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 P0108: Notes

DTC P0108 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0108

MAP sensor circuit high input

DETECTION CONDITION

PCM monitors input voltage from the MAP sensor when the intake air temperature is above -10°C {14°F} . If the input voltage is above 4.9 V , the PCM determines that MAP sensor circuit has a malfunction.

Diagnostic support note

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

POSSIBLE CAUSE

MAP sensor malfunction
Connector or terminal malfunction
Open circuit in the wiring harness between MAP sensor terminal A and PCM terminal 2H
Open circuit in the wiring harness between MAP sensor terminal D and PCM terminal 1J
MAP sensor signal circuit short to the constant voltage supply circuit
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.