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Home >> Toyota >> 2003 >> Sienna LE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self Diagnostics >> Diagnostic Tests >> DTC P0101: Mass Airflow Meter Circuit Range/Performance >> Possible Causes

Possible Causes

This DTC uses two-trip detection logic. DTC is set when ECM detects MAF meter output is greater than 2.2 volts with throttle valve closed with engine speed of 900 RPM or less, or MAF meter output is less than 0.25 volt with Throttle Position (TP) sensor VTA circuit signal voltage of 0.10 volt or more with engine speed of 1500 RPM or more. Possible cause is defective MAF meter.

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