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Peugeot Citroen - Supplement AdBlue in the PSA group control UREA

glapsson 455427 188
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Usually you need to vent the AdBlue tank by unscrewing the filler cap, then clear/reset the AdBlue errors in DiagBox/Lexia; several users report that a defective cap can prevent the system from seeing the refill [#18016057][#18266726] If the warning comes back after a short drive, the refill itself is not the real fault — the thread points to low pressure, pump/tank controller issues, a bad pressure sensor, injector problems, or wiring/contacts [#19019093][#19480902] In a few cases, the fix was not a whole tank replacement but repair of the tank electronics/controller or varistor, with one Warsaw service repairing it for about PLN 1,000–1,500 instead of replacing the complete tank [#19080727][#19165279] Other users did have to replace the complete tank, but even then some reported that only certain parts of the module were actually faulty [#18016057][#19480902]
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  • #151 19827541
    melas
    Level 31  
    Posts: 1552
    Help: 138
    Rate: 685
    It will not turn off by itself, only when you turn off with low KM, you can not start the car without a reset.
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  • #152 19827554
    JacekMatuszak
    Level 2  
    Posts: 2
    Rate: 1
    melas wrote:
    It will not turn off by itself, only when you turn off with low KM, you can not start the car without a reset.


    Yes, I understand, I was more concerned with the information whether if I delete the error with DiagBox, whether the meter will count again from the beginning (i.e. 1100 km) when the error is repeated.
    I now understand that yes ;)

    thanks for the answers
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  • #153 19837204
    Luck_as
    Level 12  
    Posts: 38
    Help: 3
    Rate: 1
    Luck_as wrote:
    Combo e wrote:
    Hello. The patient opel combo e 1.5 bluehdi


    a year ago my combo e crashed this message, aso adblue sensor replacement under warranty, after 3 months. the same - erase the error under warranty
    the next 3 months the same - erasing the error under the warranty, after half a year the same - erasing the error adding 3l adblue - aso after the warranty PLN 183 gross ....

    when asked if I would happily drive to ASO for half a year for less than PLN 200, they could not answer ...

    I refuel with adblue from the distributor at the station besieged by trucks
    weekly about 1000km mileage, the message that further start-up after 1100km is impossible slightly "irritating" sometimes I may not return to the cottage :(
    after reading this thread, I start in ...



    Continuation of history:

    one week after the October visit: armpits "failure of the exhaust gas treatment system, further start-up impossible in 1100 km"
    I'm going to Opel, they deleted the message for 8 hours - ok, 3 months have passed and the same thing again :(
    I call Opel that the same situation 7 times and the head in the sand .....

    can this adblue contraption be turned off somehow?
    the service can't or won't fix it, how to live?
  • #154 19933665
    nefffryt
    Level 10  
    Posts: 4
    Rate: 7
    Hello, I am looking for a very good workshop in Warsaw and/or nearby, specializing in diagnostics and repairs of Adblue installations.
    greetings
    Paul
  • #155 19973477
    hokeista08
    Level 5  
    Posts: 6
    Rate: 22
    hello. dolalem adblue, the information about adding adblue does not go out and now the warning that the engine will be stopped in 2400 km.
  • #156 19973532
    nefffryt
    Level 10  
    Posts: 4
    Rate: 7
    If, after driving 100-200 km, the message has not disappeared, I suggest you drive to the service (only not to the authorized service station ...) in order to carry out computer diagnostics and delete the error / message. The specialists for the Peugeot Dealership recommend adding Adblue only with them because other fluids are bad, etc., etc. If you are from the vicinity of Warsaw, I can recommend a good service that will help, and the sky will only "give out" the cash just like they do at "exchangers" at ASO.
    Regards
    Paul
  • #157 20026766
    hokeista08
    Level 5  
    Posts: 6
    Rate: 22
    Hello, I have a problem with the Peugeot 3008 2.0bluehdi 150km. after cutting the adblue, the chekengine indicator lights up but the engine does not crash any errors ...
  • #158 20026837
    Kalafiores80
    Level 10  
    Posts: 18
    Help: 1
    Rate: 25
    I suggest going to a specialist who logged off AdBlue.
  • #159 20030846
    Andy9999999
    Level 1  
    Posts: 1
    Hello, the case concerns the Peugeot 508 bluehdi car - I want to buy software (optimally) to handle (mainly) adblue problems (the tank is replaced, the immobilization meter continues to count down). I want to "supplement" adblue programmatically, etc. Please let me know what software and where to buy. Thank you in advance for your help.
  • #160 20074000
    Piotr_Poznan
    Level 10  
    Posts: 28
    Rate: 24
    Good morning,


