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Read more →Peugeot, Citroen and Vauxhall AdBlue tank faults
If your Peugeot, Citroen, DS or Vauxhall diesel says "Starting impossible in" a number of miles, check the AdBlue tank early: on these vehicles it holds the pump, heater and sensors. Some vehicles built from January 2014 to August 2020 can still get a Stellantis contribution towards the tank, so ask a franchised dealer first. If you are not covered, we find the fault, fit the right part and initialise it properly.
Have your reg, the exact dash message and any fault codes to hand. We'll tell you on the call what it's likely to be and what happens next.
The short answer
- What has failed
- The tank houses the pump, the heater and the level and temperature sensing. A fault in any of them can start the countdown.
- Check your cover first
- Stellantis contributes to tank repairs on some vehicles built 2014 to 2020 that are still under 8 years old, through franchised dealers only. Ask before you pay anyone, including us.
- Don't run it to zero
- At zero the vehicle will not restart once switched off. A top-up only helps if the level was the problem.
- What we do
- Find the actual fault, fit the correct part, initialise the system and check it on the road.
Which vehicles this page covers
Peugeot, Citroen and DS diesels badged BlueHDi, the Vauxhalls that share their engines, and vans built on the same Stellantis platforms.
On all of them the AdBlue tank is an assembly, not just a container. The pump, the heater that stops the fluid freezing, the level and temperature sensing and the electronics that control them are built into it.
- Peugeot and Citroen cars and vans, including the Partner, Rifter, Expert, Boxer, Berlingo, Dispatch and Relay
- DS models with BlueHDi diesel engines
- Vauxhalls with Peugeot and Citroen engines: the Vivaro from 2019, the Combo from 2018, the Grandland X and Crossland X diesels, and later Stellantis-platform diesels
- Toyota Proace and Proace City, and Fiat Scudo and Doblo vans from 2022, which share the same platforms and engine families
Not every Vauxhall diesel is in this family. Earlier models developed with GM, Renault or Fiat, including the Vivaro before 2019 and the Combo before 2018, use different engines and AdBlue hardware. Tell us the reg and we will check which system you have.
Signs the tank assembly is at fault
These vehicles warn you with a message as well as a lamp. The wording varies by model and year, but expect one or more of these:
- "Starting impossible in X miles" (kilometres on some vehicles), with a figure that counts down as you drive
- A UREA or AdBlue warning lamp, often with the engine management or Service light
- An "Emissions fault" or "AdBlue fault" message that stays after a top-up
- The AdBlue warning showing low or empty when you know the tank has fluid in it
- Warnings that appear in cold weather or after the vehicle has stood for a while
Top up first, because a low level starts the same countdown. If the message is still there after a few restarts and a short drive, treat it as a fault. Clearing it with a code reader fixes nothing: the fault returns and so does the countdown.
Fault codes linked to the tank
These generic codes, in SAE J2012 wording, point towards the tank assembly or its wiring. Dealer software shows Stellantis descriptions, which can read differently, and one failure often sets several codes at once.
- P20E8, Reductant Pressure Too Low: the pump is not building pressure, or the pressure is leaking away
- P20E9, Reductant Pressure Too High: check the line and dosing injector for a blockage before blaming the tank
- P208A, Reductant Pump "A" Control Circuit/Open
- P20B9, Reductant Heater "A" Control Circuit/Open
- P203B, Reductant Level Sensor "A" Circuit Range/Performance
- P205B, Reductant Tank Temperature Sensor "A" Circuit Range/Performance
- A lost-communication fault with the AdBlue electronics: the tank itself, its power supply or the wiring
P20EE (SCR efficiency) and P204F (reductant system performance) can follow a tank fault, but both have causes well away from the tank. Read our guides to those codes before anyone orders a tank.
Why the whole tank is usually replaced
Because the pump, heater and sensors are built in, a failure in one of them normally means fitting a complete tank assembly rather than just the pump or heater.
Diagnose before you buy, though. A faulty heated AdBlue line, a blocked injector, a wiring fault or a failing NOx sensor can bring up similar warnings, and a tank fitted on a guess leaves you with the same countdown.
Used tanks are the same design as the one that failed, often a similar age, and they still need initialising.
Removing or emulating the system to stop the countdown is not a repair. The MOT fails emission control equipment that is missing or obviously modified, and the government has proposed making it an offence to use any road vehicle from 2001 onwards altered that way. We repair the system instead.
Check the Stellantis cover before you pay anyone
Stellantis runs a voluntary programme that contributes to urea tank repairs on some Citroen, DS, Opel/Vauxhall and Peugeot Euro 6 diesels with SCR.
Age is the catch now. Vehicles built before about October 2018 are past eight years old, and even the last ones built in August 2020 are past five. If you still qualify, expect a share of the parts cost rather than a free tank, with the dealer confirming the exact share. The Peugeot and DS UK owner pages set out these terms:
- Vehicles built between January 2014 and August 2020
- Up to 8 years old or 130,000 miles, whichever comes first
- Under 5 years old and up to 94,000 miles: parts paid in full
- 5 to 8 years old: between 30 and 90 per cent of parts, depending on mileage, plus a contribution towards labour
- Repairs carried out by an authorised dealer, with servicing to the manufacturer's schedule among the conditions
- Conditions stated as valid until August 2028
- 1
Get your details together
Your VIN (on the V5C), the mileage and your service history.
