Jul 21, 2020 · Diagnostic Trouble Code (DTC) P0122 stands for “Throttle Position Sensor/Switch A Circuit Low Input.” The powertrain control module (PCM) logs a P0122 code when the throttle position sensor “A” displays lower voltage than normal. As its name implies, the throttle position sensor keeps track of the throttle’s position. It is usually ... OBD-II PIDs. P-codes, or OBD-II PIDs On Board Diagnostics “Parameter IDs”, are codes used to request data from a vehicle, used as a diagnostic tool. These codes are part of SAE standard J/1979, required to be implemented in all cars sold in North America since 1996. Freightliner. Great Wall. Honda. TPS65150 Low Input Voltage, Compact LCD Bias IC With VCOM Buffer. TJA1042 high-speed CAN transceiver.In addition, the voltage with the engine turned on is consistently 14.4 V or higher. Is this voltage drop acceptable, and is there a diagnosis other than a parasitic draw that I can test myself or ask a...