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OBD Code B2455

Aux Heater Blower Faulted

CodeB2455
DescriptionAux Heater Blower Faulted
SystemBody

What Does B2455 Mean?

Aux Heater Blower Faulted. This diagnostic trouble code (DTC) is stored when the vehicle's onboard computer detects an issue with the body.

Code Breakdown

B = Body code

2 = Manufacturer-specific

How to Fix B2455

Follow these diagnostic steps to identify and resolve the issue. Always start with the simplest checks before moving to more involved repairs.

  1. Check the blend door actuator — a clicking noise from the dash is a common sign of failure.
  2. Inspect the blower motor and resistor. Test blower motor by applying 12V directly.
  3. Check the cabin air filter and replace if clogged.
  4. Inspect the A/C compressor clutch engagement.
  5. Test the HVAC control head and its connectors.
  6. Check the temperature door position sensor if equipped.
  7. Replace the failed component and clear codes.

Note: These are general diagnostic guidelines. Some vehicles may have model-specific procedures. Always consult your vehicle's service manual for exact specifications and torque values. If you are not comfortable performing these steps, visit a qualified mechanic.

Frequently Asked Questions

Is B2455 serious?

B2455 is generally considered a low-severity code. While it should still be addressed, it is unlikely to cause immediate safety concerns. However, ignoring it long-term may lead to higher emissions or reduced fuel economy.

Can I clear B2455 myself?

You can clear any OBD-II code with a code scanner or by disconnecting the battery for 15-30 minutes. However, clearing the code without fixing the underlying problem will cause it to return — usually within one or two drive cycles. If the code triggered the check engine light, the light will come back on. Fix the root cause first, then clear the code.

How much does it cost to fix B2455?

Repair costs vary widely depending on the root cause. Some fixes are free (like tightening a gas cap) while others can cost several hundred dollars (like replacing a catalytic converter or oxygen sensor). A proper diagnosis with a professional scan tool — not just reading the code — is the first step to getting an accurate repair estimate. Many auto parts stores offer free code reading, but a thorough diagnosis usually requires a mechanic.

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