Technical Ducato P0401 P0402 P0236 P0238 and limp mode its 2017 Euro 6, EGR changed, What do I check next

[Fredastaire]

There is an LP EGR valve for our van on ebay..that's where you can see the butterfly valve.
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If we found a way to disconnect the bottom pipe, blank off the silencer outlet and pipe in fresh air then yes the combustion temp will be higher. The input of dirty air is designed to make combustion a lower temp so 'no' is lowered or stopped.
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When you run MES you can watch the EGRs individually turning there function on or off, with a cold engine it's off anyway.

 

[Fredastaire]

If we found a way of disabling the LP EGR do note that the HP EGR would still be functioning to I guess we would still be controlling emissions, maybe to euro 5 standards.

 

[jansla]

It would be very very interrsting to be able to identify those 5 wires that connect LP.EGR to ECU, it would open some possibilities for testing or maybe even some modifications….

 

[jansla]

it may be possible to have one more (third) egr hanging there under the bonnet just to give the ecu something to play with, as it is possible to drive the car which is euro5

 

[theGman]

Does anybody have a link to the Fiat technical bulletin 10.023.19? When I called my Fiat Professional garage they said there was an additional code came up afetr changing MAP sensor and that they needed to contact Fiat Italy, When I went to collect my motorhome after they said it was fixed I asked them what the problem was, they said they weren't able to discuss that?

 

[theoneandonly]

Does anybody have a link to the Fiat technical bulletin 10.023.19? When I called my Fiat Professional garage they said there was an additional code came up afetr changing MAP sensor and that they needed to contact Fiat Italy, When I went to collect my motorhome after they said it was fixed I asked them what the problem was, they said they weren't able to discuss that?

Its in this thread somewhere

 

[theGman]

Ok guys, just got the MES Bluetooth adaptor. But every time I try to connect the connection just drops? Any ideas?

 

[CheeseMonster]

Ok guys, just got the MES Bluetooth adaptor. But every time I try to connect the connection just drops? Any ideas?

I can't help but would suggest ringing Gendan if you bought it from them. I've found them very helpful talking through issues.

 

[theoneandonly]

Multiecuscan - Diagnostics software for Italian cars

download the user guide.
Any problems pairing the pc to the obd device
then next problem can be seeting up the windows usb settings
in mes setup F9
select the device and test
follow screen. the setting in 1 are mine foer a vgate device if the obdlink ones dont work try alternative.

 

[theGman]

Multiecuscan - Diagnostics software for Italian cars

download the user guide.
Any problems pairing the pc to the obd device
then next problem can be seeting up the windows usb settings
in mes setup F9
select the device and test
follow screen. the setting in 1 are mine foer a vgate device if the obdlink ones dont work try alternative.View attachment 429766View attachment 429767

That's great. I managed to get it to work, I'm on my sons laptop and it needed so many updates. I've taken my motorhome for a drive and got it to go into limp mode again. You can see the sudden drop in the graph. Any ideas?

 

[theGman]

@CheeseMonster I was too eager to get the tests done, I was using my sons laptop, as mine is apple, and it needed sooooooo many updates. After I done all the updates it worked fine.

 

[theoneandonly]

have you got the screen shot from F2
also the page F3 errors and freeze frame data from each of the errors .
three graphs
the injector variances are above the fiat limit of +-2
theis is seen on a number of engines
the sum of variances also can be above the limmit.This is the worst ive seen.

LPEGR cooler temperature is low and indicative of a blocked cooler
the valve does not wildly open and close and also includes areas of control ie openings of 1 and 2

The boost pressure is unable to follow the desired value. The turbo is switched off and MIL at the highest boost typical with engines with blocked egr cooler

A few question have you now got a P0401 with or without the 236, 238
is it a comformatic.
I suggest you read my guides

Search results for query: *

www.fiatforum.com

You now have the service notes?

