ECM code P-0401

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Alt Beer - 23 May 2008 10:31 GMT

My UK 2004 Focus TDCi is reporting error code $10 ECM P-0401 "exhaust gas
recirculation flow insufficient". It drives perfectly with no problem
apparent, good fuel economy (50 mpg) and no black smoke. The engine
management warning light came on about six months ago. I had the code reset
and the light went out and stayed out until a few weeks ago when the light
came on again. Yesterday I had the code reset again and the light is still
out today.

As the car drives perfectly is this likely to be caused by an intermittent
connector rather than a system fault?

Could anyone give me a clue as to which connector my be intermittent (and
where it is located on the car).

Thanks

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Tim.. - 24 May 2008 10:39 GMT

> My UK 2004 Focus TDCi is reporting error code $10 ECM P-0401 "exhaust gas
> recirculation flow insufficient". It drives perfectly with no problem
[quoted text clipped - 10 lines]
> Could anyone give me a clue as to which connector my be intermittent (and
> where it is located on the car).

Without checking the car, i would hazzard a guess that either your egr valve
is partially blocked, or the egr cooler is.

Which engine is this?

tim..

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Alt Beer - 24 May 2008 11:19 GMT

>> My UK 2004 Focus TDCi is reporting error code $10 ECM P-0401 "exhaust gas
>> recirculation flow insufficient". It drives perfectly with no problem
[quoted text clipped - 20 lines]
>
> tim..

Thanks Tim, its the 1.8 TDCi (115 version)

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BugBoy - 27 May 2008 01:33 GMT

You Need an EGr Dpfe sensor... common failure and real easy to change

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