Code P0122, Throttle Position Sensor Signal Low: Notes

Throttle Position (TP) sensor provides a voltage signal that changes relative to throttle blade angle. Signal voltage will vary from .20-.74 volt at idle to greater than 4 volts at Wide Open Throttle (WOT). TP sensor signal is one of the most important inputs used by control module for fuel control and for most other control module control outputs.

1. Determines if conditions necessary to set code exist.
2. Simulates Code P0123 (high voltage). If control module recognizes high signal voltage, control module and wiring are okay.
3. Simulates a high signal voltage. Checks signal circuit for an open.