THIS A RESP TO CARL'S ORIG POST. I'VE ALSO SEEN A FEW OUT OF RANGE EGR VALVE POS SENSORS(BLACK)CAUSE THIS CAUSE ECU SEES A PERCIEVED VOLTAGE TOO HIGH OR LOW & TRIES TO [...] SENSOR IS AS IMPORTANT TO ECU AS TPS .AND GOOFS UP 3X AS [...] GOOD CALL,KEVIN I JUST ... Login to read more.