TKO

I had 3 codes on my friends windstar. Bank one and bank 2. insufficient flow. I reset the codes, and what do you know, the light is back on. Threw my reader on. now its only one code. "P0401 exhaust gas recirculation. -insufficient flow detected." What is this caused from? i thought it was gas flow, gasoline, i read it wrong, so its exhaust gas going back into the engine?

Bert

That's the exhaust going back into the engine. It keeps the engine from pinging and cuts NOX.

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Bert

TKO

so is it a sensor or the internal flange located in the Y-pipe? or blockage?

Bert

It could be any one of them. You can run vacuum to the valve and see if the engine runs rough or stalls when you do.

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Bert

TKO

where and how would i do that? I have never done that before

Bert

Here's some good info on that. Part 1 -How to Test the Ford EGR Valve and DPFE Sensor.

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Bert

TKO

Thanks bert. Ill let you know how it goes

jartsihart

HI !

Have you checked this site ???

2000 Ford Windstar (Codes 171 and 174)