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Old 08-11-2019   #1
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DPF Threashold (Engine failure light)

Hello All,

Can anyone assist with some advice please. I own a 1248cc 2006 Fiat Doblo with 86000 on the clock. Over the last year the car would loose power and become sluggish. A diagnostic check showed a fault of P2002 DPF efficiency low threshold and the dash Engine failure light came on. The DPF filter actually had a small hole in it so it was replaced. The loss of power continued and it appeared the engine could not breath properly. I took the car to Fiat who could not diagnose the fault. I fitted a new oil breath and pipes with no luck. The back pressure issue continued resulting in the turbo blowing so that was replaced.

The question is does anyone know how to resolve the DPF fault even though a new filter has been fitted. Every time it is reset the engine failure light comes on and the fault shows the DPF efficiency is low. I still feel there is a back pressure issue with the engine because of the DPF issue ?

Thank you
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Old 10-11-2019   #2
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Re: DPF Threashold (Engine failure light)

Restricted exhaust baffle broken on silencer just a thought
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Old 16-11-2019   #3
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Re: DPF Threashold (Engine failure light)

@Donaldvan

Are you able to read the parameters from the ECU ?

IF SO.. you could potentially uncouple the exhaust momentarily.. gauging the differences
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