AutoCodes – Dodge – U120C Dodge

U120C Dodge Code - Lost Brake Booster Signal

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the Powertrain Control Module (PCM) doesn't receive a brake booster vacuum signal from the Anti-lock Brake System (ABS) Module over the Controller Area Network (CAN) C bus. Common causes include Faulty Brake Booster Pressure Sensor, Brake Booster Pressure Sensor harness is open or shorted, Brake Booster Pressure Sensor 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: U120C Dodge indicates Lost Brake Booster Signal.
Common causes: Common causes include Faulty Brake Booster Pressure Sensor, Brake Booster Pressure Sensor harness is open or shorted, Brake Booster Pressure Sensor 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 2,051

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 May 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U120C Dodge Description

OBDII Code U120C Dodge - Lost Brake Booster Signal - AutoCodes.com — U120C Dodge Code - Lost Brake Booster Signal

What does this mean?

What are the Possible Causes of the DTC U120C Dodge?

Faulty Brake Booster Pressure Sensor
Brake Booster Pressure Sensor harness is open or shorted
Brake Booster Pressure Sensor circuit poor electrical connection
Faulty Anti-lock Brake System (ABS) Module

How to Fix the DTC U120C Dodge?

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 U120C Dodge 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 U120C Dodge code?

Need more information on how to fix the U120C Dodge code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U120C Dodge code diagnosed by a professional: Find a repair shop in your area

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 U120C Dodge Code

1. What are the common symptoms of OBDII code U120C (Lost Brake Booster Signal) in a Dodge?

- Common symptoms include loss of power brakes, illuminated brake warning light on the dashboard, and potentially reduced brake performance.

2. What can cause the U120C code to trigger in a Dodge?

- The U120C code is typically triggered by a malfunction in the brake booster sensor circuit, which may be caused by wiring issues, a faulty brake booster sensor, or a problem with the brake booster itself.

3. How serious is the U120C code in a Dodge?

- The U120C code is a serious issue as it can affect the operation of the power brake system, potentially compromising the vehicle's braking performance and safety.

4. Can driving with the U120C code in a Dodge be dangerous?

- Driving with the U120C code present can be dangerous, as it may lead to reduced braking power or failure of the power brake system. It is recommended to address this issue promptly.

5. How can the U120C code in a Dodge be diagnosed?

- Diagnosing the U120C code typically involves using a diagnostic scanner to retrieve the code, inspecting the brake booster sensor circuit, checking for wiring issues, and testing the brake booster sensor.

6. What are some common repair tips for resolving the U120C code in a Dodge?

- Repair tips may include checking and repairing any damaged wiring, replacing the brake booster sensor if necessary, ensuring proper connections, and testing the brake booster for proper operation.

7. Can the U120C code in a Dodge be fixed without professional help?

- While some DIY enthusiasts may be able to address the U120C code by checking wiring and connections, diagnosing and repairing issues related to the brake booster sensor may require professional expertise.

8. How much does it typically cost to repair the U120C code in a Dodge?

- The cost of repairing the U120C code can vary depending on the underlying issue, but it may involve expenses for parts replacement, labor costs, and diagnostic fees. It is recommended to obtain quotes from trusted mechanics.

9. What should I do if the U120C code keeps coming back after repairs in a Dodge?

- If the U120C code keeps reappearing after repairs, it may indicate that the underlying issue was not fully resolved. In such cases, it is advisable to have the vehicle rechecked by a professional technician.

10. Is it safe to continue driving my Dodge with the U120C code unresolved?

- It is not safe to continue driving a Dodge with the U120C code unresolved, as it can lead to brake-related issues that compromise the vehicle's safety. It is recommended to address the problem promptly.