INSPECTION PROCEDURE 1. INSPECT IGNITION SWITCH ASSEMBLY
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Toyota Tundra Service Manual > Sfi System: Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance (P2121)
DESCRIPTION HINT: Refer to DTC P2120 (See page ). DTC No. DTC Detection Condition Trouble Area P2121 Either conditions (1) or (2) met for 0.5 seconds (1 trip detection logic): (1) Difference between VPA and VPA2 is less than 0.4 V, or more than 1.2 V. (learned value of accelerator off position) (2) ...
