Circuit Description

TP sensor is located on throttle body and has a variable resistor integral to TP sensor. TP sensor monitors throttle opening. ECM determines vehicle driving condition and adjusts air/fuel mixture accordingly. DTC is set when ECM detects voltage is out of range on VTA circuit. Possible causes are:

• TP sensor circuit is open or shorted.
• Defective TP sensor.
• Defective ECM.