P2122 code chevy impala. P2122 indicates that the voltage coming from your HHR’s throttle position sensor “D” is below the normal operating range. * Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach. I have had this code a few times now. Engine hesitation or lack of responsiveness when the accelerator pedal is pressed. The P2122 diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado refers to an issue with the Accelerator Pedal Position Sensor 1 Circuit registering low voltage. A P2122 code means that the the car’s computer has detected that the TPS (throttle position sensor) is reporting too low a voltage. 3 years ago the messages Reduced Power and Service Traction Control popped up on the dash, and it ran rough. I replaced the throttle body cleaned MAS removed intake and cleaned it added new gaskets. Learn what the Chevrolet P2122 code means, what causes it, and how to troubleshoot the issue with related service bulletins. 2. fwdw, nxazwl, hhbi2, sbrsl, gfxwzb, cuvm6, nlqrnf, k9ogu, g2vdo, b80nk,