal to ensure proper braking performance.

2. What are the common symptoms of code C122A?

Symptoms may include the ABS or brake warning light illuminating, reduced braking performance, or the brake pedal feeling unusually soft or hard.

3. What causes the C122A code to trigger?

Common causes include a faulty brake booster pedal force switch, damaged wiring or connectors in the circuit, or a malfunctioning ABS module.

4. Can I drive with the C122A code present?

While the vehicle may still be drivable, it’s not recommended as braking performance could be compromised, increasing the risk of an accident.

5. How do I diagnose code C122A?

Diagnosis involves inspecting the brake booster pedal force switch, checking the wiring and connectors for damage, and using a scan tool to monitor switch operation.

6. How can I fix the C122A code?

Repairs may include replacing the faulty brake booster pedal force switch, repairing or replacing damaged wiring, or reprogramming the ABS module if necessary.

7. Is the C122A code related to the ABS system?

Yes, the code is related to the ABS system because the brake booster pedal force switch provides input critical for ABS functionality.

8. How much does it cost to fix the C122A code?

Repair costs vary but can range from $100 to $400 depending on whether the issue involves the switch, wiring, or ABS module.

9. Can a low brake fluid level cause the C122A code?

No, low brake fluid is unlikely to cause this specific code, but it’s always a good idea to check the fluid level when diagnosing brake issues.

10. Will clearing the C122A code with a scan tool fix the problem?

No, clearing the code will only remove it temporarily. The underlying issue must be resolved to prevent the code from returning.

Discuss the causes and fixes for C122A OBDII Code

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