DTC P1516: Commanded & Actual Throttle Position Malfunction: Description

The commanded throttle position, based on Accelerator Pedal position (APP) and possibly other limiting factors, is compared to the actual throttle position. The TP values should be within a calibrated range of each other. The Throttle Actuator Control (TAC) module monitors the commanded and actual throttle position. This will DTC set if TAC module detects this condition and sends the message to the PCM across serial data.