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Home >> Toyota >> 2003 >> Sienna LE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self Diagnostics >> Diagnostic Tests >> DTC P0100: Mass Airflow Meter Circuit >> Possible Causes

Possible Causes

DTC is set when ECM detects an open or short in MAF meter circuit for more than 3 seconds with engine speed at 4000 RPM or less. If DTC P0100 exists, ECM will operate in fail-safe mode in which ignition timing is fixed at 10 degrees BTDC. Possible causes are:

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