AutoCodes – Mercury – U0214 Mercury

U0214 Mercury Code - Lost Communication With Remote Function Actuation 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 Remote Function Actuation Module, Remote Function Actuation Module harness is open or shorted, Remote Function Actuation 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: U0214 Mercury indicates Lost Communication With Remote Function Actuation Module.
Common causes: Common causes include Faulty Remote Function Actuation Module, Remote Function Actuation Module harness is open or shorted, Remote Function Actuation 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.

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Code Popularity 758

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
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Code U0214 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 Remote Function Actuation Module has not been received.

OBDII Code U0214 Mercury - Lost Communication With Remote Function Actuation Module - AutoCodes.com — U0214 Mercury Code - Lost Communication With Remote Function Actuation Module

What does this mean?

What are the Possible Causes of the DTC U0214 Mercury?

Faulty Remote Function Actuation Module
Remote Function Actuation Module harness is open or shorted
Remote Function Actuation Module circuit poor electrical connection

How to Fix the DTC U0214 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 U0214 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 U0214 Mercury Code

1. What are the common symptoms of OBDII code U0214 in a Mercury vehicle?

- Common symptoms include issues with remote keyless entry, non-functional power windows, door locks, or other remote-controlled functions.

2. What can cause the U0214 code indicating lost communication with the Remote Function Actuation Module in a Mercury car?

- Possible causes may include a faulty remote function actuation module, damaged wiring or connectors, a blown fuse, or a software glitch.

3. How can I diagnose the U0214 code in my Mercury to pinpoint the exact issue?

- A thorough diagnostic scan with an OBDII scanner is recommended to retrieve the specific trouble codes and identify the module or circuit causing the communication loss.

4. Is it safe to continue driving my Mercury with the U0214 code present?

- While the vehicle may still be operable, it is advisable to address the issue promptly to prevent potential inconvenience or safety risks associated with malfunctioning remote functions.

5. Can I repair the U0214 code issue in my Mercury at home, or do I need professional assistance?

- Depending on your automotive knowledge and tools, you may attempt simple checks like inspecting fuses and connections. However, for more complex issues, seeking professional help is recommended.

6. Are there any quick tips for troubleshooting the U0214 code related to lost communication with the Remote Function Actuation Module?

- Checking and replacing any blown fuses, ensuring all wiring connections are secure, and resetting the module through a proper procedure are initial steps to troubleshoot the issue.

7. How much can I expect to pay for repairing the U0214 code in a Mercury at a dealership or repair shop?

- Repair costs can vary based on the specific problem and labor rates. It's advisable to obtain quotes from different service providers to compare and make an informed decision.

8. Will resetting the OBDII code U0214 in my Mercury temporarily resolve the issue?

- Resetting the code may clear the warning temporarily, but if the underlying problem causing the communication loss persists, the code is likely to reappear.

9. What are the long-term implications of ignoring the U0214 code in a Mercury vehicle?

- Ignoring the code can lead to continued malfunctions in remote functions and potentially affect other vehicle systems connected to the Remote Function Actuation Module.

10. Can extreme weather conditions or environmental factors contribute to triggering the U0214 code in a Mercury?

- While rare, extreme temperatures or water exposure could potentially cause electrical issues leading to communication loss with the Remote Function Actuation Module.