Hello. C4 Picasso wiped the FAP bag, which threw the message about the low state of the FAP add-on. After replacing and entering the capacity of the new bag, the parameters indicate the correct values, but the error does not disappear. Is full refueling required?

In addition to entering the new capacity, do you need to accidentally enter the service tasks with the tester and choose the option add-on supplement or something like that?

What face did you do reset? Because in many cases it can only be deleted with Lexia

Lexia Proxia can't help it. Shows message it's done and that's all. Diagbox needed.

I don't know if it will work for you but disconnect the battery for a while and try again.

It wasn't until six together. Thanks for the time. close

And can you tell what procedure you did and what to enter? I have this error and also deletes, shows that ok and the error returns - I have a diagbox 7.82 or 7.83 I do not remember exactly. Several times I clicked to clean up errors and nothing like it clears but the error returns.

Hello, a little refreshed the topic after replacing the entire tank together with the pump everything in the driver of the add-on ok but the error can not be deleted. before or after replacement the error is the same whether it could be the fap filter itself completely clogged or something else

And did you tell the driver that you replaced?

C4 Picasso 1.6 Hdi - Error P1446 still after replacing the FAP bag.

sly_1978 22251 14

This content has been translated

View the original version here

Report a violation of the law

Reply | New topic

#1 16727494 29 Sep 2017 09:20

sly_1978 sly_1978

Level 20

» | Topic author

Post #1
16727494 29 Sep 2017 09:20

Hello.
C4 Picasso wiped the FAP bag, which threw the message about the low state of the FAP add-on. After replacing and entering the capacity of the new "bag", the parameters indicate the correct values, but the error does not disappear. Is full refueling required?

ADVERTISEMENT
#2 16727597 29 Sep 2017 10:31

maceek16 maceek16

Level 11

» | Helpful post? (+3)

Post #2
16727597 29 Sep 2017 10:31

In addition to entering the new capacity, do you need to accidentally enter the service tasks with the tester and choose the option "add-on supplement" or something like that?
#3 16727614 29 Sep 2017 10:48

sly_1978 sly_1978

Level 20

» | Topic author Helpful post? (0)

Post #3
16727614 29 Sep 2017 10:48

maceek16 wrote:
In addition to entering the new capacity, do you need to accidentally enter the service tasks with the tester and choose the option "add-on supplement" or something like that?

I did it too.
ADVERTISEMENT
#4 16728965 29 Sep 2017 22:53

Jamrug Jamrug

Level 17

» | Helpful post? (0)

Post #4
16728965 29 Sep 2017 22:53

What face did you do reset? Because in many cases it can only be deleted with Lexia
#5 16729171 30 Sep 2017 06:35

robi1214 robi1214

Level 31

» | Helpful post? (+3)

Post #5
16729171 30 Sep 2017 06:35

Lexia Proxia can't help it. Shows message it's done and that's all. Diagbox needed.
#6 16729181 30 Sep 2017 07:11

sly_1978 sly_1978

Level 20

» | Topic author Helpful post? (+1)

Post #6
16729181 30 Sep 2017 07:11

robi1214 wrote:
Lexia Proxia can't help it. Shows message it's done and that's all. Diagbox needed.

Made both DB and AutoCom.
ADVERTISEMENT
#7 16729237 30 Sep 2017 08:58

fructon fructon

Level 33

» | Helpful post? (0)

Post #7
16729237 30 Sep 2017 08:58

I don't know if it will work for you but disconnect the battery for a while and try again.
#8 16729295 30 Sep 2017 09:55

sly_1978 sly_1978

Level 20

» | Topic author Helpful post? (+2)

Post #8
16729295 30 Sep 2017 09:55

It wasn't until six together. Thanks for the time. close
#9 16737558 04 Oct 2017 15:18

Anonymous Anonymous

Level 1

» |

Post #9
16737558 04 Oct 2017 15:18

sly_1978 wrote:
It wasn't until six together. Thanks for the time. close

And can you tell what procedure you did and what to enter? I have this error and also deletes, shows that ok and the error returns - I have a diagbox 7.82 or 7.83 I do not remember exactly.

