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 P0103: Notes

DTC P0103 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0103

MAF circuit high input

DETECTION CONDITION

The PCM monitors input voltage from the MAF sensor when the engine is running. If the input voltage is above 4.9 V , the PCM determines that the MAF circuit has a malfunction.

Diagnostic support note

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

POSSIBLE CAUSE

MAF sensor malfunction
Connector or terminal malfunction
Short to power supply in the wiring harness between MAF/IAT sensor terminal C and PCM terminal 1P
Open circuit in the wiring harness between MAF/IAT sensor terminal B and PCM terminal 11

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.