Peugeot 208 BlueHDi 100 5d 2019 – connection for the urea system

[Sponk]

Is it possible to get information about the connections to the urea system, especially around the pump and nozzle? VIN: VF3**************[VIN obfuscated, can be read by forum staff]

Also, if possible: The car did not come with a rear camera, but I have an original one that I want to connect. I don't know if the connection for it is shown on this model. If it is, I would also be grateful for this information.

Thanks in advance!

[mickthemaverick]

Your car is newer than the backup system I have so I'm afraid I can't help, good luck!

[Paul-R]

What is it you're trying to find out about the urea/Adblue system? What problem or error code do you have?

[Sponk]

Your car is newer than the backup system I have so I'm afraid I can't help, good luck!

What do you mean by backup system?

[Sponk]

What is it you're trying to find out about the urea/Adblue system? What problem or error code do you have?

I think you are familiar with the problems the system gives. I can't remember the error codes, but it seems like it isn't injecting urea. The first error appears after about 1000 km and relates to upstream temperature. I think this is because it can't burn off properly, leading to excessive temperatures. The second error, which appears later, indicates a lack of urea.

The reason I'm looking for the connections is:

1. To be able to control the pump and nozzle myself when the battery is disconnected.
2. I'm thinking of installing an indicator (LED) on the nozzle to show whether it is receiving voltage while driving. Even though I test with Diagbox while driving and it says urea is being injected, what the diagbox says and what actually happens may be different. So this is just to test and find out the cause.

I've tried many things, but it keeps showing the error. Sometimes it has used urea, other times it hasn't used any. So could it also be a wiring fault?

[mickthemaverick]

I have access to the Citroen wiring diagrams for pre 2013 cars whixh is the backup system I was referring to

[Sponk]

I have access to the Citroen wiring diagrams for pre 2013 cars whixh is the backup system I was referring to

Yes, in those systems, but on the PSA platform, I think it exists.

[Mihael_M]

There is probably more detailed information on the PSA servicebox site, but there is a fee. The GuiaPSA website has a lot of information about the Adblue system. https://guiapsa.foroactivo.com/f21-acce ... ito-adblue

[Sponk]

There is probably more detailed information on the PSA servicebox site, but there is a fee. The GuiaPSA website has a lot of information about the Adblue system. https://guiapsa.foroactivo.com/f21-acce ... ito-adblue

I've read and searched a lot, apparently a problem worldwide, and yet no one has found the solution.

[Sponk]

Update (wife's vehicle)

I read that this model was supposed to have an additive tank. I checked, and it does NOT have one. There's a fuel filter where the additive tank was supposedly located.

I inspected the injector again and tested its flow rate. It delivers around 50 ml, which is as it should be.

I ran a regeneration again. The first time I ran it, it continued past 100%, which made me think it was a Diagbox error, so I stopped it manually. This time I let it continue, and it ran all the way to 200% before stopping on its own.

I made sure the urea tank was full. After my wife had driven just over 600 km with no errors, I checked the urea level – it had used just over 1 liter. Progress, as it has now started consuming urea again.

I'm thinking that regeneration only needs to be run when problems start to appear – and maybe also clean the injector?

I had bought 1 liter of "Original Peugeot OE number: 1623961680" to be sure I was using the correct product. To assist combustion, I added approximately 1 ml per liter.

[Sponk]

Update

After she drove another 1000 km, the fault P0425 64 appeared again. Since it's impossible to know which illogical temperature triggers the fault, I've always assumed it's due to soot buildup that, during combustion, causes this temperature difference leading to the fault — possibly a clogged catalytic converter? But it could also be an intermittent fault in the sensor itself, so I've ordered a new one. That way I'll find out if that was the issue or if the fault comes back.

I filled up with urea again, and over roughly 1000 km, it had again only used just over a liter.

I thought I'd try running a catalytic converter/DPF replacement procedure to see if it might bring any improvement, but as I've experienced before, version 9.150 gives an error every time. The test starts and runs for a while, then the program reports a communication error, but the car continues at 3000 rpm. Other times I've manually turned off the engine and seen a U1218 81 fault appear, which often needs to be cleared twice before it disappears. But this time I didn't stop the engine, and I noticed that even though the program reported an error and the engine continued at 3000 rpm, after a while it returned to normal on its own, so I'm thinking the "test" might have completed anyway? I'll install a lower version and try again another time.

While I was at it, I thought I'd run a regeneration again, really just to see if it still went to 200%, which it did, but I noticed that this time there was no smoke at all coming out of the exhaust, and the smell was different, indicating that the DPF is now clean enough.

What a strange system they've designed. The car has no additive, urea is only used to neutralize NOx gases, and DPF regeneration happens under optimal conditions while driving.