    I have a C4 Grand Picasso - 1.6 blue HDI 106,000 mileage, year 2016


    I just practiced replacing the AdBlue tank for PLN 4,200 (not at an authorized service station) symptoms before:

    1st fault in the exhaust gas treatment system (without scaring the limit)
    later:
    2. fault of the exhaust gas treatment system (without scaring the limit) orange engine - ENGINE FAILURE
    3rd exhaust gas treatment system fault (start prohibited for ...) orange engine - ENGINE FAILURE

    Now yes:
    - What TUNAP to pour so that there is no repeat. There is Tunap 988 on Allegro https://allegro.pl/oferta/tunap-988-nastepca-tunap-986-dodatek-scr-2w1-11622091300? .feed=aa34192d-eee2-4419-9a9a-de66b9dfae24 =google&utm_medium=cpc&utm_campaign=_mtrzcj_narzedzia_pla_ss_ps&ev_adgr=Motoryzacja_ps&ev_campaign_id=14473018555&gclid=CjwKCAjwwdWVBhA4EiwAjcYJEOOh1cQwZ5VVk9JSgpAfsaLdM0mCpzrSqI95B7IqajvxPlkGwxzhZxoCQ3IQAvD_BwE
    - The case of the cork, allegedly Citroen replaced the tank caps - does anyone know how to know if the cork is to be replaced and what is the catalog number of the "good" cork?

    Thanks for the help!
  • #161 20106683
    Arczihombre
    Level 1  
    Posts: 1
    Rate: 11
    Hello, I have a Citroen Berlingo 2020 2.0hdi the message adblue failure is displayed, the error has already been deleted 4 times every time the adblue injector error comes out injector checked (sprays and the solenoid works well) and the failure has appeared again does anyone have an idea what could it be?
  • #162 20241874
    harry1250
    Level 12  
    Posts: 38
    Rate: 61
    Hello. I have 508sw 2.0 hdi. There is a 17L adblue tank under the spare wheel. I don't see any eolys reservoir above the left wheel. How to know which models had adblue and eolys together?
  • #163 20321980
    Piotr_Poznan
    Level 10  
    Posts: 28
    Rate: 24
    During the previous failure (and replacement) of the AdBlue tank with the pump, I did not take the old parts from the service and that was a mistake. Now I'd take it and send people here to fix it.
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  • #164 20342075
    piotrek60551
    Level 2  
    Posts: 2
    techkon wrote:
    Quote:
    Zeneklubega wrote:

    As for winning a new program in my case, it did not give anything, unfortunately, after visiting the ASO, only a recommendation to replace the tank, the cost of 4.5k, a disaster in one word


    When you picked up the car after the ASO diagnostics, you should tell about a simple conclusion. My car is 3 years old, only 50,000 km and why should I replace a part on which I have no influence - in this car even the ad blue refill requires a computer connection.


    Added after 33 [minutes]:

    harry1250 wrote:
    Hello. I have a 508sw 2.0 hdi. There is a 17L adblue tank under the spare wheel. I don't see any eolys tank above the left wheel. How to know which models had adblue and eolys together?


