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 MX-5 Miata BaseFACTORY OEM SERVICE PROCEDURE

DTC P0102: Notes

DETECTION CONDITION AND POSSIBLE CAUSE (DTC P0102)

DTC P0102

MAF sensor circuit low input

DETECTION CONDITION

The PCM monitors input voltage from the MAF sensor when the engine running. If the input voltage is below 0.21 V , the PCM determines that the MAF circuit has a malfunction.

Diagnostic support note

This is a continuous monitor (CCM).
The MIL illuminates if the PCM detects the above malfunction condition during first drive cycle.
PENDING CODE is available if the PCM detects the above malfunction condition.
FREEZE FRAME DATA is available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

MAF sensor malfunction
Connector or terminal malfunction
Short to ground in wiring harness between MAF/IAT sensor terminal C and PCM terminal 1AK
Open circuit in wiring harness between MAF/IAT sensor terminal C and PCM terminal 1AK
Open circuit in wiring harness between main relay and MAF/IAT sensor terminal A
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.

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