DPF pressure sensor or just a blocked DPF

Hi a friend of mine has a 2010 2.0 CAHA TDI Le Mans A6.

I scanned it with my VCDS as the his MIL lamp was on.

He did not have the regen light on.

Scan;
Address 01: Engine (J623-CAHA) Labels: 03L-906-022-CAG.clb
Part No SW: 03L 906 019 AG HW: 03L 906 022 FG
Component: R4 2,0L EDC H01 5423
Revision: 11H01--- Serial number:
Coding: 0105002C18072118
Shop #: WSC 02325 785 00200
ASAM Dataset: EV_ECM20TDI03L906019AG A01003
ROD: EV_ECM20TDI03L906019AG.rod
VCID: 70EF31D2AB8E929E643-8025


4 Faults Found:
4914 - Diesel Particle Filter; Differential Pressure Sensor
P2453 00 [096] - Implausible Signal
Intermittent - Not Confirmed - Tested Since Memory Clear
5182 - Particulate Trap Bank 1
P2002 00 [232] - Efficiency Below Threshold
MIL ON - Intermittent - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 8
Mileage: 190527 km
Date: 2013.12.14
Time: 15:32:15


5262 - Exhaust Pressure Sensor 1 (G450)
P0472 00 [032] - Signal too Low
Intermittent - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 4
Mileage: 191313 km
Date: 2014.01.19
Time: 06:36:33


5162 - Exhaust Pressure Sensor 1 (G450)
P0471 00 [101] - Implausible Signal
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 191387 km
Date: 2014.01.21
Time: 18:44:37


Readiness: 1 1 0 0 0

This car was bought with 115K on the clock and Full Audi servicing, he only does small trips city driving.

I cleared the fault but its come back.

I have recommended that he did the regen drive to see if it clears it.

Do the DPF pressure sensors give trouble on the A6's?

Next move is to replace the sensor or does anyone know of another thing to do.

I will be checking the soot levels using VCDS on friday when i go to clear the fault.

Dan

DPF pressure sensors failing affect all DPF equipped models and each car is bound to have one failure at least once in its life.

He's picked the wrong car for city driving.

I'd be trying Audi for goodwill.

Checked the car again today the MIL light on for 5162 - Exhaust Pressure Sensor 1 (G450) P0471 00 [101] - Implausible Signal.
Cleared the fault code MIL Light stayed off.
I checked the soot levels in the advance measuring blocks (UDS controller) and the calculated soot mass was 8.22g and the measured soot mass was 3.27-3.31 at 2000 rpm.
So can say that the DPF is clear as a blocked one would be around 40-95g.
Picked up a new sensor from TPS will stick on the car on monday and do the adaptation and recheck the readings.
All should be well touch wood for price of £60.16 for the sensor.

Fitted the DPF pressure sensor an easy job on 2.0 facelift car took around 20 minutes would a have been quicker if i did not have to remove the fuel filter bracket.

Carried out the adaptation of the new one 'basic settings, top of the list'.

Rechecked the readings and now his car was reading -0.39 on the measured soot level which was the equivalent to what my car reads.

Job done VCDS has been worth every penny spent on it as have now done a good few jobs with it for friends.

Dan - how do you measure soot levels on the facelift via vcds? I have to go into advanced measurements and it isn't clear what i'm looking at. Does give me time since last regen, distance in metres and a level in grammes - this part means nothing to me!

You go into Engine 01, Advance Measuring, then a options box will come up and you scroll down number 076 etc and then click on the check box.

This will then add this to the main screen, just check any other options that you want to see and when finished picking up the bits that you want just minimize the box.

For most things you should have the car running to see the live data.

You also have the log facility which will record the data into an excel file for easy reviewed if you took the car on a run.

Never operate VCDS whilst driving a car.

where can i get my hands on the diagnostic equipent you guys are using

See list of official suppliers on Ross-Tech's site here:

Ross-Tech: Distributor List

There is a member on here called NHN he is an official seller.

You can also get it the cable from Gendan Automotive Products :: Professional and DIY car diagnostic tools :: EOBD, OBD II, CAN and VAG Code Readers and Scan Tools

hi i ave just read this as i have got similar i dont have to start my car
and its in limp first thing on morning this is my problem my a5 3.0tdi has got dpf preasure sensor problems now let me start by saying the dpf has been taking out the cars been mapped its had new sensor made sure link pipe was sealed had sur contens reset the sensor re programmed carwas fine yesterday but whent to start today glowplug light on without startup when it does start its in limp mode and sounds louder than normal if i put vcds on it comes up with low signal to dpf sensor my question is would this be down to the map or could it be summit else thanks korky

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