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 MANUALSMAZDA20066 I, 4D SEDAN, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM L3)DTC P2004NOTES

2006 Mazda 6 i, 4D Sedan, Automatic

DTC P2004: Notes

2006 Mazda 6 i, 4D Sedan, AutomaticSECTION Notes

DTC P2004 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P2004

Variable tumble shutter valve stuck open

DETECTION CONDITION

PCM monitors mass variable tumble shutter valve position using variable tumble shutter valve switch. If PCM turns the variable tumble solenoid valve on but variable tumble shutter valve position still remain open (variable tumble shutter valve switch off), PCM determines that variable tumble shutter valve has been stuck open.

Diagnostic support note

This is a continuous monitor (CCM).
MIL illuminates if PCM detects above malfunction condition in two consecutive drive cycles or in one drive cycle while DTC for the same malfunction has been stored in PCM.
PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle.
FREEZE FRAME DATA is available.
DTC is stored in PCM memory.

POSSIBLE CAUSE

Variable tumble shutter valve actuator malfunction (stuck open)
Misconnected or pulled out vacuum hose
Variable tumble solenoid valve malfunction
Open circuit in wiring between variable tumble solenoid valve terminal B and PCM terminal 2I
Short to power in wiring between variable tumble solenoid valve terminal B and PCM terminal 2I
Open circuit in wiring between variable tumble shutter valve switch terminal C and PCM terminal 2AE
Short to power in wiring between variable tumble shutter valve switch terminal C and PCM terminal 2AE
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.