 

[theGman]

Multiecuscan - Diagnostics software for Italian cars

download the user guide.
Any problems pairing the pc to the obd device
then next problem can be seeting up the windows usb settings
in mes setup F9
select the device and test
follow screen. the setting in 1 are mine foer a vgate device if the obdlink ones dont work try alternative.View attachment 429766View attachment 429767

have you got the screen shot from F2
also the page F3 errors and freeze frame data from each of the errors .
three graphs
the injector variances are above the fiat limit of +-2
theis is seen on a number of engines
the sum of variances also can be above the limmit.This is the worst ive seen.
View attachment 429773
LPEGR cooler temperature is low and indicative of a blocked cooler
the valve does not wildly open and close and also includes areas of control ie openings of 1 and 2
View attachment 429774

The boost pressure is unable to follow the desired value. The turbo is switched off and MIL at the highest boost typical with engines with blocked egr cooler


View attachment 429772

A few question have you now got a P0401 with or without the 236, 238
is it a comformatic.
I suggest you read my guides

Search results for query: *

www.fiatforum.com

You now have the service notes?

@theoneandonly , I don't have a P0401 error, tonight I got P0238-61 and P0263-7A. I had injectors, engine and turbo replaced December 2021

 

[Fredastaire]

Can I suggest basic question - wipe the inside of the silencer tailpipe. If it's well sooty it indicates cracked DPF, if it's almost clean then that's a good start. If it's sooty, wipe it spotless, go do a drive then repeat. When we know how clean it is @theoneandonly will give a clearer direction of what's next.

 

[theoneandonly]

if you dont use the ini file i sent then attached are 3 template screen shots sent in 2 parts a,b
2 is specificaly aimed at the injectors
5 general
7 sensors

t2a

t2b

t7a

t7b

t5a

t5b

PS FREDASTAIRES ref to wiping out the exhaust pipe is very important.

 

[Fredastaire]

May I add to the above.
The screenshots are with Multiecuscan (MES) in its playing test mode which they call 'simulate'
whilst all the parameter script is correct, the values in column showing percentages or mm or mbar are complete fictional so don't think to compare against real values that your van will produce when connected and running. The simulate mode is just for you to play and learn.
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These templates are the very ones that @theoneandonly and I use and share the results between us and have been used to identify members problems, mine included.
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The exhaust wipe out is a critical start position for knowledge of any of our problems.

 

[theGman]

Can I suggest basic question - wipe the inside of the silencer tailpipe. If it's well sooty it indicates cracked DPF, if it's almost clean then that's a good start. If it's sooty, wipe it spotless, go do a drive then repeat. When we know how clean it is @theoneandonly will give a clearer direction of what's next.

 

[theGman]

Hi I’ve just wiped the exhaust as recommended, to me the exhaust is very clean. Picture attached.

 

[theGman]

@theoneandonly , I don't have a P0401 error, tonight I got P0238-61 and P0263-7A. I had injectors, engine and turbo replaced December 2021

Hi @theoneandonly is it possible to recall freeze frame data or does it need done when error occurs?

@theoneandonly , I don't have a P0401 error, tonight I got P0238-61 and P0263-7A. I had injectors, engine and turbo replaced December 2021

This is details from F2

 

[Fredastaire]

@theGman with a clean exhaust it's highly unlikely that you have a duff DPF. What is the van mileage, what is the replacement engine mileage? .
Back to basics I recommend an intensive viewing of the intercooler hoses and the intercooler itself, take the air cleaner cap off and check the air filter for rodent nesting. Check the turbo solenoid plastic vacuum pipes.
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If all ok I would next go for a run with MES running live data and watch the LP EGR opening requested / actual. Downhill foot off it should be closed, foot dowñ it should re-open. On the run you should see it fluctuating between say 2mm and 3.9mm to show it is varying itself to suit engine demand, the LP EGR temperature should equally vary between 60 ish closed and 100 +-10 as you drive. This indicates a clear enough cooler. If you see it either closed or 4.7 open (ie fluctuating between closed or fully open), then the cooler looks blocked.
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If this proves ok then no hesitation change the turbo solenoid and MAP sensor, cost circa £100 and a little diy work.