Help Required For Removing Software Dpf File From My Ecu

[coastline taxis]

Check your air/vacum pipes goose

[TheGoose]

I'm thinking of buying a new swirl diaphragm, as from what I can see of my pipes they all "seem" ok.  The car has a pattern, if I drive normally it tends to be ok, but whenever I put my foot down harder the error will pop up and often limp mode.  Sometimes constant, or sometimes for a few seconds and then it will disappear, although the error stays until a few cycles of the ignition.  Could the Mass Airflow Sensor also cause problems like this?  Or if that had failed would it more likely be a constant error/limp mode situation?

[paul.h]

When the car is started the diaphragm rod should move so something to check before replacing it.

 

The following is from Citroen's procedure for checking the turbo pressure including fitting a pressure gauge to check the pressure sensor value so you could see what pressures you are getting against expected:

Start the engine.

Engage the 1st gear ratio, and start the vehicle.

Engage the gears up to 3rd gear.

Decelerate to an engine speed of 1500 rpm.

Gradually accelerate , The pressure should be the following :

• 1,1 ± 0,05 bars at 2000 rpm
• 1,2 ± 0,05 bars at 3000 rpm