AutoCodes – Mercury – B1602 Mercury

B1602 Mercury Code - PATS Received Invalid Format Of 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: B1602 Mercury indicates PATS Received Invalid Format Of 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.

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Code Popularity 1,672

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on May 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1602 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 B1602 Mercury - PATS Received Invalid Format Of Key-Code From Ignition Key Transponder - AutoCodes.com — B1602 Mercury Code - PATS Received Invalid Format Of Key-Code From Ignition Key Transponder

What does this mean?

What are the Possible Causes of the DTC B1602 Mercury?

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

How to Fix the DTC B1602 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 B1602 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.

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Get the B1602 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 B1602 Mercury Code

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

The common symptoms include the engine not starting, the vehicle going into anti-theft mode, and the security light flashing or staying on.

2. What does the OBDII code B1602 in Mercury vehicles indicate?

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

3. What are some possible causes of OBDII code B1602 in a Mercury vehicle?

Possible causes include a faulty ignition key transponder, issues with the PATS module, wiring problems, or a malfunctioning PCM (Powertrain Control Module).

4. How can I diagnose OBDII code B1602 in my Mercury vehicle?

Diagnosis typically involves checking the ignition key transponder, inspecting the wiring for any damage, and using a diagnostic scanner to read the fault codes stored in the PCM.

5. How can I repair OBDII code B1602 in my Mercury vehicle?

Repair options may include reprogramming the ignition key transponder, repairing or replacing damaged wiring, resetting the PATS system, or replacing the PATS module if necessary.

6. Can I drive my Mercury vehicle with OBDII code B1602?

It is not recommended to drive the vehicle with code B1602 unresolved, as it may lead to starting issues or the vehicle going into anti-theft mode while driving.

7. How much does it typically cost to repair OBDII code B1602 in a Mercury vehicle?

The cost of repair can vary depending on the underlying cause. It is recommended to get a diagnostic assessment from a qualified mechanic to determine the exact repair cost.

8. Is OBDII code B1602 a common issue in Mercury vehicles?

OBDII code B1602 related to PATS issues is relatively common in Mercury vehicles, especially in models equipped with anti-theft systems.

9. Can I reset OBDII code B1602 in my Mercury vehicle without professional help?

In some cases, you may be able to reset the code by disconnecting the battery for a few minutes. However, it is recommended to address the underlying issue to prevent the code from reappearing.

10. How can I prevent OBDII code B1602 from occurring in my Mercury vehicle?

To prevent code B1602, ensure your ignition key transponder is in good condition, avoid damage to the wiring, and follow proper maintenance practices for your vehicle's anti-theft system.