Urea fault, engine repair needed

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LedZep
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Urea fault, engine repair needed

Unread post by LedZep »

Hi, again..
I thought i've done with ad blue nonsense at the moment, but not. Returning today at the highway, after 180 km trip, engine fault came up and urea fault after a while preventing starting after 1100 km. Car was driving excellent, no other signs that something was really wrong. The only that i did before fault come up, was to energize after a long time the head up display which was struggling to open.I did the "boot" procedure by hand to help it and everything o.k. Don't know if it is related with some electric circuit, safe e.t.c. But the real problem is that when i connect diagbox, it seems that can't communicate easily with the ECU and do a global search for faults.I did a reset disconnecting the battery (not the normal procedure, just a quick with locking the car, sleep mode and connecting battery again) and it did communicate 1 time with BSI with 1 warning B 1808 87.
The procedure of global search was very slow compared with other times and with the other components just saying "no dialogue". Obviously hate each other. The only that i did 1000 km ago was an inspection and clean of adblue injector and it was all fine until now. Also i did a reset in adblue tank when i top up the reservoir many miles ago. Don't know maybe ECU is get locked when this urea fault appears. Any ideas?
Last edited by LedZep on 26 Jan 2025, 22:07, edited 2 times in total.
Steve Walsh
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Re: Urea fault, engine repair needed

Unread post by Steve Walsh »

Needs code reading properly but an educated guess on urea fault, replace adblue injector, then tell ecu you have done it
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LedZep
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Re: Urea fault, engine repair needed

Unread post by LedZep »

Steve Walsh wrote: 26 Jan 2025, 22:01 Needs code reading properly but an educated guess on urea fault, replace adblue injector, then tell ecu you have done it
Yes. ok but i have to connect to ECU to tell all these nice things and i can't. I'll give it a try tomorrow when i'll find time i hope as i'm really busy and clear mind.
Steve Walsh
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Re: Urea fault, engine repair needed

Unread post by Steve Walsh »

Mke sure you have good obd connection, and also try a different USB port on computer. When I use mine I put the laptop on a solid surface and dont move it as this can cause either end of the lead to disconnect long enough to upset it
Thanx to Marc and all the admins & knowledgeable people that make this the best forum on the interweb. =D> =D> =D>
LedZep
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Re: Urea fault, engine repair needed

Unread post by LedZep »

Steve Walsh wrote: 27 Jan 2025, 08:11 Mke sure you have good obd connection, and also try a different USB port on computer. When I use mine I put the laptop on a solid surface and dont move it as this can cause either end of the lead to disconnect long enough to upset it
Problem solved.OBD connection, i mean.. Unfortunately Diagbox 9.186 VMWARE disappoint me. Couldn't establish connection to PSA interface for some reason.Tried the 9.91 ver. and everything was flawless with these results. The adblue nightmare, where you have to sell your kidney in black market for a refurbished tank..
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LedZep
Donor 2024
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Re: Urea fault, engine repair needed

Unread post by LedZep »

Update.
The usb connection cable was defect. That's why there was no communication with ECU.So there is no problem with Diagbox 9.168. I had a spare one cable and everything is o.k. Also seems that UREA injector is faulty even if i made a good clean and inspection with poly meter readings and applied 12 volts to energize it and everything was in specs. I did a test with diagbox and it was not "buzzing" so i suspect something is wrong with injector. I'll check the connection plug, because it was really difficult to reach and maybe is not connected properly.Otherwise i'll change it and see how it goes after resetting the parameters of depollution system and new injector fitted. From diagnostic form is obvious a blockage with P208E error. But pump is working with 5 - 6 bar so it seems there nothing wrong hopefully with the tank itself. In first chance i'll change the injector as i had already ordered it last time i saw crystallization around gasket.
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RichardW
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Re: Urea fault, engine repair needed

Unread post by RichardW »

Certainly looks like a fault with the injector - it could just be that it is blocked, easy enough to whip out and have a look.
Richard W
LedZep
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Re: Urea fault, engine repair needed

Unread post by LedZep »

Dead as a dodo.
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Ohms was exactly right, 12.7, but no clicking. Replaced with a new one which is "buzzing" under injector test in Diagbox 9.168 ver. which with i'm very pleased. I've done under Diagbox realisation of Nox sensor, new urea injector fitted and filling of urea reservoir and added and Wynn's treatment.In next "coughing" from adblue sytem, i'll throw it to the garbage. I swear..