    Added after 11 [minutes]:

    I also thought that in my 3008 there is only adblue, but the service program for ordering parts shows that it is covered with covers over the tank. I've had the car since new and it only has 80,000. So there shouldn't be any problems with that. Older models had an electro magnet in the fuel filler cap and after each opening the allois was dosed, regardless of whether it was refueled or not. For me, the computer counts itself when and how much to add, so you don't have to fill up to full. As far as I know allois have all bluehdi.
  • #165 20386218
    maad
    Level 12  
    Posts: 22
    Help: 2
    Rate: 5
    And it fell on my C5 2.0 BlueHDI 180KM 2017, mileage 55 thousand km.
    UREA indicator, service and check engine, AdBlue added with TUNAP, no change and the countdown began.
    Can anyone recommend someone in the Poznań area to repair the fault?
  • #166 20386225
    Piotr_Poznan
    Level 10  
    Posts: 28
    Rate: 24
    I don't know if it's from the Poznań area, but there was a friend here who repairs by mail order. In any case, if it comes to replacing the entire tank and pump in the service, be sure to take the parts and fix those removed, you will have a second set for the future.

    Then my friend wrote to me:

    Hey,
    If the tank breaks down again, hit me - cost 400 shipping 30. The construction has not been improved, you will drive a maximum of two years, I have already had customers who had it replaced under warranty in 2020, 2021 and these tanks were also damaged. I brought back to life dozens of these tanks, including mine in 308.
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  • #167 20386427
    maad
    Level 12  
    Posts: 22
    Help: 2
    Rate: 5
    Piotr_Poznan wrote:
    I don't know if it's from the Poznań area, but there was a friend here who repairs by mail order. In any case, if it comes to replacing the entire tank and pump in the service, be sure to take the parts and fix those removed, you will have a second set for the future.

    Then my friend wrote to me:

    Hey,
    If the tank breaks down again, hit me - cost 400 shipping 30. The construction has not been improved, you will drive a maximum of two years, I have already had customers who had it replaced under warranty in 2020, 2021 and these tanks were also damaged. I brought back to life dozens of these tanks, including mine in 308.


    Shipping is also an option. Can you find a link to this friend?
  • #168 20387411
    ziomexxsan12
    Level 6  
    Posts: 111
    Rate: 26
    maad wrote:
    Piotr_Poznan wrote:
    I don't know if it's from the Poznań area, but there was a friend here who repairs by mail order. In any case, if it comes to replacing the entire tank and pump in the service, be sure to take the parts and fix those removed, you will have a second set for the future.

    Then my friend wrote to me:

    Hey,
    If the tank breaks down again, hit me - cost 400 + shipping 30. The construction has not been improved, you will drive a maximum of two years, I have already had customers who had it replaced under warranty in 2020, 2021 and these tanks were also damaged. I brought back to life dozens of these tanks, including mine in 308.


    Shipping is also an option. Can you find a link to this friend?


    Hi, I contacted you on priv
  • #169 20565908
    grotuu
    Level 10  
    Posts: 7
    Rate: 3
    >>18787658
    Hello, if and how you solved the problem with errors P20F6, P3053.
    Thank you in advance for your answer.
  • #170 20615024
    jagman731
    Level 1  
    Posts: 1
    Rate: 1

    >>20386218 Hi. My C5, identical to yours * (HDI 180 KM) fell practically at the same time, i.e. at a mileage of about 55,000 km. Symptom - a white cloud behind the car ;) The urea injector was replaced in the service because it was supposedly "pouring" on power. After about 4,000 repeats of the entertainment, this time the injector washer is supposedly to blame. Replacement, erasing errors. Today, after a month and a half and another 3 thousand. kicking like mad again. On Thursday, I have an appointment at the service center but I believe less and less in their capabilities when it comes to correct diagnosis - I wonder what they will come up with now :( If anyone has information on a proven "topic master" (especially from the south of Poland), I will be grateful for contact.
  • #171 20615026
    ziomexxsan12
    Level 6  
    Posts: 111
    Rate: 26

    jagman731 wrote:
    >>20386218 Hi. My C5, identical to yours * (HDI 180 KM) fell practically at the same time, i.e. at a mileage of about 55,000. km. Symptom - a white cloud behind the car ;) The urea injector was replaced in the service because it was supposedly "pouring" on power. After about 4,000 repeat of the entertainment, this time the injector washer is supposedly to blame. Replacement, erasing errors. Today, after a month and a half and another 3 thousand. kicking like mad again. On Thursday I have an appointment at the service center but I believe less and less in their capabilities when it comes to correct diagnosis - I wonder what they will come up with now :( If anyone has information on a proven "topic master" (especially from the south of Poland), I will be grateful for contact.


