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

Quick Answer

The B1601 diagnostic trouble code for Ford vehicles indicates that the Passive Anti-Theft System (PATS) has received an incorrect key code from the ignition key transponder. Common causes include Faulty key transponder, Malfunctioning PATS module, Wiring or connection issues between key transponder and PATS module. 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 Ford indicates PATS Received Incorrect Key-Code From Ignition Key Transponder.
Common causes
Common causes include Faulty key transponder, Malfunctioning PATS module, Wiring or connection issues between key transponder and PATS module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code B1601 Ford Description

The B1601 diagnostic trouble code for Ford vehicles indicates that the Passive Anti-Theft System (PATS) has received an incorrect key code from the ignition key transponder. PATS is a security feature that prevents the engine from starting without the correct key. When the key is inserted into the ignition, the transponder sends a signal to the PATS module to verify the key's authenticity. If the key code received by the PATS module does not match the expected code, the system will prevent the engine from starting.

OBDII Code B1601 Ford - PATS Received Incorrect Key-Code From Ignition Key Transponder
B1601 Ford Code - PATS Received Incorrect Key-Code From Ignition Key Transponder

Common Causes of B1601 Ford

  1. Faulty key transponder.
  2. Malfunctioning PATS module.
  3. Wiring or connection issues between key transponder and PATS module.
  4. Low battery in the key transponder.
  5. Interference from other electronic devices affecting the communication between key transponder and PATS module.

Symptoms of B1601 Ford

  1. Engine cranks but does not start.
  2. Engine starts but immediately shuts off.
  3. PATS warning light illuminated on the dashboard.
  4. Vehicle immobilized and unable to start.

How to Fix B1601 Ford

  1. Check the key transponder battery and replace if necessary.
  2. Inspect wiring and connections between key transponder and PATS module for any damage or loose connections.
  3. Perform a PATS relearn procedure to reprogram the key to the vehicle.
  4. If the issue persists, replace the key transponder or PATS module as needed.
  5. Clear the trouble code from the vehicle's computer system to reset the PATS system.

Cost to Fix B1601 Ford

The cost of repairing a B1601 code can vary depending on the exact cause of the issue and the specific repairs needed. In general, replacing a key transponder battery may cost around $10-$20, while more extensive repairs such as replacing the key transponder or PATS module could range from $100-$500 or more. Labor costs can also vary, with rates typically ranging from $80 to $150 per hour. It's recommended to consult with a qualified mechanic or dealership for a more accurate estimate based on the specific vehicle and location.

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Information for Specific Ford Models

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 Ford Code

1. What are common symptoms of OBDII code B1601 Ford (PATS Received Incorrect Key-Code From Ignition Key Transponder)?

Common symptoms include the vehicle not starting, the engine cranking but not turning over, and the security light on the dashboard flashing rapidly.

2. What could cause the OBDII code B1601 Ford to trigger?

The code B1601 is typically triggered when the Passive Anti-Theft System (PATS) module receives an incorrect key-code signal from the ignition key transponder.

3. How can I diagnose the OBDII code B1601 Ford issue?

Diagnosing this issue usually involves checking the key transponder, ensuring it is programmed correctly, and verifying that the key is recognized by the PATS module.

4. What repairs are recommended for OBDII code B1601 Ford?

Repair recommendations may include reprogramming the key transponder, replacing the ignition key, or reinitializing the PATS system to synchronize the key with the vehicle.

5. Is it possible to fix the OBDII code B1601 Ford issue without professional help?

While some basic troubleshooting steps can be taken, resolving the B1601 code often requires specialized tools and knowledge, so seeking professional help is recommended.

6. Can a faulty key fob or keyless entry remote cause the B1601 code to appear?

Yes, a faulty key fob or keyless entry remote can sometimes trigger the B1601 code if it is not sending the correct key-code signal to the PATS module.

7. Are there any temporary solutions to bypass the OBDII code B1601 Ford issue?

Bypassing the PATS system is not recommended as it compromises the vehicle's security. It is best to address the root cause of the B1601 code to ensure proper functionality and security.

8. How long does it typically take to repair the OBDII code B1601 Ford problem?

The repair time can vary depending on the exact cause of the issue. Simple fixes like reprogramming the key may take less time compared to replacing the PATS module.

9. Will resetting the vehicle's computer system clear the OBDII code B1601 Ford?

Resetting the computer system may temporarily clear the code, but if the underlying issue with the key transponder or PATS module is not addressed, the code is likely to return.

10. Can the OBDII code B1601 Ford affect other vehicle systems or components?

While the B1601 code specifically relates to the PATS system, unresolved issues with the key transponder can potentially lead to starting or security-related problems in the vehicle.

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