Throttle Position Sensor
WARNING: This page is about a different car, the 2003 Isuzu Rodeo Sport, 2003 Isuzu Rodeo, 2003 Isuzu Axiom, and 2003 Isuzu Ascender. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
See THROTTLE POSITION SENSOR OR THROTTLE SWITCH
in ON-VEHICLE ADJUSTMENTS article for throttle position sensor/switch adjustment procedures.