DTC 23, Throttle Position Sensor MISADJUSTED: Notes

The Throttle Position (TP) sensor provides a voltage signal that changes relative to throttle opening. Signal voltage will vary from about 0.5 volt at idle to over 5 volts at Wide Open throttle (WOT). DTC sets when ECM senses that voltage is not between 0.25-1.35 volts at ECM terminal A15, for at least 30 seconds, and engine speed is 550-650 RPM.

1. This confirms DTC 23 fault is present.
2. This test determines if sensor signal circuit is shorted to ground.
3. Adjust throttle position sensor. See THROTTLE POSITION SENSOR in REMOVE/INSTALL/OVERHAUL article in this section.