DTC P1123: TP Sensor Stuck Open (More Than Expected): Condition

DTC is set if TP input is more than 50 percent when engine speed is more than 500 RPM and MAF input is less than 1.09 lbs. min. for 5 seconds or more. Possible causes are:

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