AutoCodes – Mercury – B1205 Mercury

B1205 Mercury Code - EIC Switch Assembly Circuit Failure

Quick Answer

The message center functionality is controlled through the message center switches, which are hardwired to the Instrument Cluster (IC). Common causes include Faulty Message Center Switch, Message Center Switch harness is open or shorted, Message Center Switch circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B1205 Mercury indicates EIC Switch Assembly Circuit Failure.
Common causes: Common causes include Faulty Message Center Switch, Message Center Switch harness is open or shorted, Message Center Switch circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

Save to My Repairs My Repairs

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

Code Popularity 687

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 19, 2024

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 B1205 Mercury Description

The message center functionality is controlled through the message center switches, which are hardwired to the Instrument Cluster (IC). The Instrument Cluster (IC) monitors the message center switch input by sending reference signals through the circuit. The message center switch return signal is routed back to the Instrument Cluster (IC) through the circuit. A continuous or on-demand Diagnostic Trouble Code (DTC) that sets if the Instrument Cluster (IC) detects a stuck RESET or SETUP switch, or a switch that has been pressed for longer than 2 minutes, on the circuit.

OBDII Code B1205 Mercury - EIC Switch Assembly Circuit Failure - AutoCodes.com — B1205 Mercury Code - EIC Switch Assembly Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B1205 Mercury?

Faulty Message Center Switch
Message Center Switch harness is open or shorted
Message Center Switch circuit poor electrical connection
Faulty Instrument Cluster (IC)

How to Fix the DTC B1205 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 B1205 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 B1205 Mercury code?

Need more information on how to fix the B1205 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1205 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 B1205 Mercury Code

1. What are the common symptoms of OBDII code B1205 Mercury (EIC Switch Assembly Circuit Failure)?

- Common symptoms include the illuminated check engine light, issues with the electronic instrument cluster, and possible loss of communication with the EIC module.

2. What causes the OBDII code B1205 Mercury (EIC Switch Assembly Circuit Failure)?

- The code is typically caused by a malfunction in the EIC switch assembly circuit, which can be due to wiring issues, a faulty switch, or a damaged EIC module.

3. How can I diagnose the EIC switch assembly circuit failure related to code B1205 in my Mercury?

- Diagnosing this issue requires a scan tool to retrieve the trouble code, followed by inspecting the wiring, connectors, and components related to the EIC switch assembly for any visible damage or issues.

4. Can I drive my Mercury with the B1205 trouble code?

- It is generally safe to drive your vehicle with the B1205 code, but it is recommended to address the issue promptly to prevent any potential electrical problems or further damage.

5. How can I repair the EIC switch assembly circuit failure causing OBDII code B1205 in my Mercury?

- Repair options may include repairing or replacing damaged wiring, fixing faulty switches, or replacing the EIC module if necessary. It is recommended to consult a professional mechanic for an accurate diagnosis and repair.

6. Will disconnecting the battery reset the B1205 trouble code in my Mercury?

- Disconnecting the battery may clear the code temporarily, but it is not a permanent solution. The underlying issue causing the B1205 code must be diagnosed and repaired to prevent it from reoccurring.

7. Are there any DIY tips for troubleshooting the EIC switch assembly circuit failure related to code B1205?

- DIY tips may include checking for loose connections, inspecting the switch assembly for physical damage, and ensuring proper grounding of the EIC module. However, it is recommended to seek professional help for a thorough diagnosis.

8. How much does it cost to fix the EIC switch assembly circuit failure in a Mercury triggering the B1205 OBDII code?

- Repair costs can vary depending on the exact cause of the issue, labor rates, and parts needed. It is advisable to obtain quotes from different mechanics or repair shops to compare prices.

9. Can a faulty EIC switch assembly affect other vehicle systems in addition to triggering the B1205 trouble code?

- Yes, a malfunctioning EIC switch assembly can potentially affect other electronic systems in your Mercury, leading to issues with the instrument cluster, lights, and other electrical components.

10. Is the EIC switch assembly circuit failure a common problem in Mercury vehicles?

- While not extremely common, issues related to the EIC switch assembly circuit failure and the B1205 trouble code can occur in certain Mercury models, requiring proper diagnosis and repair.