P2122 - pontiac grand prix gxp

Question

P2122 throttle/pedal position sensor/switch d circuit low input.

Answer 1

P2122 Accelerator pedal position (APP)sensor 1 voltage low

2  things that can cause this code the APP assembly or the ECM .If the 5 volts referrence to the APP is below specification the ECM needs to be replaced, If the 5 volts referrence from the ECM to the APP is good , the APP will need to be replaced.