[SOLVED] Chrysler U120C Code: Fix Lost Brake Booster Signal Fast

The OBD code U120C for Chrysler indicates an issue with the Brake Booster Pressure Sensor circuit.

Symptoms include the Engine Light being ON.

This code is commonly caused by a faulty Brake Booster Pressure Sensor or related wiring issues.

It is important to address promptly to ensure proper brake system operation.

A possible fix involves inspecting the sensor, wiring harness, and connectors for any damage or poor connections.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

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The vehicle displays a loss of communication with the fuel pump control module.

  • Symptoms: Service Electronic Throttle Control warning light may illuminate.
  • Loss of throttle response.
  • Engine may go into limp mode.
  • Engine may stall at idle.
  • Engine may have difficulty starting.

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Possible triggers for Chrysler U120C include faulty ABS module, wiring issues, or CAN bus communication problems.

  • U120C can be caused by a Faulty Brake Booster Pressure Sensor.
  • A Brake Booster Pressure Sensor harness that is open or shorted.
  • A Brake Booster Pressure Sensor circuit with poor electrical connection.
  • A Faulty Antilock Brake System (ABS) Module.

Address the communication issue between the vehicle’s network modules to resolve Chrysler U120C fault code.

  • To fix the Chrysler OBDII code U120C, start by reviewing the possible causes mentioned above.
  • Visually examine the wiring harness and connectors related to the ABS module.
  • Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
  • If no visible issues are found, proceed to test the ABS module for proper operation.
  • Reset the module or reprogram it if necessary.
  • Consider replacing the ABS module if all other steps do not resolve the U120C code.

The repair for Chrysler fault code U120C may involve diagnosing and fixing a communication issue.

The cost to diagnose and fix the Chrysler OBD code U120C depends on the estimated 1. 0hour repair time.

Labor rates usually range from $75 to $150 per hour, so the total cost could be between $75 and $150. The final cost may vary based on shop rates and the complexity of the repair.

Chrysler U120C code indicates a communication issue with the fuel pump control module.

Chrysler OBD code U120C means that a communication issue has been detected between the fuel pump control module and the PCM (Powertrain Control Module).

This code is triggered by the PCM when it does not receive the expected signal from the fuel pump control module over the CAN (Controller Area Network) bus.

This communication error can lead to drivability issues and potentially cause the vehicle to stall.

For Chrysler U120C code, refer to detailed information for diagnosis and repair guidance.

To diagnose and fix OBDII code U120C in a Chrysler vehicle, start by checking the Transmission Control Module (TCM) power and ground using a multimeter.

Verify TCM communication over the Controller Area Network (CAN) network with a scan tool.

If the TCM does not respond, reprogramming or reflashing may be necessary.

Visually inspect the wiring harness and connectors for any damage, and check connector pins for signs of being broken, bent, pushed out, or corroded.

Address any issues found during the inspection to resolve the U120C fault code.

1. What are the common symptoms associated with Chrysler OBD code U120C?

Common symptoms of Chrysler OBD code U120C include Engine Light ON, caused by issues like faulty Brake Booster Pressure Sensor or ABS Module. Inspect and repair related components and wiring.

2. How can I diagnose the root cause of code U120C in my Chrysler vehicle?

To diagnose code U120C in a Chrysler vehicle, check for a faulty brake booster pressure sensor, wiring issues, or a faulty ABS module. Inspect wiring and connectors for damage.

3. What are the typical repair options for resolving OBD code U120C in a Chrysler vehicle?

To resolve OBD code U120C in a Chrysler vehicle, check the brake booster pressure sensor, its harness, and ABS module for faults. Inspect wiring and connectors for damage.

Chrysler u120c error fault code explained

If your Chrysler is displaying OBDII code u120c, you may experience issues with the fuel level sensor circuit.

This could be caused by a faulty fuel level sensor, damaged wiring, or poor electrical connections in the fuel level sensor circuit.

To address Chrysler OBDII code u120c, start by inspecting the fuel level sensor and its wiring harness for any signs of damage or corrosion.

Test the sensor’s resistance and ensure all connectors are securely attached.

Replace the sensor if necessary and repair any wiring issues to resolve the fault.

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