DH3 - Check For Stuck TP Sensor
- Key On, Engine Off.
- Access TP PID with the Scan Tool.
- Slowly move throttle from closed throttle position to wide open throttle position and observe the TP PID.
- While opening the throttle, is there a sudden drop in the TP PID to below 9.80% (0.49 volts)?
YES -- TP sensor has internal substrate problem. REPLACE TP sensor. Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes
NO -- Go to DH4. DH4 - Check TP Sensor Signal to PCM