Notes On Intermittents

If Code EO21 is intermittent, manipulate related wiring while observing ECM parameter ED01. Check TPS and TPS test point connectors for shorts to voltage.

Cycle TPS through its travel and tap on TPS with a pencil or pocket screwdriver to test for intermittent TPS. If fault is induced, the parameter will skip to a high throttle angle (72 degrees or higher).