AutoCodes – Mercury – U0230 Mercury

U0230 Mercury Code - Lost Communication With Rear Gate Module

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Rear Gate Module, Rear Gate Module harness is open or shorted, Rear Gate Module 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: U0230 Mercury indicates Lost Communication With Rear Gate Module.
Common causes: Common causes include Faulty Rear Gate Module, Rear Gate Module harness is open or shorted, Rear Gate Module 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 467

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 Apr 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U0230 Mercury Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in idle mode, both lines carry 2.5V. When data bits are being transmitted, the CAN high line goes to 3.75V, and the CAN low drops to 1.25V, thereby generating 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 Rear Gate Module has not been received.

OBDII Code U0230 Mercury - Lost Communication With Rear Gate Module - AutoCodes.com — U0230 Mercury Code - Lost Communication With Rear Gate Module

What does this mean?

What are the Possible Causes of the DTC U0230 Mercury?

Faulty Rear Gate Module
Rear Gate Module harness is open or shorted
Rear Gate Module circuit poor electrical connection

How to Fix the DTC U0230 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 U0230 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.

Need more information about the U0230 Mercury code?

Need more information on how to fix the U0230 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0230 Mercury code diagnosed by a professional: Find a repair shop in your area

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 U0230 Mercury Code

1. What are the common symptoms of OBDII code U0230 in a Mercury related to "Lost Communication With Rear Gate Module"?

- Common symptoms include a malfunctioning power liftgate, inability to control rear gate functions electronically, and warning lights on the dashboard.

2. What can cause the OBDII code U0230 in a Mercury indicating a communication issue with the rear gate module?

- Possible causes include damaged wiring or connectors, a faulty rear gate module, software issues, or a problem with the vehicle's network communication system.

3. How can I diagnose the cause of the U0230 trouble code in my Mercury?

- Diagnosis typically involves checking the rear gate module's connections, inspecting the wiring for any visible damage, and using a diagnostic scan tool to communicate with the module.

4. Is it safe to continue driving my Mercury with the U0230 trouble code present?

- It is generally safe to drive the vehicle with this code, but it is important to address the underlying issue promptly to avoid potential inconvenience or safety concerns related to rear gate operation.

5. Can I repair the U0230 code in my Mercury by resetting the system or clearing the fault code?

- Simply clearing the fault code may temporarily eliminate warning lights, but it will not fix the underlying communication issue causing the code. Proper diagnostic and repair steps are necessary.

6. Are there any DIY repair tips for resolving the U0230 trouble code in a Mercury?

- DIY enthusiasts can start by checking the rear gate module's connections and inspecting the wiring for any issues. However, more complex repairs may require professional assistance.

7. How much does it typically cost to repair the U0230 code related to the rear gate module in a Mercury?

- Repair costs can vary depending on the specific cause of the code, but they may range from a simple wiring repair to a replacement of the rear gate module. It is advisable to obtain quotes from trusted mechanics.

8. Can extreme weather conditions affect the rear gate module communication and trigger the U0230 code in a Mercury?

- Yes, extreme weather conditions such as heavy rain or extreme temperatures can potentially damage the wiring or connectors of the rear gate module, leading to communication issues.

9. Will replacing the rear gate module in my Mercury automatically resolve the U0230 code?

- While replacing the rear gate module may address the communication issue, it is crucial to ensure that the root cause of the problem is correctly diagnosed and fixed to prevent future occurrences of the trouble code.

10. Is the U0230 trouble code common in Mercury vehicles, or is it specific to certain models?

- The U0230 code related to lost communication with the rear gate module is specific to certain Mercury models equipped with this feature. It may not be a common issue across all Mercury vehicles.