AutoCodes – Mercury – U0235 Mercury

U0235 Mercury Code - Lost Communication with Cruise Control Front Distance Range Sensor

Quick Answer

The Controller Area Network (CAN) is a standard bus system in vehicles that enables the connection of automotive devices without the need for a host computer. Common causes include Faulty Front Distance Range Sensor, Front Distance Range Sensor harness is open or shorted, Front Distance Range 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: U0235 Mercury indicates Lost Communication with Cruise Control Front Distance Range Sensor.
Common causes: Common causes include Faulty Front Distance Range Sensor, Front Distance Range Sensor harness is open or shorted, Front Distance Range 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 534

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 Mar 27, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0235 Mercury Description

The Controller Area Network (CAN) is a standard bus system in vehicles that enables the connection of automotive devices without the need for a host computer. The exchange of operating information and commands among devices is facilitated by pre-programmed information about the required message exchange on the serial data circuits. Communication is carried out using two dedicated wires, known as CAN high and CAN low, with both lines carrying 2.5V when the CAN bus is in idle mode. During the transmission of data bits, the CAN high line increases to 3.75V while the CAN low drops to 1.25V, creating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Cruise Control Front Distance Range Sensor has not been received.

OBDII Code U0235 Mercury - Lost Communication with Cruise Control Front Distance Range Sensor - AutoCodes.com — U0235 Mercury Code - Lost Communication with Cruise Control Front Distance Range Sensor

What does this mean?

What are the Possible Causes of the DTC U0235 Mercury?

Faulty Front Distance Range Sensor
Front Distance Range Sensor harness is open or shorted
Front Distance Range Sensor circuit poor electrical connection

How to Fix the DTC U0235 Mercury?

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 U0235 Mercury 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.

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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 U0235 Mercury Code

1. What are the common symptoms of OBDII code U0235 in a Mercury related to the Cruise Control Front Distance Range Sensor?

- Common symptoms include the cruise control not working, the distance range sensor malfunctioning, and the vehicle's cruise control light illuminating on the dashboard.

2. What are the potential causes of the U0235 code in a Mercury vehicle?

- The U0235 code is typically caused by issues with the front distance range sensor, wiring problems, a faulty cruise control module, or a communication error within the vehicle's network.

3. How can I diagnose the U0235 code in my Mercury related to the Cruise Control Front Distance Range Sensor?

- Diagnosis involves using a professional OBDII scanner to read the code, checking the wiring and connections to the distance range sensor, and testing the cruise control system components for faults.

4. Is it safe to continue driving my Mercury with the U0235 code triggered?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to restore proper cruise control functionality and ensure optimal vehicle performance.

5. What are some DIY repair tips for fixing the U0235 code in a Mercury?

- DIY repair tips include checking and cleaning the sensor connections, inspecting the wiring for any damage, and resetting the vehicle's computer system to see if the code reappears.

6. Can the U0235 code in a Mercury be fixed without professional help?

- Depending on your experience and tools available, some simple fixes like checking connections and clearing the code can be done without professional help. However, complex issues may require a mechanic's expertise.

7. How much does it typically cost to repair the U0235 code in a Mercury at a mechanic or dealership?

- Repair costs for the U0235 code can vary based on the exact cause of the issue, but you can expect to pay anywhere from $100 to $500 for parts and labor at a mechanic or dealership.

8. Are there any recalls or technical service bulletins related to the U0235 code in Mercury vehicles?

- It's recommended to check with your local Mercury dealership or visit the NHTSA website to see if there are any recalls or technical service bulletins related to the U0235 code in your specific vehicle model.

9. How long does it typically take to repair the U0235 code in a Mercury?

- The repair time for the U0235 code can vary depending on the exact cause of the issue and the availability of parts. In general, it can take anywhere from one to three hours to diagnose and fix the problem.

10. Will resetting the OBDII code U0235 in my Mercury resolve the issue temporarily?

- Resetting the code may temporarily turn off the warning light, but if the underlying issue causing the U0235 code is not addressed, the problem will likely reoccur. It's important to diagnose and repair the root cause of the code.