3,0 TDI glow plug And DPF Sensor Error codes

[Richie Taylor]

Hi All,
Firstly sorry for the long post..

I'm a new member here, hoping someone can help me out with a couple of fault codes.
Car is a 3.0 TDI Quattro Cab on a 56 plate. approx 77,000 miles.

I have VCDS, and will attach the errors below.

A couple of weeks ago, the DPF light came on (On it's own, no management light)
This was shortly after startup, and no errors seemed to be stored on VCDS.
It went off after switching the ignition off and on again.
I then had a 150 mile trip with no issues and drove during that trip in sport at approx 75mph for at least 20mins. (thinking it may need a re-gen)

The light has not been back on since, I have measured the soot levels after the trip and they read as below after a 30 mile drive:

Monday,23,July,2012,08:48:02:10074
VCDS Version: Release 10.6.4 (x64)
Data version: 20110418
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Address 01: Engine (8H0 910 401 A)

08:47:40 Group 104
0.24 (no units)
9.0 (no units)
13.5 (no units)
1230 km Mileage

08:47:40 Group 102
266.8°C Temperature
265.5°C Temperature
7 mbar Pressure
21 mbar Pressure

So, I thought everything was ok..............However I now have engine / emission warning light on (see below errors)

Sunday,05,August,2012,15:16:36:10074
VCDS Version: Release 10.6.4 (x64)
Data version: 20110418
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Address 01: Engine Labels: Redir Fail!
Control Module Part Number: 8H0 910 401 A HW: 8E0 907 401 AL
Component and/or Version: 3.0L V6TDI G000AG 0060
Software Coding: 0011171
Work Shop Code: WSC 01286 386 08256
VCID: 204BE4B38A53
3 Faults Found:

005659 - Glowplug for Cylinder 2 (Q11): Open Circuit
P161B - 001 - Upper Limit Exceeded
Freeze Frame:
Fault Status: 01110001
Fault Priority: 0
Fault Frequency: 1
Mileage: 123808 km
Time Indication: 0

Freeze Frame:
RPM: 882 /min
Torque: 97.5 Nm
Speed: 0.0 km/h
Duty Cycle: 1.0 %
Voltage: 14.29 V
Duty Cycle: 24.5 %
Temperature: 16.2°C

005663 - Glowplug for Cylinder 6 (Q15): Open Circuit
P161F - 001 - Upper Limit Exceeded
Freeze Frame:
Fault Status: 01110001
Fault Priority: 0
Fault Frequency: 1
Mileage: 123808 km
Time Indication: 0

Freeze Frame:
RPM: 882 /min
Torque: 97.5 Nm
Speed: 0.0 km/h
Duty Cycle: 1.0 %
Voltage: 14.29 V
Duty Cycle: 24.5 %
Temperature: 16.2°C

009299 - Diesel Particle Filter; Differential Pressure Sensor: Implausible Signal
P2453 - 001 - Upper Limit Exceeded
Freeze Frame:
Fault Status: 01110001
Fault Priority: 0
Fault Frequency: 3
Mileage: 125203 km
Time Indication: 0

Freeze Frame:
RPM: 0 /min
Speed: 0.0 km/h
Pressure: 14 mbar
(no units): 0.0
Temperature: 300.9°C
Absolute Pres.: 20.4 mbar
Temperature: 12.6°C

Readiness: 1 1 0 0 0

The glow plug error has been coming up for a while, any suggestions or should I just change all six plugs at this mileage?
Any thoughts on the DPF warning light and then sensor error, faulty sensor?

Cheers All

[mhobson]

Hello Ritchie,

Did you find out the problem yet?

My wife's A4 3.0 tdi quattro cab has come up with all 6 cylinders glow plug open circuit fault codes.

I cannot believe all glow plugs have simultaneously blown, I wonder is there a controller which could be faulty?

I hope yours is sorted,

Regards,

Michael

[mhobson]

p.s. I should point out that the glow plug light is not illuminated except on startup as normal and the car is not and has not been in limp mode with flashing glow plug light.

[Richie Taylor]

Hi Michael,

Mine was indeed two duff glow plugs, I changed all six as I figured they had all done the same mileage and with two failing decided that was the way to go. All six seems unlikely, but not impossible I suppose. You can apparently measure the resistance of the individual plugs to see if they have failed.

For anyone having similar DPF issues to mine, the problem was down to the differential pressure sensor. Cost about £45 + Vat from Audi and car had been ok for approx 2500 miles.

I do now have some new "issues" of course, but thats for another day! (flickering xenon and drivers seat moving on its own and flattening the battery...)

Regards

Richie

[mhobson]

Thank you Ritchie,

If ever I have a duff glowplug I always change the set to keep the current even, but I have never had a set of 6 go at the same time.

What is odd is that after I cleared the fault codes the light came on again when my wife next used the car, but before I could check VCDS she filled the car with diesel and the light went out. There has never been a fault code for the fuel level sensor which baffles me, but with these new complicated cars that is not difficult.

Regards,

Michael