Notes On Intermittents

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 Code P085 may set due to an engine overheated condition in which PCM will only allow engine to run on 4 cylinders, causing a high idle throttle angle. If this occurs, clear PCM Code P085, reset idle learn using PCM override PS13 and perform TP sensor/idle learn.

Fig 1: Code P085 Schematic, Idle Throttle Angle Too High

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code P085 Diagnostic Flow Chart, Idle Throttle Angle Too High

Courtesy of GENERAL MOTORS CORP.