DTC P1511: Throttle Control System - Limp Home System Performance: Description

Throttle control module contains a throttle control motor, 2 Throttle Position (TP) sensors, and 2 independent signal circuits that vary resistance according to changes in throttle plate position. ECM will go through a throttle position learn procedure to determine acceptable values for throttle plate position operating range. This is based on inputs from TP sensor No. 1 and TP sensor No. 2 and feedback from throttle control motor. DTC sets when ECM is in reduced performance mode and throttle position falls outside a calibrated range.