Engine-CodesDodge – U120C Dodge

U120C Dodge Code - Lost Brake Booster Signal

Quick Answer

The U120C Dodge code indicates that the vehicle's onboard computer has detected a lost signal from the brake booster. Common causes include Faulty brake booster sensor, Wiring issues or loose connections, ECM malfunction. 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 sensor, Wiring issues or loose connections, ECM malfunction.
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.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code U120C Dodge Description

The U120C Dodge code indicates that the vehicle's onboard computer has detected a lost signal from the brake booster. The brake booster is a crucial component of the braking system that amplifies the force applied to the brake pedal, making it easier to stop the vehicle. When the signal from the brake booster is lost, it can lead to a variety of issues that affect the vehicle's performance and safety.

OBDII Code U120C Dodge - Lost Brake Booster Signal
U120C Dodge Code - Lost Brake Booster Signal

Common Causes of U120C Dodge

  1. Faulty brake booster sensor
  2. Wiring issues or loose connections
  3. ECM malfunction
  4. Brake booster failure
  5. Low brake fluid levels

Symptoms of U120C Dodge

  1. Spongy or unresponsive brake pedal
  2. Increased stopping distance
  3. Brake assist not functioning properly
  4. Illuminated brake warning light on the dashboard

How to Fix U120C Dodge

  1. Begin by performing a visual inspection of the brake booster sensor and wiring to check for any visible damage or corrosion.
  2. Use a multimeter to test the brake booster sensor for proper voltage and continuity.
  3. If the sensor is faulty, replace it with a new one and ensure proper calibration.
  4. Check the wiring harness for any frayed or damaged wires, repairing or replacing them as needed.
  5. Clear the diagnostic trouble codes from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix U120C Dodge

The cost of repairing a lost brake booster signal can vary depending on the specific cause of the issue and the make and model of the vehicle. On average, the parts for this repair may range from $100 to $300, while the labor costs can add another $100 to $200. Overall, the total repair cost could be anywhere from $200 to $500. Keep in mind that these are rough estimates, and actual costs may differ based on the factors mentioned earlier. It's advisable to consult with a trusted mechanic or auto repair shop to get an accurate quote for this repair.

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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.

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