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

[Masztiff]

So the injectors has change to brand new and the out of spec with new injectors ?
I dont know what cause to the injectors out of spec.The chip tune was very good thing because the car amazing power and driveable so good.Any log with injector voltages ?

 

[Baz in Kent]

So the injectors has change to brand new and the out of spec with new injectors ?
I dont know what cause to the injectors out of spec.The chip tune was very good thing because the car amazing power and driveable so good.Any log with injector voltages ?

Yes, changed injectors (reconditioned?) still out of spec, I have plenty of data logs.
Was the chip tune a power remap?

 

[Masztiff]

Yes, changed injectors (reconditioned?) still out of spec, I have plenty of data logs.
Was the chip tune a power remap?

Yes.Egr software off.The two egr closed every time.Then make remap.He told to me turbo boost still original just the injection and some changes make..The car now fast as Siberian Tiger.

 

[Baz in Kent]

Yes.Egr software off.The two egr closed every time.Then make remap.He told to me turbo boost still original just the injection and some changes make..The car now fast as Siberian Tiger.

Ah ok, don’t think that would pass UK annual inspection (MoT test).

 

[Masztiff]

Ah ok, don’t think that would pass UK annual inspection (MoT test).

The Mot ok.If didnt off the dpf just egr the MOT is Ok.

 

[Baz in Kent]

The Mot ok.If didnt off the dpf just egr the MOT is Ok.

Emissions levels ok?

 

[Masztiff]

Yes

 

[Baz in Kent]

Yes

So what’s the point of EGR valves if they aren’t necessary to pass the MoT test? Anyone?

 

[jackwhoo]

So what’s the point of EGR valves if they aren’t necessary to pass the MoT test? Anyone?

Currently In the UK the mot emmisions test equipment is not capable of measuring the gasses that the EGR system is intended to reduce.

 

[LandyAndy]

So what’s the point of EGR valves if they aren’t necessary to pass the MoT test? Anyone?

To ruin your engine, and make you spend money.

That’s what my egr has caused. And much pain.

my inlet and all the crap from an egr.

 

[Fredastaire]

@LandyAndy is that Ducato in the photo? On the basis of yes, what year/model?

 

[Baz in Kent]

Ok, so we should remove the EGR valves from the ECU without risking MoT test failure?

 

[LandyAndy]

@LandyAndy is that Ducato in the photo? On the basis of yes, what year/model?

It is a 2009 Ducato with 32thou miles / 51thou km. It has never had any warning lights, shows now codes on a basic reader, and just showed “MAF compensate at idle”
A bit sluggish on high speed hills, black smoke on acceleration with high temperatures, some white / grey smoke occasionally after start up. Ran and ticked over ok and I would never have thought it to run so well with EGR stuck open. It killed my turbo, but caught it in time or could have been much worse.
My EGR is now fully blanked off with metal plate, and am getting it blanked in the MAP on ecu. Have spoken to tuner who will do EGR remove plus a mild MAP for £250.
Interesting now playing with the engine now with EGR blanked, or seeing what the van drives/runs like if it was a stuck shut EGR scenario. Very different symptoms
Been a lot of learning for me on this.

 

[Masztiff]

To ruin your engine, and make you spend money.

That’s what my egr has caused. And much pain.

View attachment 411486
my inlet and all the crap from an egr.

Ok, so we should remove the EGR valves from the ECU without risking MoT test failure?

Yes we go with these car in many Europe Countries

 

[LandyAndy]

Ok, so we should remove the EGR valves from the ECU without risking MoT test failure?

You can’t just “remove the EGR valve”.

IF your EGR is working, it should be closed, so you can just get it removed in the ECU map, by a tuner. But that only is an IF you 100% know it is shut.
If it is stuck open or you don’t 100% know it is closed then you need to physically blank the EGR pipe where it joins onto the exhaust manifold, then get the EGR removed on map.
To stop the EGR system operating you can unplug the Vacuum solenoid and that will bring dash warning light on, but it will only really work IF EGR isn’t stuck in the ope position.
If you just remove the Vac pipes but leave all else the EGR can’t work, but the ECU will still operate the throttle body and close off your clean air intake from the intercooler and turbo.

Hope that makes some sense.

 

[Masztiff]

Yes.if neccessary must closed the egr with plate but mine till today working good whitout metal plate.Mes Write if i log the egrs Valve: Open: 0012 mm maximum
The big question why and what cause the egr cooler shoot up fully on 40.000 km engine.

 

[LandyAndy]

Yes.if neccessary must closed the egr with plate but mine till today working good whitout metal plate.Mes Write if i log the egrs Valve: Open: 0012 mm maximum

On my van the system is dumb, so it doesn’t KNOW if the EGR is open or not. It assumes the EGR is open when it activates the vac solenoid but has know way of know if the EGR has ACTUALLY moved, or if it was already open. There is no sensor on the EGR it’s self.

 

[Fredastaire]

For people reading recent notes, the Ducato of LandyAndy is not the model type referred to in this post title. The Ducatos under discussion are very specifically the Euro 6 built 2016 2017 2018 and are radically different to earlier models. Our Euro6 models defined here have two EGR systems, one the LP takes exhaust after the DPF / catalytic converter, the HP takes direct from the exhaust manifold. Both EGRs have positional feedback loops so in most cases you know where they are on opening in mm.
Sorry LandyAndy but those of us with these variants are in a different league. You also cannot go around fitting blanking plates as the ecu just throws wobblers because it cannot compensate for airflows.

 

[LandyAndy]

Sorry. Hopefully the post can be removed.

 

[Fredastaire]

@LandyAndy theres no way to remove your notes, it really serves for other readers in the future to be aware that those of us with these specific Euro 6 variants that they cannot be confused with earlier, or even later variants. We have an ongoing set of problems created by Fiat when they launched this twin EGR variant, there was something wrong in the software that causes the injectors to overfuel and in certain cases wreckage accumilated can cost £7-10 thousand to repair, noting I say repair and not cure. Together we are not sure that the problem has gone away, it may come back and bite again. Maybe it may serve to avoid these variants if you decide to change for a later year Ducato in future times.
Technically by the way both our EGRs are servo motor driven, not vacuum as earlier vans.