AutoCodes – Mercury – U0258 Mercury

U0258 Mercury Code - Lost Communication With Radio Transceiver

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 Radio Transceiver, Radio Transceiver harness is open or shorted, Radio Transceiver 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: U0258 Mercury indicates Lost Communication With Radio Transceiver.
Common causes: Common causes include Faulty Radio Transceiver, Radio Transceiver harness is open or shorted, Radio Transceiver 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 433

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 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0258 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 Radio Transceiver has not been received.

OBDII Code U0258 Mercury - Lost Communication With Radio Transceiver - AutoCodes.com — U0258 Mercury Code - Lost Communication With Radio Transceiver

What does this mean?

What are the Possible Causes of the DTC U0258 Mercury?

Faulty Radio Transceiver
Radio Transceiver harness is open or shorted
Radio Transceiver circuit poor electrical connection

How to Fix the DTC U0258 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 U0258 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 U0258 Mercury Code

1. What are common symptoms of OBDII code U0258 "Lost Communication With Radio Transceiver" in a Mercury vehicle?

- Common symptoms include loss of communication with the radio transceiver, malfunctioning entertainment system, and potential issues with other vehicle systems.

2. What can cause the OBDII code U0258 to trigger in a Mercury vehicle?

- The code U0258 can be triggered by a faulty radio transceiver, damaged wiring or connectors related to the radio system, or a communication breakdown between modules.

3. How can I diagnose the source of the "Lost Communication With Radio Transceiver" code in my Mercury?

- Diagnose the issue by checking the connections and wiring related to the radio transceiver, testing the radio transceiver itself, and using a diagnostic scanner to identify communication faults.

4. Is it safe to continue driving my Mercury with the U0258 trouble code present?

- It is generally safe to drive with the U0258 code, but it is recommended to address the issue promptly to prevent potential communication problems with other vehicle modules.

5. Can I repair the U0258 code in my Mercury at home, or do I need professional assistance?

- Depending on your automotive repair skills, you may be able to address the U0258 code at home by checking connections, wiring, and potentially replacing the radio transceiver. However, professional assistance may be needed for complex diagnostics.

6. Will resetting the trouble codes make the U0258 code disappear permanently?

- Resetting the trouble codes may temporarily clear the U0258 code, but if the underlying issue causing the communication loss with the radio transceiver is not resolved, the code is likely to reappear.

7. Are there any specific repair tips for resolving the U0258 code in a Mercury vehicle?

- Ensure all connections related to the radio transceiver are secure, inspect wiring for damage, and consider consulting a wiring diagram to trace communication lines for faults.

8. Can extreme weather conditions affect the likelihood of the U0258 code appearing in a Mercury?

- Extreme weather conditions can potentially affect electrical components, including the radio transceiver, which may increase the likelihood of the U0258 code appearing.

9. How do I prevent the U0258 code from recurring in my Mercury after repairs?

- To prevent the U0258 code from reoccurring, ensure all repairs are done correctly, use high-quality replacement parts, and periodically check the radio system for any signs of malfunction.

10. Will replacing the radio transceiver always resolve the U0258 trouble code in a Mercury vehicle?

- While replacing the radio transceiver is a common solution for the U0258 code, it is essential to diagnose the issue accurately to determine if the transceiver replacement will effectively resolve the communication problem.