I HAVE A 1996 FORD RANGER V6 4.0 AND I KEEP GETTING CODE PO402 I HAVE REPLACED EVERYTHING. THE EVR SOLENOID WHEN CHECKED FOR POWER I FOUND IT IS ALWAYS HOT. WHAT TELLS THE COMPUTER TO ENERGIZE THE SOLENOID, AND HOW DOES THE COMPUTER DO THAT, DOES IT SUPPY POWER OR GROUND , ALSO COULD THE THE EGR TUBE WHERE THE HOSES FROM THE DPFE SENSOR GO SOME HOW CAUSE THIS CODE? DOES THE TEMP SENSOR HAVE ANYTHING TO DO WITH EGR FLOW?

SHEILA CARVELLI, April 2008

SOMEWEHRE IN ANOTHER POST READ THAT THE DPFE SENSOR CAN CAUSE FAULT READING ON THE EGR AND SO ON THE ALERT CHECK ENGINE YOU CAN REPLACE THE THE DPFE SENSOR ...

JORGE, May 2008