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Home >> Scion >> 2005 >> tC Standard >> Repair and Diagnosis >> Engine Performance >> SFI System (2AZ-FE) >> DTC P0121: Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance Problem >> Circuit Description
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Circuit Description

Refer to DTC P0120  .

DTC DETECTION CONDITIONS CHART

DTC No. DTC Detection Conditions Trouble Areas
P0121 Difference between VTA1 and VTA2 voltages less than 0.8V, or more than 1.6V for 2 seconds (1 trip detection logic)
  • TP sensor (built into throttle body)