Year of Manufacture *: 2006
Engine Size and Code *: 1.9DTH
( Optional ) Scanner Used: Autocom
( Optional) Fault Codes: P1909
After initial checks P1909 was displayed (DPF blocked) scan tool showed 4.8V on WOT , connected scope to DPF pressure sensor which confirmed voltage correct. Mytivac showed 18psi back pressure to the DPF sensor & with soot content at 100% i reluctantly tried to force the regen but not possible.
With time against me i opted for a new DPF, but was struggling to get a brand i new & trusted on this one, ECP supplied what i could get a hold off (can't remember the brand). New DPF fitted, WOT voltage showing around 0.8-0.9V on WOT, result or so i thought!
Car back in today with same fault code & in limp mode.
Live data displayed soot density @ 20%, DPF pressure @ 2000RPM showing 18-22KPA with 1V signal , back pressure showing 3.5-4psi WOT around 12-13 PSI WOT confirmed on Pico @ 3.3 Volts .I checked pressure senior with mytivac which appears to be operating smoothly & reaction time was flawless. The car has barely done 400 miles since DPF replacement so I'm a bit confused as to why this fault has come back so fast & with voltages that don't match up with a new sensor.
Add : I did adapt the ecu to the new dpf
The car was in previously when it had an Egr valve replacement about 2 months ago as the unit was sticking (replaced with pieburg unit)
My head is saying this is a cheap sh*t Dpf thats causing the issue due to the high pressure/volts present
Has anyone had any similar problems (sorry i haven't had to to search previous posts)
My sanity in need of help
Regards
John
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