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.

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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 17 (ON-BOARD DIAGNOSTIC (ENGINE CONTROL SYSTEM L3) (2 OF 5))DTC P0103 [L3]NOTES

2008 Mazda 6 s Sport, 4D Hatchback, Standard

DTC P0103 [L3]: Notes

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Notes

WARNING: This page is about a different variant/trim than selected.

DTC P0103 [L3] DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0103

MAF circuit high input

DETECTION CONDITION

PCM monitors input voltage from MAF sensor when engine is running. If input voltage at PCM terminal 1AK is above 4.9 V , PCM determines that 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.
PENDING CODE is available if PCM detects the above malfunction condition.
FREEZE FRAME DATA is available.
DTC is stored in the PCM memory.

POSSIBLE CAUSE

MAF sensor malfunction
Connector or terminal malfunction
Short to power supply in wiring harness between MAF/IAT sensor terminal C and PCM terminal 1AK
Open circuit in MAF/IAT sensor ground circuit
PCM malfunction

Courtesy of MAZDA MOTORS CORP.

RENDER: 1.0x

NO RELATED

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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.