Note on Intermittents
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.
If an intermittent Code E26 is being set, operate vehicle while observing throttle switch status (OFF on ECCP) and throttle angle parameter P.0.1 simultaneously. If throttle switch ever fails to open upon opening of throttle, check that circuit for a malfunction. If throttle angle ever jumps to greater than 13 degrees with throttle closed, investigate TPS circuits for a malfunction.