Note On Intermittents

With engine running, manipulate oxygen sensor, PCM wiring and connectors while observing PCM parameter ED33. If fault is induced, ED33 will jump to less than .37 volt and ECON status light will go off. Manipulate ground to engine circuit No. 413, and look a loose ground eyelet or ground eyelet installed at wrong location. If lean engine operation is suspected, perform PFI SYSTEM CHECK. If oxygen sensor circuit seems to be okay, go to CHART A-9, OXYGEN SENSOR DIAGNOSIS.

Fig 1: PCM Code EO44, Schematic, Right O2 Sensor Lean Signal

Fig 2: Flow Chart, PCM Code EO44, Right O2 Sensor Lean Signal