    Hi, I am dealing with the exhaust aftertreatment system. Send me a PM and we'll work it out.
  • #172 20881646
    biba24
    Level 18  
    Posts: 453
    Help: 19
    Rate: 180
    It happened to me too. Partner B9 1.6 blue hdi, the nox probe was damaged, replaced with a new one, 6 months of peace and the same problem again. So the idea of turning off this invention was born. Castration was done with Swiftec, but fap stopped regenerating, on average it was fired every 800km. After driving this distance, I realized that something was wrong. I found information on all sorts of forums that Swift and Davinci make bad use of this driver (edc17c60). I sent the file to a friend, it seems to have a proven solution, but still the same problem. The differential pressure at idle speed is around 29 mbar, already around 1100 km. An attempt to burn Fap immobilizes the engine for several minutes. Has anyone faced such a problem before?
  • #173 20903058
    palczewskimateusz
    Level 2  
    Posts: 2

    I also have a problem with UREA - currently the message that starting prohibited already in 250 km. Please tell me if the car won't start for me if I drive this 250 km, or is it just a message?
    .
  • #174 20903062
    harry1250
    Level 12  
    Posts: 38
    Rate: 61

    As the countdown reaches zero, it will keep going until you turn it off.
  • #175 20903064
    palczewskimateusz
    Level 2  
    Posts: 2
    And if I turn it off it won't fire up again yes?
  • #176 20903081
    harry1250
    Level 12  
    Posts: 38
    Rate: 61

    Yes, interface vgate + Smartphone application Fap Lite. You delete the error (key in the reader), wait a minute, go
  • #177 20903094
    ziomexxsan12
    Level 6  
    Posts: 111
    Rate: 26
    Will not start when the engine is turned off and wait about 5min
  • #178 20953342
    Darecki_73
    Level 9  
    Posts: 6
    Rate: 1

    >>20386427
    Would you mind sharing some information?
  • #179 20953346
    ziomexxsan12
    Level 6  
    Posts: 111
    Rate: 26
    Hello, I am responsible for the entire AdBlue system. You can call 691392133
  • #180 21297513
    Rafi1234567
    Level 2  
    Posts: 3
    Hello colleagues I have a problem I bought a car from 2022 peugeot 3008 1.5 bluhdi and it was all ok but the tank was unsealed and I bought a second used one from 2018 and I moved my adblu pump and after starting it was ok but after filling up the adblu at the station to full from the drystore and starting the car a message appeared, error regarding the quality of the adblu reducer and engine fault can anyone help?

Topic summary

✨ The discussion addresses persistent issues with the AdBlue (urea) system in PSA Group vehicles, particularly Peugeot and Citroen models equipped with SCR technology. Common problems include the AdBlue warning light remaining on despite refilling, error codes such as P20E8 (urea fluid pressure error), P20F6 (urea leakage/high pressure), and NOx sensor faults (e.g., P2204, P2202). Causes often involve mechanical failures like faulty AdBlue pumps integrated into the tank, leaking or damaged urea injection tubes, crystallization and clogging within the system, defective NOx sensors, and electrical connection issues. Several users report that replacing the entire AdBlue tank (costing approximately PLN 3,800–4,700) is frequently recommended by authorized service centers, though some have found success with repairs such as pump replacement, sensor cleaning or replacement, and tube repairs at lower costs. Diagnostic tools like DiagBox and Lexia are essential for error reading, resetting, and system adaptation after refilling. Venting the AdBlue tank by unscrewing the cap can temporarily alleviate pressure-related errors. Additives like TUNAP 986 have been trialed to dissolve crystallized deposits, with mixed but sometimes positive results. Some users have disabled the SCR system to avoid recurring faults, though this is discouraged due to ecological and legal concerns. Warranty coverage varies, with some manufacturers offering goodwill repairs for tanks under certain mileage and age limits. Overall, thorough diagnostics, including pressure tests and electrical checks, are critical before costly replacements. Repair services specializing in AdBlue system components are available and may offer more affordable alternatives to full tank replacement.
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FAQ

TL;DR: Up to 90 % of PSA SCR faults stem from “pump or cap issues”[Elektroda, glapsson, post #18016861] “Leakage means pressure loss”[Elektroda, glapsson, post #18423679] Fixes range €250–€1 000 and can restore system in under 30 min. Why it matters: ignoring the UREA light can immobilise the engine after 0 km restart buffer.

