AutoCodes – Mercury – B1681 Mercury

B1681 Mercury Code - PATS Transceiver Module Signal Is Not Received

Quick Answer

During each vehicle start sequence, the transceiver module reads the Passive Anti-Theft System (PATS) key identification code and sends the data to the Powertrain Control Module (PCM). Common causes include Faulty Passive Anti-Theft System (PATS) transceiver, Faulty Powertrain Control Module (PCM), Faulty Passive Anti-Theft System (PATS) key. 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: B1681 Mercury indicates PATS Transceiver Module Signal Is Not Received.
Common causes: Common causes include Faulty Passive Anti-Theft System (PATS) transceiver, Faulty Powertrain Control Module (PCM), Faulty Passive Anti-Theft System (PATS) key.
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 3,609

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jun 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1681 Mercury Description

During each vehicle start sequence, the transceiver module reads the Passive Anti-Theft System (PATS) key identification code and sends the data to the Powertrain Control Module (PCM).

OBDII Code B1681 Mercury - PATS Transceiver Module Signal Is Not Received - AutoCodes.com — B1681 Mercury Code - PATS Transceiver Module Signal Is Not Received

What does this mean?

What are the Possible Causes of the DTC B1681 Mercury?

Faulty Passive Anti-Theft System (PATS) transceiver
Faulty Powertrain Control Module (PCM)
Faulty Passive Anti-Theft System (PATS) key

How to Fix the DTC B1681 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 B1681 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 B1681 Mercury Code

1. What are the common symptoms of OBDII code B1681 Mercury (PATS Transceiver Module Signal Is Not Received)?

The common symptoms include difficulty starting the vehicle, the engine not turning over, and the security light flashing on the dashboard.

2. What are the possible causes of OBDII code B1681 Mercury?

Possible causes include a faulty transceiver module, damaged wiring or connectors, a dead key fob battery, or issues with the vehicle's security system.

3. How can I diagnose the OBDII code B1681 Mercury?

Diagnosing this code typically involves using a diagnostic scanner to retrieve the code, checking the transceiver module and related components for damage, and testing the key fob for functionality.

4. Can I still drive my vehicle with OBDII code B1681 Mercury?

It is not recommended to drive the vehicle with this code present, as it may result in starting issues or potential security system malfunctions.

5. How can I repair OBDII code B1681 Mercury?

Repairing this code may involve replacing the transceiver module, repairing any damaged wiring or connectors, replacing the key fob battery, or resetting the vehicle's security system.

6. Are there any DIY tips for troubleshooting OBDII code B1681 Mercury?

DIY tips include checking the key fob battery, inspecting wiring and connectors for damage, and ensuring the transceiver module is securely connected.

7. Will resetting the vehicle's computer clear OBDII code B1681 Mercury?

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

8. Can a locksmith or dealership help with OBDII code B1681 Mercury?

Yes, a locksmith or dealership with the necessary equipment and expertise can help diagnose and repair issues related to this code.

9. How much does it typically cost to repair OBDII code B1681 Mercury?

The cost of repairs can vary depending on the specific issue causing the code, but it may range from a simple key fob battery replacement to a more involved transceiver module replacement.

10. Can OBDII code B1681 Mercury be a recurring issue?

If the root cause of the code is not properly addressed, it is possible for OBDII code B1681 Mercury to be a recurring issue. Regular maintenance and timely repairs are recommended to prevent this.