PCM Code E047 stored as history can indicate 2 failures:

Open in circuits No. 800E and 800F. Symptoms will be: A - SYSTEM FAULT message on DIC panel. B - SERVICE ENGINE SOON and CHECK INFO CENTER lights on. C - Diagnostics entered and NO PCM DATA displayed on DIC panel. D - When fault is repaired, PCM Codes E047 and IO34 show as history codes.
Grounded circuit No. 800 at any point. Symptoms will be: A - SYSTEM FAULT message on DIC panel. B - SERVICE ENGINE SOON light on. C - Instrument panel gauges flash. D - Climate control panel goes blank. E - Engine cooling fans go on high speed. F - Diagnostics disabled, SYSTEM FAULT message stays on DIC panel. G - When fault is repaired, diagnostics show PCM Codes E047, IO33, IO34 and IO37 as history codes.