Note On Intermittents
WARNING: This page is about a different car, the 1992 Cadillac Seville and 1992 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
With engine running, manipulate O2 sensor harness, PCM wiring and connectors while observing PCM parameter ED32. If fault is induced, ED32 will jump to less than .37 volt and ECON status light will go off. Manipulate circuit No. 413 ground to engine, and look for a loose ground eyelet or ground eyelet installed at wrong location. If lean engine operation is suspected, refer to TESTS W/O CODES article in this Section. If O2 sensor circuit appears to be okay, go to PFI CHART A-6, OXYGEN (O2) SENSOR TEST .