- 2
Ask a franchised dealer for your make
Ask whether the urea tank (AdBlue) special coverage applies to your car or van, and what share of the cost it would cover. The published terms do not list models, so only the dealer can confirm it.
- 3
Not covered? Call us
If the dealer says no, call with your reg and the dash message. If you ring us first, we ask your build date and mileage and tell you honestly if you look covered.
Paid an authorised dealer for a tank between January 2021 and December 2023? Ask Stellantis customer support whether you can claim extra.
What a proper tank repair involves
The job is finished when the system has been initialised and proven on the road, not when the new tank is bolted in.
- 1
Check the level and the fluid
Confirm the tank holds enough of the right fluid. Diesel or water in the AdBlue changes the job completely.
- 2
Read codes and live data
Read the SCR faults and look at live AdBlue pressure, temperature and level to see which part has failed.
- 3
Rule out the rest
Test the wiring, power supply, heated line and injector, and check the NOx sensor readings, before condemning the tank.
- 4
Fit the correct tank
Match the part to the VIN. Tanks differ between models, engines and build dates.
- 5
Initialise the system
Run the tank replacement procedure with diagnostic equipment that supports it, so the system is primed and reset and the countdown cleared. Some tanks also need a software update.
- 6
Prove it on the road
Drive the vehicle, then recheck pressure and fault memory before handing it back.
Some software updates need an online connection to the manufacturer's systems. If any step on your vehicle needs dealer-only access, we tell you before any work is booked.
What affects the cost
- Whether manufacturer cover applies to your vehicle
- Whether the fault is in the tank assembly or in the wiring, heated line, injector or NOx sensor
- The exact tank for your model, engine and build date
- Whether the tank needs a software update as well as initialisation
- Whether the AdBlue is contaminated and the lines need flushing
- Where the vehicle is and where the work can be done
We don't put AdBlue repair prices online because the same warning can mean very different repairs. Call with your reg and the warning message and we'll quote for your vehicle. How we quote
Who comes out
In Devon, our own technicians from the Totnes workshop. Outside Devon, we book a vetted independent technician near you where we have one.
Either way you deal with us: we quote, take payment and look after anything afterwards. Call and we'll tell you straight away whether we can get someone to you.
We repair. We don't delete.
We find the actual fault and fix it, so the vehicle stays road-legal and passes its MOT. We don't remove, disable or emulate AdBlue systems.
What customers say
Genuine Google feedback on our AdBlue, SCR and diagnostic work.
Google Review
Very impressed with the professional service offered. They diagnosed and sorted the adblue issues on my car, explained the process well and I believe the price was very reasonable. I would highly recommend them.
SD
sara dixon
AdBlue
Google Review
I took my VW Golf diesel to AutoClean after it went into limp mode with a flashing glow-plug light and suspected DPF blockage. Tom carried out proper diagnostics and confirmed the DPF itself was healthy. Instead of replacing parts unnecessarily, they identified a faulty DPF differential pressure sensor as the root cause. The issue was explained clearly, the costs were transparent, and the repair was completed promptly. Limp mode resolved immediately and no further work was pushed. I appreciated that they didn't default to a costly DPF removal when it wasn't needed. Good diagnostics, straightforward communication, and a proportionate fix. Would recommend if you're dealing with DPF or emissions-related issues.
MA
Martin Amis
DPF Diagnostics
Google Review
Very professional and incredibly helpful services from Tom at Auto-Cleanse, walked me through the findings on the diagnostic tool and thankfully didn't need a DPF clean! Excellent piece of mind and whilst I hope I don't need their services again (!) I will be recommending them to everyone!
CW
Callum Woodman
DPF Diagnostics
Frequently Asked Questions
That figure is the distance left before the system blocks a restart, and it falls as you drive. Use it to get the fault diagnosed, because at zero the vehicle will not start again once switched off.
If the level was not the cause, a top-up will not clear it. Give it a few restarts and a short drive; if the message stays, a part has failed and needs diagnosing.
It may be if it was built between January 2014 and August 2020 and is still under 8 years old and 130,000 miles. Only a franchised dealer can confirm it from your VIN, and the contribution only applies to work they carry out.
If you look covered, go to the dealer first; we will tell you that honestly when you call. If you are not covered, call with your reg and the dash message and we will quote for the repair.
Yes. It has to be initialised with diagnostic equipment that supports the procedure, and some tanks also need a software update. Without that step the warning can carry on with a new tank fitted.
The Proace and Proace City are built on Stellantis platforms with the same engine families and can show the same "Starting impossible" message. Toyota is not named in the Stellantis tank programme, so ask a Toyota dealer about any cover.
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Ring with your reg and the warning message. We'll tell you what it's likely to be, who'd come out and what happens next.
Sources
- Stellantis - Urea tank (AdBlue) compensation platform and voluntary coverage terms
- Peugeot UK - Urea tank (AdBlue) special coverage owner page
- DS Automobiles UK - Urea tank (AdBlue) warranty extension owner page
- Italian Competition Authority (AGCM) - case PS12483, Peugeot and Citroen urea tank coverage commitments
- SAE International - J2012 diagnostic trouble code definitions
- DVSA - MOT inspection manual for cars and passenger vehicles, section 8.2.2
Last reviewed 13 October 2026.