Hey everyone,
I own a DS3 1.6 BlueHDi 100 (2014), VF7**************[VIN obfuscated, can be read by forum staff].
Engine code: BHY or BH02.
I’ve been getting AdBlue tank errors (low pressure, etc.). I removed the tank, disconnected everything, and found that the AdBlue pump module was flooded with urea solution. The PCB has corrosion on some component pins.
I tried cleaning everything, hoping it would fix the issue, but after reassembling and plugging it back in, I now get error U029E (no communication with NOx system). I suspect there’s a short somewhere on the PCB.
I started looking for a used replacement on eBay and noticed that my PCB has 3 capacitors, while other versions seem to have only 2. After reading more (and checking some forum links), it looks like there are at least 3 different firmware versions of these PCBs. Even if they look the same, they might not work properly with my car’s CAN bus.
So my question is: what is my DS3 compatible with? From what I’ve found, models like C3, C4, and C4 Cactus seem to use a similar system. Is there a good chance it will work if I replace just the AdBlue pump module?
Thanks in advance for any advice!
ds3 1.6BlueHDI adblue compatibility issue
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dimon
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mickthemaverick
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Re: ds3 1.6BlueHDI adblue compatibility issue
Can you check the VIN you have entered as the system is masking it from me and if correct it won't. 
I used to be indecisive, now I'm not so sure!
I used to ride on two wheels, but now I need all four!
I used to ride on two wheels, but now I need all four!
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dimon
- Posts: 4
- Joined: 19 Apr 2026, 18:32
- x 2
Re: ds3 1.6BlueHDI adblue compatibility issue
VF7**************[VIN obfuscated, can be read by forum staff]mickthemaverick wrote: 23 Apr 2026, 19:49 Can you check the VIN you have entered as the system is masking it from me and if correct it won't.![]()
Maybe it is going to be visible now
MOD NOTE
VIN modified in this post and added into the first post.
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mickthemaverick
- Moderating Team
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Re: ds3 1.6BlueHDI adblue compatibility issue
Yes thats better! Unfortunately your car is too new for me but hopefully someone will answer soon, good luck 
I used to be indecisive, now I'm not so sure!
I used to ride on two wheels, but now I need all four!
I used to ride on two wheels, but now I need all four!
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dimon
- Posts: 4
- Joined: 19 Apr 2026, 18:32
- x 2
Re: ds3 1.6BlueHDI adblue compatibility issue
thank you.mickthemaverick wrote: 23 Apr 2026, 20:15 Yes thats better! Unfortunately your car is too new for me but hopefully someone will answer soon, good luck![]()
It seems like I have found one looks like exactly that same.
I will raport after plugin it in
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dimon
- Posts: 4
- Joined: 19 Apr 2026, 18:32
- x 2
Re: ds3 1.6BlueHDI adblue compatibility issue
Solved
I have found adblue module on Car Recycling shop spare parts. Surprisingly Peugeout 308 from 2014 year, 1.6 bhdi has that same module as mine, 3 capacitors on pcb and that same numbers on adblue tank and pump module.
Visually the adblue tank from Citroen c4 cactus 2014 is that same, I presume adblue module as well.
It works, I have just pluged it in and have erased erros and have reseted the settings via Delphi adapter (refiill add blue).
I hope no any worries I will get regarding it.
I have plans to take a tank off somewhere in fall time with upcoming cold for inspection.
I have found adblue module on Car Recycling shop spare parts. Surprisingly Peugeout 308 from 2014 year, 1.6 bhdi has that same module as mine, 3 capacitors on pcb and that same numbers on adblue tank and pump module.
Visually the adblue tank from Citroen c4 cactus 2014 is that same, I presume adblue module as well.
It works, I have just pluged it in and have erased erros and have reseted the settings via Delphi adapter (refiill add blue).
I hope no any worries I will get regarding it.
I have plans to take a tank off somewhere in fall time with upcoming cold for inspection.
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Trickiedickie
- Posts: 47
- Joined: 12 Mar 2018, 10:32
- x 13
Re: ds3 1.6BlueHDI adblue compatibility issue
You made the right call. Well done!