AutoCodes – Mercury – B1601 Mercury

B1601 Mercury Code - PATS Received Incorrect Key-Code From Ignition Key Transponder

Quick Answer

During each vehicle start sequence, the transceiver reads the Passive Anti-Theft System (PATS) key identification code and circuit send the data to the Powertrain Control Module (PCM). Common causes include Faulty Passive Anti-Theft System (PATS) key, Faulty Powertrain Control Module (PCM). 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: B1601 Mercury indicates PATS Received Incorrect Key-Code From Ignition Key Transponder.
Common causes: Common causes include Faulty Passive Anti-Theft System (PATS) key, Faulty Powertrain Control Module (PCM).
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.

Save to My Repairs My Repairs

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

Code Popularity 1,824

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 May 02, 2019

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 B1601 Mercury Description

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

OBDII Code B1601 Mercury - PATS Received Incorrect Key-Code From Ignition Key Transponder - AutoCodes.com — B1601 Mercury Code - PATS Received Incorrect Key-Code From Ignition Key Transponder

What does this mean?

What are the Possible Causes of the DTC B1601 Mercury?

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

How to Fix the DTC B1601 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 B1601 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 B1601 Mercury code?

Need more information on how to fix the B1601 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1601 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 B1601 Mercury Code

1. What are the common symptoms of OBDII code B1601 on a Mercury related to PATS Received Incorrect Key-Code?

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

2. What does the OBDII code B1601 Mercury indicate?

This code indicates that the Passive Anti-Theft System (PATS) received an incorrect key-code from the ignition key transponder.

3. What are the possible causes of OBDII code B1601 on a Mercury?

Possible causes include a faulty ignition key transponder, a problem with the PATS module, issues with the wiring or connections, or a malfunction in the engine control module (ECM).

4. How can I diagnose the cause of OBDII code B1601 on my Mercury?

Diagnosing this code typically involves using a diagnostic scanner to retrieve the specific fault codes, checking the ignition key for damage, inspecting the wiring and connections related to the transponder and PATS system, and testing the components involved.

5. Can I still drive my Mercury with OBDII code B1601 present?

It is not recommended to drive the vehicle with this code present, as it may lead to starting issues and potential immobilization of the vehicle.

6. How can I repair OBDII code B1601 on my Mercury?

Repairing this code may involve reprogramming the ignition key transponder, replacing a faulty transponder, repairing any damaged wiring or connections, or resetting the PATS system.

7. Can I reset the OBDII code B1601 on my Mercury by disconnecting the battery?

While disconnecting the battery may reset some codes, it is not guaranteed to clear the B1601 code related to PATS Received Incorrect Key-Code. It is recommended to diagnose and address the root cause of the issue.

8. Will replacing the ignition key resolve OBDII code B1601 on my Mercury?

Replacing the ignition key may resolve the issue if the key transponder is faulty. However, it is important to diagnose the problem accurately before replacing any components.

9. How much does it typically cost to repair OBDII code B1601 on a Mercury?

The cost of repairing this code can vary depending on the cause of the issue. It may range from a simple key reprogramming to more complex repairs involving module replacements.

10. Is OBDII code B1601 specific to Mercury vehicles only?

While the B1601 code is commonly associated with Mercury vehicles, it may also apply to other Ford Motor Company vehicles equipped with the PATS system and similar transponder technology.