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

OTHER
System
Manufacturer-Specific Body

What Does B1602 Mean?

B1602 is a manufacturer-specific diagnostic trouble code: PATS Received Invalid Format Of Key-Code From Ignition Key Transponder. This code applies to OTHER vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of B1602

Frequently Asked Questions

What does B1602 mean?
PATS Received Invalid Format Of Key-Code From Ignition Key Transponder. This is a manufacturer-specific code for OTHER vehicles.
Which vehicles get code B1602?
This code appears primarily in OTHER vehicles. Check your owner's manual or a dealer for model-specific information.
Can I fix this myself?
Manufacturer-specific codes often require a brand-specific diagnostic scanner for full data. A dealer or specialist with the right tools will diagnose it most accurately.

What To Do Next

  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

B1600 PATS Ignition Key Transponder Signal Is Not Received B1601 PATS Received Incorrect Key-Code From Ignition Key Transponder B1603 Lamp Anti-Theft Indicator Circuit Failure B1604 Lamp Anti-Theft Indicator Circuit Open B1605 Lamp Anti-Theft Indicator Circuit Short To Battery B1606 Lamp Anti-Theft Indicator Circuit Short To Ground B1607 Illuminated Entry Input Circuit Failure B1608 Illuminated Entry Input Open Circuit B1609 Illuminated Entry Input Short Circuit To Battery B1610 Illuminated Entry Input Short Circuit To Ground