[SOLVED] Dodge U1120 Code: Fast Fix For Lost Wheel Distance

The OBD code U1120 for Dodge indicates a communication issue between the vehicle’s engine control module (ECM) and the antilock brake system (ABS) module.

Symptoms include the Engine Light being ON.

This code is commonly caused by a faulty ABS module, open/shorted ABS module harness, or poor electrical connection.

It is important to address this issue promptly to ensure proper vehicle operation.

A possible fix involves inspecting the wiring harness and connectors for any damage or corrosion, and checking connector pins for any issues.

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

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Symptoms of the Dodge u1120 OBD Code

The Dodge U1120 fault code indicates a communication issue between the ABS module and the PCM.

Symptoms: Service Electronic Throttle Control warning light may illuminate.
Loss of communication with the Antilock Brake System (ABS) module.
Erratic shifting from the transmission.
Difficulty starting the vehicle.
Rough idle or stalling at low speeds.

Causes of the Dodge u1120 OBD Code

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Possible triggers for Dodge U1120 include communication issues between the ABS module and the PCM.

U1120 can be caused by a faulty AntiLock Brake System (ABS) Module.
An open or shorted AntiLock Brake System (ABS) Module harness.
A poor electrical connection in the AntiLock Brake System (ABS) Module circuit.

Fixing Dodge Error Code u1120 Step By Step

Address the communication issue between the ABS module and the PCM to resolve Dodge U1120.

To fix the Dodge OBDII code U1120, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
Next, check the connections and wiring to the ABS control module.
Inspect for any signs of damage or corrosion.
If no issues are found with the wiring, consider resetting the ABS control module using a scan tool.
Finally, if the problem persists, the ABS control module may need to be replaced with a new one.

Cost Of Fixing Dodge u1120 Fault Code

The repair for Dodge U1120 may involve diagnosing and fixing communication issues within the vehicle.

The cost to diagnose and fix the Dodge OBD code U1120 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 diagnostic and repair process.

Details of the Dodge u1120 OBD Code

Dodge U1120 code indicates a communication issue between the ABS module and the PCM.

Dodge OBD code U1120 means the vehicle’s network communication with the Antilock Brake System (ABS) control module has stopped.

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

The CAN bus is a communication network that allows different modules in the vehicle to communicate with each other.

When the PCM does not receive signals from the ABS module, it sets code U1120.

Mechanic’s Tech Notes

This section provides detailed information on the Dodge U1120 fault code.

To diagnose and fix OBDII code U1120 in a Dodge, start by checking the TCM power and ground using a multimeter.

Verify TCM communication over the CAN network with a scan tool.

Visually inspect the wiring harness and connectors for any damage, focusing on broken, bent, or corroded pins.

Reflashing the TCM may be necessary to resolve the issue.

If the problem persists, consider checking the CAN bus for faults or consulting a professional for further assistance.

FAQ

1. What does OBD code U1120 mean in a Dodge vehicle?

OBD code U1120 in a Dodge indicates a communication issue with the AntiLock Brake System (ABS) Module. Check ABS module, harness, and connections for faults.

2. What are the common symptoms associated with code U1120 in a Dodge?

Common symptoms of U1120 in a Dodge include the Engine Light ON. Causes may be a faulty ABS module or related wiring issues. Inspect and repair as needed.

3. How can I diagnose and fix OBD code U1120 in my Dodge vehicle?

Diagnose and fix OBD code U1120 in a Dodge: Symptoms Engine Light ON; Causes Faulty ABS Module, harness issues; Fix Inspect and repair ABS Module and wiring connections.

Wrap Up

If your Dodge is displaying OBD code u1120 along with ABS and traction control lights, it may indicate a communication issue between the ABS module and the Powertrain Control Module (PCM).

This could be caused by faulty wheel speed sensors, damaged wiring harnesses, or a malfunctioning ABS module.

To address Dodge OBD code u1120, start by inspecting the wiring harness and connectors for any signs of damage or corrosion.

Test the wheel speed sensors for proper operation and check for any loose or disconnected connections.

If no issues are found, the ABS module may need to be diagnosed and potentially