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2003
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MX-5 Miata Base, Standard
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Engine Controls - Self-Diagnostics
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Diagnostic Tests
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DTC P2004: Variable Tumble Control System Malfunction - Stuck Open
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Possible Causes
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Possible Causes
Connector or terminal malfunction.
Open or short circuit between VTCS vacuum switch and PCM.
PCM malfunction.
Vacuum line malfunction.
VTCS vacuum switch malfunction (stuck open).
VTCS solenoid valve malfunction (stuck open).