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Engine-Codes – Generic – B1602

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

Quick Answer

The B1602 code indicates that the Passive Anti-Theft System (PATS) in the vehicle has received an invalid format of key-code from the ignition key transponder. Common causes include Faulty ignition key transponder, Wiring issues in the PATS system, Defective 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
B1602 indicates PATS Received Invalid Format Of Key-Code From Ignition Key Transponder.
Common causes
Common causes include Faulty ignition key transponder, Wiring issues in the PATS system, Defective 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 Aug 19, 2024
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Code B1602 Description

The B1602 code indicates that the Passive Anti-Theft System (PATS) in the vehicle has received an invalid format of key-code from the ignition key transponder. This system is designed to prevent unauthorized starting of the vehicle by requiring a specific key with a programmed code to be used. When the system detects an invalid key-code format, it can lead to the vehicle not starting or running erratically.

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

Common Causes of B1602

  1. Faulty ignition key transponder
  2. Wiring issues in the PATS system
  3. Defective PATS module
  4. Incorrectly programmed keys
  5. Interference from other electronic devices near the key transponder

Symptoms of B1602

  1. Engine not starting
  2. Engine stalling
  3. Loss of power while driving
  4. Illumination of the security light on the dashboard
  5. Inability to shift gears in an automatic transmission vehicle

How to Fix B1602

  1. Check and replace the ignition key transponder if faulty
  2. Inspect and repair any damaged wiring in the PATS system
  3. Replace the PATS module if found to be defective
  4. Reprogram the keys to ensure they are correctly programmed
  5. Ensure there is no electronic interference near the key transponder

Cost to Fix B1602

The cost of repairing a B1602 code can vary depending on the specific cause of the issue. Generally, the cost of replacing an ignition key transponder can range from $50 to $200, while repairing wiring or replacing the PATS module can cost between $100 to $500. In total, the repair for this issue may range from $150 to $700, including parts and labor. It's important to consider additional costs for diagnosis and any other related repairs that may be needed.

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Code B1602 Information for Specific Makes

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 Code

1. What are the common symptoms of OBDII code B1602?

- Common symptoms include the vehicle not starting, the engine stalling, or the key being unable to turn in the ignition.

2. What does OBDII code B1602 indicate?

- OBDII code B1602 indicates that the Passive Anti-Theft System (PATS) received an invalid format of the key-code from the ignition key transponder.

3. What are the possible causes of OBDII code B1602?

- Possible causes of B1602 include a faulty transponder key, issues with the transceiver module, or a problem with the PATS system itself.

4. How can I diagnose the OBDII code B1602?

- Diagnosing B1602 involves checking the transponder key for damage, ensuring it is programmed correctly, and using a diagnostic tool to scan the PATS system for faults.

5. Can I repair OBDII code B1602 myself?

- Depending on the specific cause, you may be able to repair B1602 yourself by reprogramming the transponder key, replacing a faulty key, or addressing issues with the transceiver module.

6. Is it safe to continue driving with OBDII code B1602 present?

- It is not recommended to continue driving with B1602 present, as it may lead to further issues with starting the vehicle or potential security concerns related to the PATS system.

7. How much does it typically cost to repair OBDII code B1602?

- The cost of repairing B1602 can vary based on the cause of the issue, but it may range from a relatively inexpensive key reprogramming to a more costly transceiver module replacement.

8. Can a locksmith help with resolving OBDII code B1602?

- Yes, a locksmith with experience in automotive key programming may be able to assist with resolving issues related to B1602 by reprogramming keys or diagnosing transponder problems.

9. Are there any preventive measures to avoid OBDII code B1602 in the future?

- To prevent B1602, it is advisable to keep transponder keys in good condition, avoid exposing them to extreme conditions, and have them regularly checked and reprogrammed if needed.

10. How long does it typically take to repair OBDII code B1602?

- The repair time for B1602 can vary depending on the specific cause and the availability of parts or programming tools, but it may range from a quick key reprogramming to a more involved module replacement taking a few hours.

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