Hi,

As the title says, I am getting random DPF and MIL (check engine) lights come on (car is 2008 Skoda Octavia vRS). This has occurred several times over the last 10 days. The DPF has also been regenerating itself almost daily. Had to do the 80kmh in 4th 3 times to get rid of the filter light.

The MIL is not accompanied with any text in the MFD nor any noticeable performance degrade, which is contrary to the owners manual saying it should be in limp mode.

I have had a look with VCDS measuring block 109 and it shows 39.1 grams ash and 23.7 grams carbon.

The MIL light is caused by:

Address 01: Engine (CEG) Labels: 03L-906-022-CBA.clb
Part No SW: 03L 906 022 HF HW: 03L 906 022 GA
Component: R4 2,0L EDC G000AG 2842
Revision: --H01--- Serial number: SKX7Z0H632H0RA
Coding: 0000078
Shop #: WSC 73430 000 00000
VCID: 70E5278E6357C498D1C

1 Fault Found:
001137 - Exhaust Pressure Sensor 1 (G450)
P0471 - 000 - Implausible Signal - Intermittent - MIL ON
Freeze Frame:
Fault Status: 10100000
Fault Priority: 2
Fault Frequency: 1
Mileage: 63876 km
Time Indication: 0
Date: 2000.00.00
Time: 16:00:57

Freeze Frame:
RPM: 0 /min
Speed: 0.0 km/h
Voltage: 12.54 V
Pressure: 131 mbar
Pressure: 54 mbar
(no units): 0.0
Temperature: 32.4°C

Readiness: 1 1 0 0 0

Looking at the OBD2 functions of VCDS, I found:

Mode 01 - PID 01 : Readiness -- Address 7E8

Number of DTCs stored: 0 -- MIL Status: MIL OFF
Misfire monitoring: Not installed.
Fuel System: Passed
Comprehensive Components: Passed
Catalyst monitoring: Not installed.
Heated catalyst monitoring: Not installed.
Evaporative system monitoring: Not installed.
Secondary air system monitoring: Not installed.
A/C system refrigerant monitoring: Not installed.
Oxygen sensor monitoring: Failed or Incomplete
Oxygen sensor heater monitoring: Not installed.
Exhaust Gas Recirculation: Failed or Incomplete

My questions are,

1. What do the above scans mean?
2. Do I have a sensor failure that's causing grief or a DPF that is crook?
3. Any recommendations on getting the car working properly? If its a sensor, would that be covered under warranty (I have 27mths extended left)

The car has been regularly serviced (by JMac here in Brisbane) so I don't think poor quality oils are an issue.

I have read the posts about DPF delete, which I don't really want to do, let alone know where to get the work done with decent remap of the ECU.

There was mention in the 'DPF wash out and rebuild' thread by Greg Roles (post 49) about the chemical cleaning . Is that a viable option or shonky like the 'fuel savers' and power chips on ebay.

There is also talk about 'provent' systems as a preventative measure which I also open to fitting.

Is there someone in Brisbane that can do the work? (DPF Clean, rebuild, delete, provent fitting) Any ideas on cost?

Look forward to any advice / recommendations

Thanks for reading

Tom