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Engine-Codes – Generic – B1600

B1600 Code - PATS Ignition Key Transponder Signal Is Not Received

Quick Answer

The B1600 diagnostic trouble code (DTC) indicates that the Passive Anti-Theft System (PATS) in the vehicle is unable to receive the transponder signal from the ignition key. Common causes include Faulty transponder key, Transponder key battery is dead, 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
B1600 indicates PATS Ignition Key Transponder Signal Is Not Received.
Common causes
Common causes include Faulty transponder key, Transponder key battery is dead, 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 07, 2024
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Code B1600 Description

The B1600 diagnostic trouble code (DTC) indicates that the Passive Anti-Theft System (PATS) in the vehicle is unable to receive the transponder signal from the ignition key. The PATS system is designed to prevent unauthorized starting of the vehicle by requiring a specific transponder key to be present and recognized by the system. When the PATS system fails to receive the signal from the transponder key, the engine may be disabled, preventing the vehicle from starting.

OBDII Code B1600 - PATS Ignition Key Transponder Signal Is Not Received
B1600 Code - PATS Ignition Key Transponder Signal Is Not Received

Common Causes of B1600

  1. Faulty transponder key.
  2. Transponder key battery is dead.
  3. Wiring issues in the PATS system.
  4. Faulty PATS module.
  5. Issues with the transceiver antenna.

Symptoms of B1600

  1. Engine cranks but does not start.
  2. Immobilizer light or security light on the dashboard remains illuminated.
  3. Vehicle starts but immediately shuts off.
  4. Key symbol or PATS warning message displayed on the instrument cluster.

How to Fix B1600

  1. Check the transponder key battery and replace if necessary.
  2. Inspect the wiring in the PATS system for any damage or corrosion and repair as needed.
  3. Verify communication between the transponder key and PATS module using a diagnostic tool.
  4. Replace the transponder key if it is faulty.
  5. Replace the PATS module if it is determined to be the cause of the issue.

Cost to Fix B1600

The cost of repairing a B1600 code can vary depending on the specific cause of the issue. In general, replacing a transponder key can cost between $50 to $200, including programming. If the issue is related to wiring or the PATS module, the cost can range from $100 to $500 or more, depending on the extent of the repair needed. It is advisable to consult with a professional mechanic to get an accurate estimate based on the specific diagnosis and repair required.

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Code B1600 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 B1600 Code

1. What are the common symptoms of OBDII code B1600 (PATS Ignition Key Transponder Signal Is Not Received)?

- The common symptoms include difficulty starting the vehicle, the engine cranking but not starting, or the vehicle going into anti-theft mode.

2. What are the possible causes of OBDII code B1600?

- The code B1600 can be triggered by issues with the transponder key, faulty transceiver, damaged wiring, or a malfunction in the PATS (Passive Anti-Theft System) module.

3. How can I diagnose the cause of OBDII code B1600?

- Diagnosing the code B1600 involves checking the transponder key, inspecting the wiring for any damage, testing the transceiver, and scanning the PATS module for fault codes.

4. Can a malfunctioning key fob trigger the OBDII code B1600?

- Yes, a malfunctioning key fob or transponder key can trigger the code B1600 if it fails to send the correct signal to the vehicle's PATS system.

5. What are some repair tips for fixing OBDII code B1600?

- Repair tips may include reprogramming the transponder key, replacing a faulty key, repairing damaged wiring, or reprogramming the PATS module to recognize the transponder signal.

6. Is it possible to reset OBDII code B1600 without replacing any components?

- In some cases, resetting the code B1600 can be done by reprogramming the transponder key or performing a relearn procedure to sync the key with the vehicle's PATS system without replacing any components.

7. Can a DIY enthusiast fix OBDII code B1600, or is professional help recommended?

- While some simple repairs like reprogramming the transponder key may be done by a DIY enthusiast, diagnosing and repairing complex issues with the PATS system may require professional help from a qualified technician.

8. How serious is OBDII code B1600, and can I continue driving my vehicle with this code?

- OBDII code B1600 is related to the vehicle's anti-theft system, and it can prevent the vehicle from starting. It is recommended not to drive the vehicle until the issue is diagnosed and repaired to avoid being stranded.

9. Will disconnecting the battery reset OBDII code B1600?

- Disconnecting the battery may temporarily clear the code B1600, but if the underlying issue is not addressed, the code is likely to reappear once the vehicle is started again.

10. How long does it typically take to repair OBDII code B1600?

- The time taken to repair OBDII code B1600 can vary depending on the underlying cause. Simple fixes like reprogramming a key may take a short time, while diagnosing and repairing complex PATS system issues may require more time.

Discuss the causes and fixes for B1600 OBDII Code

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  • My ford explorer 2007 doesn't move when i put it in Drive mode, driving only with 1, 2 & 3 gears maunually until vehicle reaches to 60kmph. After 60kmph, most of the time D mode works. I have three error codes. P1700(Tranmission system problems, P0731- Powertrain(Gear 1 Incorrect ratio) & P0741-Powertrain (Torque converter clutch circuit performance or stuck off).
    What is the meaning for above codes and kindly advise whether is this a major issue and/or how can we fix it. Thanks!

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