DTC P1122: TP Sensor Stuck Closed (Less Than Expected): Condition

DTC is set if TP input is less than 12.5 percent when ECT is more than 158°F and MAF input is more than 11.7 lbs. min.. Possible causes are:

• Throttle Position (TP) sensor malfunction.
• Corrosion on TP signal circuit.
• Voltage drop on VREF circuit.
• PCM malfunction.