AutoCodes – Mercury – B1218 Mercury

B1218 Mercury Code - Transmitter Identification Code

Quick Answer

The Remote Keyless Entry (RKE) feature is controlled by the Tire Pressure Monitor (TPM) module and the Body Control Module (BCM). Common causes include Reprogram Integrated Key Transponder (IKT), Faulty Integrated Key Transponder (IKT). 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: B1218 Mercury indicates Transmitter Identification Code.
Common causes: Common causes include Reprogram Integrated Key Transponder (IKT), Faulty Integrated Key Transponder (IKT).
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.

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Code Popularity 933

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

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

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B1218 Mercury Description

The Remote Keyless Entry (RKE) feature is controlled by the Tire Pressure Monitor (TPM) module and the Body Control Module (BCM). When a button is pressed on an Integrated Key Transponder (IKT) the Transmitter Identification Code (TIC) and RKE command is received by the internal TPM module antenna. If the TPM module determines that it is a valid and programmed TIC, it sends the RKE command and TIC to the BCM over the MS-CAN. When the BCM receives the RKE command, it carries out the command by controlling the door locks or activating the horn and turn signals for the panic alarm. The RKE transmitters and the BCM also utilize a rolling code to prevent the code from being captured by a code grabber. The system advances the counter in the RKE transmitter and the BCM every time an RKE transmitter button is pressed. A Diagnostic Trouble Code (DTC) that sets when the BCM detects an invalid TIC from an IKT.

OBDII Code B1218 Mercury - Transmitter Identification Code - AutoCodes.com — B1218 Mercury Code - Transmitter Identification Code

What does this mean?

What are the Possible Causes of the DTC B1218 Mercury?

Reprogram Integrated Key Transponder (IKT)
Faulty Integrated Key Transponder (IKT)

How to Fix the DTC B1218 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 does this mean?

Code Tech Notes

B1218:44 Transmitter Identification Code Data Memory Failure
B1218:51 Transmitter Identification Code Not Programmed
B1218:81 Transmitter Identification Code Invalid Serial Data Receive

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1218 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 B1218 Mercury Code

1. What is OBDII code B1218 for Mercury vehicles?

The B1218 code indicates a fault with the Transmitter Identification Code in a Mercury vehicle's system.

2. What are the common symptoms of OBDII code B1218 in a Mercury car?

Common symptoms of code B1218 may include issues with remote keyless entry, difficulty starting the vehicle, and a flashing anti-theft light on the dashboard.

3. What are the possible causes of OBDII code B1218 in a Mercury vehicle?

Possible causes of code B1218 include a malfunctioning key fob, a faulty receiver module, wiring issues, or a problem with the vehicle's security system.

4. How can I diagnose OBDII code B1218 in my Mercury car?

Diagnosing code B1218 may require using a professional OBDII scanner to read the code and investigate the Transmitter Identification Code system for any faults or malfunctions.

5. Can I still drive my Mercury vehicle with OBDII code B1218 present?

It is generally safe to drive with code B1218, but it is recommended to address the issue promptly to avoid potential security or starting problems.

6. How can I repair OBDII code B1218 in my Mercury car?

Repairing code B1218 may involve reprogramming the key fobs, replacing the receiver module, checking and repairing any wiring issues, or resetting the vehicle's security system.

7. Will resetting the OBDII code B1218 in my Mercury car make it go away permanently?

Resetting the code may clear it temporarily, but if the underlying issue is not fixed, the code is likely to reappear.

8. Can a DIY enthusiast fix OBDII code B1218 in a Mercury vehicle?

Depending on the specific cause of the code, some DIY enthusiasts with the necessary tools and knowledge may be able to address the issue themselves.

9. Is OBDII code B1218 specific to certain Mercury models or years?

Code B1218 related to the Transmitter Identification Code can occur in various Mercury models and years equipped with keyless entry systems.

10. Does fixing OBDII code B1218 require a visit to a dealership or auto repair shop?

While some repairs for code B1218 can be done at home, complex issues may require professional diagnosis and repair at a dealership or auto repair shop specialized in Mercury vehicles.