Code P027, Open Throttle Position Switch Signal: Action
WARNING: This page is about a different car, the 1995 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
PCM turns on MIL. EGR is disabled. Garage shift adapts are maintained at current levels.
NOTE:
Test numbers refer to numbers on diagnostic chart.
- LO fan status light should cycle from ON to OFF to ON when accelerator is depressed and released.
- Checks if fault is with throttle position switch.
- Checks PCM's ability to recognize signal if circuit No. 427 is open.
- Checks if circuit No. 451 is open.