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

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

Symptoms include the Engine Light being ON.

The cause could be a faulty sensor, wiring harness issues, or a problem with the ABS Module.

This is a moderate issue that should be addressed promptly.

A possible fix is to inspect and repair any damaged components or wiring connections related to the sensor circuit.

Repair Importance Level	10.0 (Out of 10)
Estimated Repair Time	Approximately 1.0 hour
Repair Difficulty Level	10.0 (Out of 10)

Symptoms of the Jeep u120c OBD Code

The Jeep U120C fault code indicates a communication issue with the fuel pump control module.

Symptoms: Service Electronic Throttle Control warning light may illuminate.
Engine may go into limp mode.
Vehicle may experience a lack of power.
Engine may not respond properly to throttle input.

Causes of the Jeep u120c OBD Code

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Possible triggers for Jeep 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.

Fixing Jeep Error Code u120c Step By Step

Resolve the Jeep U120C code by inspecting the wiring and connectors for any faults or damage.

To fix the Jeep 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 issues are found with the wiring and connectors, proceed to reset the ABS module using a diagnostic scan tool.
After resetting the module, clear the fault code and test drive the vehicle to see if the code returns.
If the code persists, consider replacing the ABS module with a new or remanufactured unit.

Cost Of Fixing Jeep u120c Fault Code

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

The cost to diagnose and fix Jeep 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. Factors like shop rates and diagnostic complexity can affect the final cost.

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Details of the Jeep u120c OBD Code

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

OBD code U120C for Jeep vehicles indicates a communication issue with the fuel pump control module.

This code is triggered by the Powertrain Control Module (PCM) when it detects a lack of communication with the fuel pump control module over the Controller Area Network (CAN) bus.

The fuel pump control module is responsible for controlling the operation of the fuel pump based on input from the PCM and other sensors.

When communication is lost between the PCM and the fuel pump control module, the U120C code is set, indicating a potential problem with the fuel pump control module or the CAN bus communication network.

Mechanic’s Tech Notes

This section provides detailed information on the Jeep U120C fault code.

To diagnose and fix OBDII code Jeep U120C, 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, focusing on broken, bent, or corroded pins.

Ensure all connections are secure.

If the issue persists, consider consulting a professional for further diagnostics or TCM replacement.

FAQ

1. What does OBD code U120C mean in a Jeep vehicle?

OBD code U120C in a Jeep indicates an issue with the Brake Booster Pressure Sensor. Check sensor, wiring, and connectors for faults to resolve.

2. What are the common symptoms associated with code U120C in a Jeep?

Code U120C in a Jeep may cause the Engine Light to come on. Common causes include issues with the Brake Booster Pressure Sensor and related wiring.

3. How can I diagnose and fix OBD code U120C in my Jeep vehicle?

Diagnose U120C in Jeep: Check Brake Booster Pressure Sensor, harness, ABS Module. Inspect wiring for damage, connector pins for issues. Fix as needed.

Wrap Up

If your Jeep is displaying OBD code u120c and experiencing issues with the fuel level sensor, it could be caused by a faulty fuel level sensor, damaged wiring harness, or poor electrical connection.

This code typically indicates a problem with the fuel level sensor circuit.

To address Jeep OBD code u120c, start by inspecting the fuel level sensor and its wiring for any visible damage.

Test the sensor’s resistance and check for proper voltage supply.

Ensure connectors are securely attached and free of corrosion.

Replace the fuel level sensor if necessary to resolve the issue.