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DTC P0121 Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance Problem: Description

WARNING: This page is about a different car, the 2009 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.

Refer to DTC P0120  .

DTC DETECTION CONDITIONS CHART

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