ECM Code E98: Park/Neutral To Drive/Reverse While Outside Of ISC Control Range: Action
WARNING: This page is about a different car, the 1990 Cadillac Fleetwood and 1990 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
ECM will retard ignition timing and set Code E98.
NOTE:
Test number refers to test number on diagnostic chart.
Test Number 1) Replace switch if display sequence does not match chart after adjustment is made.