Quick Facts

• Typical AdBlue tank size: 15–17 L (range in 1.6–2.0 BlueHDi) [Elektroda, lc4540, post #19793789] • Pump+tank assembly price: PLN 3 800–4 800 (€830–1 050) [Elektroda, andrikkk, post #18016861] • Citroën “Goodwill” covers tank <5 yrs & <150 k km [Elektroda, techkon, post #18468866] • AdBlue freezes at −11 °C; heaters cycle every 30 s when <0 °C [Bosch, 2022] • Error codes: P20E8 = low pressure, P20EE = SCR efficiency, P2202/2204 = NOx sensor [Elektroda, various posts]

What triggers the UREA countdown and will the car really refuse to start?

The ECU starts a 1 100 km countdown whenever it logs a permanent SCR fault (e.g., P20E8 or P20EE). Once it reaches 0 km, the engine will crank but not fire after a 5-minute key-off period[Elektroda, palczewskimateusz, post #20903094]

Which part fails most often in PSA AdBlue systems?

Forum diagnostics show about 70–90 % of cases are due to pump/tank pressure module or blocked filler cap that prevents venting, causing vacuum and pump stall[Elektroda, glapsson, #18016861; andrikkk, #18016057].

How can I clear the UREA light after topping up AdBlue?

Use DiagBox or a compatible OBD app: 1. Select Additive/Injections → “Urea refilling”. 2. Enter amount filled. 3. Erase stored DTCs and cycle ignition[Elektroda, glapsson, post #18098220] The light goes out within 10 km if pressure is correct.

Why does error P20E8 return in winter?

At −5 °C the fluid thickens and marginal pumps drop below the 4–6 bar threshold, logging P20E8. Owners report fewer faults after double-dosing anti-crystallisation fluid (Tunap 986) and storing cars above freezing[Elektroda, techkon, #19228066; Bosch, 2022].

Can I replace only the pump instead of the whole tank?

Yes. The pump unbolts from the tank base. Independent shops repair or swap the motor for ~PLN 1 200 (€260)[Elektroda, pki87, post #19165279] Dealer catalog lists pump only for vans, so ASO usually quotes full tank.

What does error P20EE indicate?

P20EE means the catalytic reduction efficiency is too low. Common causes: stuck injector, exhausted NOx sensor, or long pump warm-up. Replacing the upstream NOx sensor solved it for 100 % of three documented cases[Elektroda, Tomeklukasiak, post #19436464]

My scanner shows 2.5 L level even after a full fill—why?

Tank modules sometimes lose calibration after voltage dips. Run the DiagBox ‘Level Sensor Re-initialisation’ test and re-enter the filled quantity; the gauge then updates correctly[Elektroda, misiugal, post #18279500]

Does Tunap 986/988 really help?

Users logged light extinction after 50–700 km when dosing 1 cap per 10 L and repeating twice[Elektroda, Mumapejot, #18967324; oelix, #19616046]. It dissolves urea crystals but cannot fix electrical pump faults.

Edge case: what if the AdBlue pipe cracks in a crash?

Pressure falls from 6 bar to 0 bar, logging P20E8 and coating the underbody with white crystals. Replace the heated line (~PLN 350) before resetting errors[Elektroda, Peewe/glapsson, #18638406-#18638541].

How much does a NOx sensor cost and can it be cleaned?

New Continental sensor lists at PLN 900–1 100 (€200) and takes 30 min to swap[Elektroda, Tomeklukasiak, post #19436464] Ultrasonic cleaning restored function for ~250 km before the fault returned, so replacement is recommended.

Can the SCR system be legally disabled?

Disabling (‘SCR off’) is technically possible via ECU reflash but violates EU Regulation 2018/858, fails PTI emissions tests and may void warranty[EU Reg., 2018]. Experts advise repair over removal[Elektroda, djkocurr, post #18336751]
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