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Engine warning light on 2.0 TDCI


TheRookie
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On my way back from work the Engine warning light came on.
 Engine pulls fairly well all the way up to roughly 2500 rpm at which the car starts slowing down regardless of accelerator pedal position.

oil is OK, water temp is fine too, No other warning lights came on. The car has been serviced 1600 miles ago.

I suspect EGR or DPF but as I don't have enough knowledge of the oily bits so I need some directions. :)

 

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It was an intermediate service, so they did whatever had to be done (I guess). Some filter was changed but I can't decypher from the receipt which one was it.

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Took it to the garage today and they say that DPF is clogged. They tried to force regeneration when the car was stationary but it refused to do so.

How do I force DPF regeneration?

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3 hours ago, TheRookie said:

How do I force DPF regeneration?

It has to be done via the diagnostic interface, using either the Ford IDS system (at a garage), or Forscan.

However, if the garage could not do it, then it may still refuse. 2 reasons I know of for refusal to regen:

Another error exists that affects the systems used for regen. And that is quite a lot of systems & sensors. But there will be error codes to indicate what this reason is.

The DP is much too high, and the pcm (engine computer) thinks the danger of thermal run-away is too great. This is where a lot of soot starts to burn too quickly, and can overheat, & damage the DPF.

Forscan will identify all DTCs (error codes) that are present, and can initiate forced regen, if the pcm will allow it.

For Forscan, (used on a DPF problem), See:

And for a forced regen being done, see:

From all this you may see that the DPF system is rather complex. One thing to check before assuming the DPF is clogged, is the DP sensor & the hoses to it. Failures here are quite common, and make the pcm think the DPF is clogged.

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On 06/10/2016 at 7:03 PM, TheRookie said:

Took it to the garage today and they say that DPF is clogged. They tried to force regeneration when the car was stationary but it refused to do so.

How do I force DPF regeneration?

So the dpf was at 60% ?

a Manual Regen usually suffices (done at dealership via OBD)

mine did that due to the turbo charge pipe popping off and because i continued driving it (long story) it clogged the dpf)

Jamie

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  • 1 month later...

Finally an update:

I've bought ELM327 off eBay and used it to force regeneration. The car obeyed but I've noticed that the pressure was exactly zero. Now, I can't imagine that even if DPF is fully clogged the pressure is going to be precisely zero. It just doesn't seem right. So I decided to concentrare on other causes: either pipes or sensor.

Then I had a chat with various DPF "specialists" and they told me that there is no way sensor/pipes will cause this. So I decided to take the car to a Polish garage nearby and asked them to put the car on ramp (they only charged me a fiver for the privilege).

Once the car was lifted it was evident that the pressure pipe going to DPF was a culprit as it was split in half. Ordered new set Febi 45777 (specification) and fitted it today at the same garage (another 20 quid).

Checked the pressure and it seem OK. The car is happy (so far),

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