Depollution System Warning Lights Up

[paul.h]

Removing the dpf does not seem to involve much:

- the air con compressor may need moving to one side and suspending. If there is an engine undershield this may need removing.

- remove the heat shield, undo the pressure tapping from the dpf, note the relative position of the dpf to the catalyst (possibly mark them with tippex/paint/marker pen), undo the clamp holding the exhaust to the dpf outlet pipe, undo the large clamp holding the dpf to the catalyst and then lower the dpf down from the catalyst.

- to refit it the dpf needs to be lined up to the catalyst (a groove on each is lined up), the clamp around it fastened, the exhaust fastened back (a U shaped positioning shim is shown put on the join to line up the exhaust and dpf before the large clamp is tightened), the pressure tapping fastened and then the heat shield put back. A check is made for leaks.

 

The OBD 16 pin diagnostic plug on the car is located under the heating panel behind the console ash tray which needs pulling out. When you plug a diagnostic tool in, do it with the key out of the ignition, wait for the tool to start up and it will say it is not connected or something similar, then put the key in the ignition and turn it so the dash lights up, then wait for the tool to start up again, read any fault codes and descriptions given and write them down. If the tool can give freeze frame data also look at this since it will give values when the fault occurred which may be of use and you can also write these down. At this point you can delete the fault code - the tool should give instructions on how to do this but it is always done with the dash lit up but the engine not running. You can run the engine once the tool has said the codes are deleted. Switch off the engine and remove the key before you unplug the tool.

[arak81]

I followed your advice but couldnt get ELM OBDII tool work with my laptop (windows8)..anyway, i will return it.

[paul.h]

Pity about the code reader.

 

When you have the dpf replaced, I would keep the old one and in the future you might clean it if you ever get access to a jet wash. Then you have a spare.

[arak81]

depollution system error mmessage showed up again as i went to motorway tonight… i got my expert friend to drive my car and raise the speed as much as he can. The speed rose up to 85mph for few minutes and automatically slowed down with stop sign flushing on the disply for few times. Car slowly stopped and didnt move at all until restarted.. We did couple of more times and same thing happen every time.

 

So does it mean that dpf getting blocked or could there be any other cause for this symptom?

[arak81]

Hi paul.h I am expecting your expert opinion. Please other guys can shade some lights on here as well.

[paul.h]

From your other post about the filler cap sensor fault, it could be this is preventing the eolys fluid being dosed and hence the cause of the dpf blocking. So I would have the sensor fixed before doing anything to the dpf.

 

Unfortunately the other moderators are not available to help with the forum for quite some time and other members rarely offer any help, possibly due to a lack of knowledge or time.