DPF questions

[Lucas_R]

DPF questions

I have a 3.0L TDI in an Audi SQ5 and keep a very close eye on the DPF and its operation.

If you are having a 15% increase in soot then I’d be pretty certain that your DPF pressure sensor is on its way out. There is 1x sensor before the DPF and 1x sensor after the DPF and it measures the pressure difference pre and post DPF to calculate how full the DPF is.

The DPF pressure sensors are generally quite a cheap part (<$200) so might be wise to replace it - unless you have access to a good quality scan tool to test the various sensors to pin point the culprit.

This ‘should be’ the correct part, but probably a good idea to check the part # from your current one. FOR VW AMAROK TOUAREG S6 S4 Q7 3.0TDi DPF PRESSURE SENSOR DPF 059906051J GENUINE | eBay

[GreyWolf]

Hi,

For anyone with the 3.0L TDI engine.

1. If you use a monitoring tool for the DPF have you ever noticed a sudden jump (>15%) in soot% for the calculated soot mass?
(If anyone knows how this value is calculated would be great. It appears as per the manual it incorporates air mass flow, lambda, dpf/turbo EGT's & DPF differential pressure sensors)

2. I am curious if I have an intermittent sensor issue. Have you needed to replace Lambda (G39) or DPF pressure sensor (G450)?

Cheers,

Greywolf