Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2006 Mazda 6 MazdaspeedFACTORY OEM SERVICE PROCEDURE

DTC P0480: Notes

DTC P0480 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0480

Fan control circuit problem

DETECTION CONDITION

The PCM monitors the input voltage from the fan control module. If the voltage remains low or high, the PCM determines that the fan control circuit has a malfunction.

Diagnostic support note

This is a continuous monitor (Other).
The MIL does not illuminate.
FREEZE FRAME DATA is not available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

Fan control module malfunction
Connector or terminal malfunction
Short to the power supply in the wiring harness between fan control module terminal 1B and PCM terminal 4A
Short to ground in the wiring harness between fan control module terminal 1B and PCM terminal 4A
Open circuit in the wiring harness between fan control module terminal 1B and PCM terminal 4A
PCM malfunction

Courtesy of MAZDA MOTORS CORP.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.