Hello everyone! My car is Ford Focus C-max 2006 1.6 TDCi 86k miles.

I have P2002 error (only this one), connected FORSCAN and DPF pressure sensor data is very strange. It is 0.0kPa when below 2000 RPMs and grows up to 1.5kPa on 3000 RPM

FORSCAN says:
P2002 - DPF efficency below threshold
Additional sign of malfunction: (:01) - Signal above the maximum threshold.

I also noticed after cleaning of errors, that P2002 appears right after I get 3000 RPMs on 4'th gear and pressure hits 1.5kpa at first time

Is 1.5kPa too high pressure for 3000rpm? 

FORSCAN possible reasons of P2002 and my comments:
1. "DPF might be removed". But looking at exhaust gas, it is very clean. I've seen cars with no DPF, exhaust gas is black and pipe is full of ash while mine is pretty clean. 
2. "DPF pressure sensor hoses might be damaged". I've inspected both hoses. They are clean with no wholes in them.
3. "Air intake blockage".  New air filter installed, no blockage, everything is clean. 

I don't feel any loss of power in my car, only concerned about this P2002 error. 

I thank everyone for any help. 
 

11 hours ago, Sergey B said:

Is 1.5kPa too high pressure for 3000rpm? 

It is not too high and lower than I would expect. 0 kPa below 2000 rpm is not right, even for a brand new car.

I suspect one of the first two reasons that FORScan has given is likely to be correct. You could try the Service Procedure - Reset DPF Learned Values -  or whatever is is called but it may not solve things if the problem still exists.

 

Thank you Tizer. 
I forgot to mention I did Reset DPF Learned Values 600 miles ago. P2002 is still there all the time

I've also measured the pressure of both Post and Pre DPF hoses manually and it is different. The one before DPF shows higher pressure than post-DPF. I suppose that means DPF is still there, isn't it?

DPF pressure sensor hoses are fine, I'm sure 100%. Tested them a few times.  

Can you please take a look at the diagram I've recorded with Forscan. Do you see anything suspicious? 

Thank you

There is nothing in that Live Data that looks suspicious other than the Differential Pressure being too low.

If the DPF is there and no one has drilled a hole through it and the hoses are ok then the Sensor may be reading incorrectly. The best way to check would be to borrow a known working one from another similar car.

Maybe someone in the past has fitted an aftermarket one that is not compatible with that car.

 

Thank you. I took another sensor. The weird thing is that both sensors are stuck on 2kpa when I manually apply pressure to the Pre-DPF hole of the sensor. The pressure goes up on live data diagram until it hits 2kpa where it is stuck. It is stuck until I turn the ignition off and on again. I've tested the signal wire of both sensors and the voltage is being changed from 0.5V on 0kpa to 5.0V on 40kpa. And the voltage of the signal wire never stuck. But when I look through the computer, it is stuck on 2kpa. Can it be some kind of software problem in the ECU? The resistance of both sensors is around 65kOm when I test the signal and + outputs of the sensor. 

On some website, I've read that DPF presence can be tested by putting a clean cloth on the exhaust pipe. I took a clean cloth, put it on the exhaust pipe, and gave some high RPMs and the cloth became darker with black particles. Do you agree this also might be a symptom of drilled or removed DPF?

Let's suppose DPF is really broken. I'm in Ukraine now and I'm not sure I can buy a new one in the next month or two. Before I replace it, how can I prevent this p2002 from appearing? Is there any trick to let the ECU think that DPF is fine? I want the car to stop spending fuel for regeneration during that time. Is it possible?

It looks like the PCM is not Interpreting the readings from the Sensor correctly, maybe the Software is corrupt or a previous owner tried to delete the DPF to hide a fault.

I'm not sure that the DPF removes all Soot from the Exhaust, your one may be Intact and it is normal for a cloth over the Exhaust to get dark.

6 hours ago, Sergey B said:

Is there any trick to let the ECU think that DPF is fine? I want the car to stop spending fuel for regeneration during that time. Is it possible?

I don't know the answer to that question. You should be able to see with FORScan if Regeneration is still happening and how often it happens.

If there is not a PID for Distance Since Last Regeneration then the DPF Temperature will normally increase and the Throttle Valve will past close during Regeneration, depending on the Emissions Level and what version of the Engine Ford fitted to your car.