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B2428: A/C Post Heater Sensor #2 Circuit Failure

OTHER
System
Body

What Does B2428 Mean?

B2428 is a manufacturer-specific diagnostic trouble code: A/C Post Heater Sensor #2 Circuit Failure. 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 B2428

Frequently Asked Questions

What does B2428 mean?
A/C Post Heater Sensor #2 Circuit Failure. This is a manufacturer-specific code for OTHER vehicles.
Which vehicles get code B2428?
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.

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