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Check Engine Light

My check engine light has been on for awhile. I did get a scan and appearently it has something to do with the EGR. I did take it in for the Ontario Emission test thing and it passed. Any idea what it might be ?. A defective sensor perhaps. ? And my next chore is to change the plugs. It is a 3.8 Litre Windstar. Any suggestions on how to get at the back three plugs. Can they be reached easier from underneath or are there things in the way. Fixed my ignition switch problem. Those tilts are a bear to get back together but i managed nicely with a C Clamp and a hollow spark plug socket. Sorry to be so vague but if there is something i'm missing you need to know just ask away.

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Seller
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What is the code?

P0401 - Insufficient EGR flow?

Matt

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sleepdog

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Seller
402 would be excess EGR flow, not a good thing. With 401 you might fail emissions for having the light on or the levels being too high, but with 402 somehow it can damage the engine over time, forget why, but it was explained in the haynes manual I have for my 2000 taurus. If I get a chance I'll have a look again.

Matt

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sleepdog

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Seller

Reply to
Sharon K.Cooke

I know on the Taurus the DPFE sensor was/is a common point of failure. Replacement costs about $70 from the ford dealer.

There are also tests you can perform on the DPFE just google it.

Don't know if this applies to your 3.8L but on the Taurus I read that the EGR ports in the throttle body can get clogged and trip the code for insufficient EGR. Just google on P0401 you should be able to find what you need.

Matt

Reply to
sleepdog

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