Barrym028

P2002 fault code help

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Hi I have a 07 220d with 130000 odd on the clock, the car had the DPF  removed a few years back and deleat from the ECU, haven't had any issues with the car in that time but recently I got the check light, checked with techstream and had the falut code p2002 diesel particulate filter below threshold bank1, after checking the numbers on the computer I checked both pipes to the differential pressure sensor, both where clear so I assumed that the sensor it's self was faulty. Replaced the sensor but got the same reading on techstream, tried disconnecting the sensor completely and checking techstream again and I'm still getting the same reading with it not connected!

My next thing to do is check the wires to the sensor but I'm not sure what reading I sould expect as I can't find any clear info .

The picture below shows the reading I'm getting regardless of witch sensor(New or old) and the same when it's not connected at all

Any help would be greatly appreciated , thanks in advance 

20171019_214058.jpg

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This is what the manual has to say about the differential pressure:

Untitled.thumb.jpg.c5bccf40d8df3bfbe80f05eed9619991.jpg

 

I hope this sheds some light on the problem for you.

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Thanks for the above info it dose help, but would anyone know what value I should expect if I was to test the 3 wires going to the sensor I.e. live=volts signal= range/volts 

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I forgot to mention the reason I think it may be a faulty wire is that the code is permanently there , it returns instantly after clearing it and the sensor readings i get don't change even  when it is disconnected, my thinking is that these numbers are default values applied by the ECU when the sensor fails(similar to what some car do when the MAF iis disconnected)

I may be wrong so if anyone has a better understanding or knowledge id only be too glad to here your opinion 

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This is the test to determine if the sensor is working properly or not:

Untitled.thumb.jpg.1b70b360716e34ca6b67fecd273a0d65.jpg

 

Although, as you can see, it is tricky because you need to apply air pressure to test the values.

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Thank you this is exactly what I needed hopfuly I'll get a chance to test it over the weekend.

I'll let you know how I get on with the tesing

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Hi just finished checking the sensor and wires bothe seem fine no resistance from the wires to the ECU, also the sensors is functional as I back probed it and got the correct voltage at roughly the stated pressures, the ecu is also reading it.

I've included a few pictures of techstream live data maybe someone can understand or see if I'm missing something,

20171028_172626.jpg

20171028_172640.jpg

20171028_172643.jpg

20171028_172654.jpg

20171028_172708.jpg

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Have you taken the hoses off the sensor recently?

The reason I ask is that the manual states that a negative pressure reading suggests the pipes have been fitted backwards.

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Actually, scratch that.  I just checked the manual again and it says the pressure at 3000rpm indicates the pipes are wrong, which is obviously not the case here.

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Well, the obvious one is the DPF Thermal Deteriorated.  I am not actually sure what that means.

If you want to compare some figures, you can have a look at this thread:

You're pressures are low, but then surely they should be considering there isn't a DPF in there.  In fact, this is one of the reasons why I thought the car would have difficulty if you removed it, so the fact that you say it has worked fine for a few years is odd.

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14 hours ago, Shahpor said:

Well, the obvious one is the DPF Thermal Deteriorated.  I am not actually sure what that means.

If you want to compare some figures, you can have a look at this thread:

You're pressures are low, but then surely they should be considering there isn't a DPF in there.  In fact, this is one of the reasons why I thought the car would have difficulty if you removed it, so the fact that you say it has worked fine for a few years is odd.

The dpf was removed and the ecu mapped, I assumed that the map was so that the car wouldn't try to regen 5th injector was removed. The car has drove and still drive's as good as a 220 Could, no other faults at all, fuel economy seems to be on par with the majority (34ish mpg short runs mainly)

Only ever get a puff of smoke on a cold morning when the car is started initially and not the rest of the day. not using any oil or water

I wouldn't care about the fault code but I can't get past the next mot with the dash lit up like a xmas tree

 

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16 hours ago, Shahpor said:

Well, the obvious one is the DPF Thermal Deteriorated.  I am not actually sure what that means.

If you want to compare some figures, you can have a look at this thread:

You're pressures are low, but then surely they should be considering there isn't a DPF in there.  In fact, this is one of the reasons why I thought the car would have difficulty if you removed it, so the fact that you say it has worked fine for a few years is odd.

Hit the nail on the head, the ecu obviously has a predetermined number of regens that the DPF can go thought b4 it's needs replacing, even though the DPF has been removed the ecu must think it's still there and thinks it hit the magic number of regens, all I had to do was go into the settings on techstream and clear the thermal data, exactly what u would do if u replaced the DPF 

Thanks for the input and assistance 

Very much appreciated 

And I hope this tread helps someone else 

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24 minutes ago, Shahpor said:

So the error code has been cleared?

Code gone, she's got a clean bill of heath

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Cool, good result. :smile:

It is not something I have come across before, so I agree this might be useful information in the future.

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Good info to know.  Does anyone have a link to TS sw for IS220d?  Mine has petrol only options - US ver?

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