AutoCodes – Generic – C122D

C122D Code - Active Brake Booster Control Circuit

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Active Brake Booster Solenoid. Common causes include Faulty Active Brake Booster Solenoid, Active Brake Booster Solenoid harness is open or shorted, Active Brake Booster Solenoid 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: C122D indicates Active Brake Booster Control Circuit.
Common causes: Common causes include Faulty Active Brake Booster Solenoid, Active Brake Booster Solenoid harness is open or shorted, Active Brake Booster Solenoid 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 2,686

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 Aug 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C122D Description

The Anti-Lock Brake System (ABS) Module monitors the Active Brake Booster Solenoid. The ABS Module sets the OBDII code when the Active Brake Booster Solenoid is not to factory specifications.

OBDII Code C122D - Active Brake Booster Control Circuit - AutoCodes.com — C122D Code - Active Brake Booster Control Circuit

What does this mean?

What are the Possible Causes of the DTC C122D?

Faulty Active Brake Booster Solenoid
Active Brake Booster Solenoid harness is open or shorted
Active Brake Booster Solenoid circuit poor electrical connection
Faulty Brake Travel Sensor
Faulty Anti-Lock Brake System (ABS) Module

How to Fix the DTC C122D?

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 C122D 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 C122D code?

Need more information on how to fix the C122D code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C122D code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C122D Chrysler — Active Brake Booster Control Circuit
C122D Dodge — Active Brake Booster Control Circuit
C122D Jeep — Active Brake Booster Control Circuit

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 C122D Code

1. What are common symptoms of OBDII code C122D (Active Brake Booster Control Circuit)?

- Common symptoms include a hard brake pedal, loss of power brakes, illuminated brake warning light, and potential decrease in braking performance.

2. What are the possible causes of OBDII code C122D?

- The code C122D can be triggered by issues such as a faulty active brake booster control module, damaged wiring or connectors in the circuit, or a malfunctioning brake booster pump motor.

3. How can I diagnose the cause of OBDII code C122D?

- Diagnosing the code typically involves using a diagnostic scanner to retrieve the specific fault code, conducting a visual inspection of the wiring and connectors, and performing tests on the brake booster control module and associated components.

4. Can OBDII code C122D be repaired at home?

- Repairing OBDII code C122D may require advanced diagnostic tools and expertise due to its association with the brake system. It is recommended to seek professional help for accurate diagnosis and repair.

5. Is it safe to drive with OBDII code C122D present?

- It is not recommended to drive with OBDII code C122D present, as it can affect the proper functioning of the brake system, potentially compromising vehicle safety.

6. How much does it typically cost to repair OBDII code C122D?

- The cost of repairing OBDII code C122D can vary depending on the underlying cause of the issue, the extent of the repairs needed, and labor rates. It is advisable to obtain quotes from reputable repair shops.

7. Can resetting the OBDII system clear code C122D?

- Resetting the OBDII system may temporarily clear the code C122D, but if the underlying issue is not addressed, the code is likely to return. It is important to diagnose and repair the root cause of the problem.

8. Are there any preventative maintenance tips to avoid OBDII code C122D?

- Keeping up with regular brake system maintenance, such as brake fluid checks and replacements, can help prevent issues that may trigger OBDII code C122D.

9. How long does it take to repair OBDII code C122D?

- The repair time for OBDII code C122D can vary depending on the specific cause of the issue and the complexity of the repair. It is best to consult with a professional technician for an accurate estimate.

10. Can OBDII code C122D affect other vehicle systems?

- OBDII code C122D specifically relates to the active brake booster control circuit and may not directly affect other vehicle systems. However, addressing the issue promptly is essential to prevent potential safety hazards.