Note on Intermittents
WARNING: This page is about a different car, the 1990 Buick Riviera and 1990 Buick Reatta. However, it is still accessible from the selected car via links, so may be relevant.
This code was designed to prevent cruise control operation when vehicle is not in a forward gear. This code can set if operator selects Neutral, Reverse or Park when cruise control is engaged. This will cause cruise to drop out until operator re-engages cruise. If operator describes condition but did not move gear selector out of forward gears, check adjustment of gear selector switch and circuit No. 434 for intermittent short to ground.