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B1602 Ford Code - PATS Received Invalid Format Of Key-Code From Ignition Key Transponder

Quick Answer

The B1602 Ford code indicates that the Passive Anti-Theft System (PATS) has received an invalid format of key-code from the ignition key transponder. Common causes include Faulty transponder key, Malfunctioning ignition key transponder, Wiring issues in the PATS system. 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
B1602 Ford indicates PATS Received Invalid Format Of Key-Code From Ignition Key Transponder.
Common causes
Common causes include Faulty transponder key, Malfunctioning ignition key transponder, Wiring issues in the PATS system.
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 08, 2024
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Code B1602 Ford Description

The B1602 Ford code indicates that the Passive Anti-Theft System (PATS) has received an invalid format of key-code from the ignition key transponder. The PATS system is designed to prevent unauthorized starting of the vehicle by using a transponder key with a unique code that must match the code stored in the vehicle's computer. When the key-code format is invalid or not recognized by the system, it can lead to issues with starting the vehicle or even immobilize it completely.

OBDII Code B1602 Ford - PATS Received Invalid Format Of Key-Code From Ignition Key Transponder
B1602 Ford Code - PATS Received Invalid Format Of Key-Code From Ignition Key Transponder

Common Causes of B1602 Ford

  1. Faulty transponder key
  2. Malfunctioning ignition key transponder
  3. Wiring issues in the PATS system
  4. Faulty PATS control module
  5. Software glitch in the vehicle's computer system

Symptoms of B1602 Ford

  1. Inability to start the vehicle
  2. Engine immobilization
  3. PATS warning light illuminated on the dashboard
  4. Key not recognized message displayed on the instrument cluster

How to Fix B1602 Ford

  1. Verify the key-code format: The first step in resolving this issue is to verify that the key-code format being transmitted by the transponder key is correct. This may involve using a diagnostic tool to read the key-code data.
  2. Inspect the transponder key: Check the transponder key for any visible damage or signs of wear. If the key is damaged, it may need to be replaced.
  3. Check the ignition key transponder: Inspect the ignition key transponder for any faults or malfunctions. This component is essential for transmitting the key-code to the PATS system.
  4. Test the PATS system: Use a diagnostic tool to test the PATS system and identify any potential faults or errors. This will help pinpoint the exact cause of the issue.
  5. Replace faulty components: If a faulty transponder key, ignition key transponder, or PATS control module is identified, it may need to be replaced to resolve the issue.

Cost to Fix B1602 Ford

The typical repair costs for addressing the B1602 Ford code can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacing a transponder key or ignition key transponder can cost anywhere from $50 to $200, including parts and labor. If the issue is more complex and involves replacing the PATS control module or addressing wiring issues, the repair costs can range from $200 to $500 or more.

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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 B1602 Ford Code

1. What are the common symptoms of OBDII code B1602 on a Ford vehicle?

- Common symptoms include the engine not starting, the vehicle going into anti-theft mode, and the key symbol flashing on the dashboard.

2. What does the OBDII code B1602 Ford indicate?

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

3. What are the possible causes of OBDII code B1602 on a Ford vehicle?

- Possible causes include a faulty transponder key, issues with the transceiver antenna, a problem with the PATS module, or a communication error between the key and the PATS system.

4. How can I troubleshoot and repair OBDII code B1602 on my Ford vehicle?

- Start by checking the transponder key for damage or malfunction. Ensure that the key is programmed correctly and has a working battery. If the key is fine, inspect the transceiver antenna and PATS module for any faults.

5. Can I reset OBDII code B1602 on my Ford vehicle by disconnecting the battery?

- Disconnecting the battery may reset the code temporarily, but it is not a recommended long-term solution. It's best to diagnose the root cause of the issue and address it properly.

6. Is it safe to drive my Ford vehicle with OBDII code B1602 present?

- It is not recommended to drive the vehicle with this code present, as it may lead to starting issues or the vehicle going into anti-theft mode unexpectedly.

7. How can I prevent OBDII code B1602 from occurring in the future?

- To prevent this code, make sure to use a properly programmed transponder key, keep the key in good condition, and address any PATS system issues promptly.

8. Can a locksmith or dealership help with diagnosing and repairing OBDII code B1602?

- Yes, a locksmith or dealership with experience in automotive security systems can assist in diagnosing and repairing issues related to OBDII code B1602.

9. Will clearing the OBDII code B1602 resolve the underlying issue?

- Clearing the code without addressing the root cause will not resolve the issue. It's important to diagnose and fix the problem to prevent the code from reoccurring.

10. How much does it typically cost to repair OBDII code B1602 on a Ford vehicle?

- The cost of repairing this code can vary depending on the specific issue, but it may involve key reprogramming, transceiver antenna replacement, or PATS module repair, which can range from a few hundred to over a thousand dollars.

Discuss the causes and fixes for B1602 Ford OBDII Code

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  • I have a 2002 Ford Explorer sport trac that the key lock cylinder broke on. We replaced cylinder and keys. Have been trying to match new cylinder and keys with thinkdiag scanner. Not having any luck!

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