Several times I clicked to clean up errors and nothing like it clears but the error returns.
#10 18202080 04 Oct 2019 20:56

k0lega k0lega

Level 2

» | Helpful post? (+3)

Post #10
18202080 04 Oct 2019 20:56

Hello, a little refreshed the topic after replacing the entire tank together with the pump everything in the driver of the add-on ok but the error can not be deleted. before or after replacement the error is the same whether it could be the fap filter itself completely clogged or something else
ADVERTISEMENT
#11 18202233 04 Oct 2019 21:59

sly_1978 sly_1978

Level 20

» | Topic author Helpful post? (0)

Post #11
18202233 04 Oct 2019 21:59

k0lega wrote:
Hello, a little refreshed the topic after replacing the entire tank together with the pump everything in the driver of the add-on ok but the error can not be deleted. before or after replacement the error is the same whether it could be the fap filter itself completely clogged or something else

And did you tell the driver that you replaced?
#12 18202264 04 Oct 2019 22:17

k0lega k0lega

Level 2

» | Helpful post? (+1)

Post #12
18202264 04 Oct 2019 22:17

Yes, in diagbox, I replaced the entire tank because it was also telecoding. dry test successful pump works 0 errors in the tank control itself. The error is only in the engine. Each time the error is cleared after starting the car, the error returns
#13 18202313 04 Oct 2019 22:45

sly_1978 sly_1978

Level 20

» | Topic author Helpful post? (0)

Post #13
18202313 04 Oct 2019 22:45

k0lega wrote:
Yes, in diagbox, I replaced the entire tank because it was also telecoding. dry test successful pump works 0 errors in the tank control itself. The error is only in the engine. Each time the error is cleared after starting the car, the error returns

And what fluid level do you see in the parameters?
#14 18205683 06 Oct 2019 22:02

bobytempelton bobytempelton

Level 17

» | Helpful post? (0)

Post #14
18205683 06 Oct 2019 22:02

Only this mistake or are they different too? there are cables like Christmas lights from China, 4 strands, cables break ... if there is only an error in this dispenser, focus only on these cables, if something is still picking up, pull the beam from the controller to the engine and somewhere something is not a waste of time replace the cables.
#15 18205903 07 Oct 2019 01:30

k0lega k0lega

Level 2

» | Helpful post? (+5)

Post #15
18205903 07 Oct 2019 01:30

Thanks I will give it a rest. Can be closed
Create an account, log in here. You will receive points by participating in discussions.
Join this discussion.

Install Elektroda application

Didn't find an answer? Ask Artificial Intelligence

*I agree to send the question to OpenAI, Anthropic PBC, Perplexity AI, Inc., Kagi Inc., Google LLC - owners of language models in order to prepare the best response. The companies may monitor and log information entered into the form.

*I agree to publicly display my question and answer. The question and answer will be publicly available to everyone. The process may take a few minutes. Upon completion, you will be redirected to the page with the answer.

Wait...(2min)

Reply | New topic

Report a violation of the law

Topic summary

✨ The discussion revolves around the persistent P1446 error in a Citroën C4 Picasso 1.6 HDi after replacing the FAP (Filtre à Particules) bag. The user initially replaced the bag and entered its capacity, but the error remained. Responses suggest that in addition to entering the new capacity, service tasks may need to be performed using a diagnostic tool. Users mention that tools like Lexia and Diagbox are necessary for clearing the error, with some indicating that simply resetting the system or disconnecting the battery may not resolve the issue. Further troubleshooting includes checking the fluid level and inspecting wiring for potential faults. The discussion highlights the importance of proper diagnostics and coding after component replacement.
Generated by the language model.

FAQ

TL;DR: In this C4 Picasso 1.6 HDi case, 2 tools were tried—"Made both DB and AutoCom." Clearing P1446 sticks only after the correct additive-service reset and confirmation. [Elektroda, sly_1978, post #16729181]

Why it matters: This FAQ helps owners and techs fix P1446 after FAP bag/tank work without needless parts swaps.

Quick Facts

P1446 persisted after entering new bag capacity until the right service task was performed. [Elektroda, maceek16, post #16727597]
Lexia/Proxia reports "done," yet the fault remains; Diagbox is required. [Elektroda, robi1214, post #16729171]
OP confirmed using Diagbox and AutoCom during successful reset attempts. [Elektroda, sly_1978, post #16729181]
Battery disconnect was suggested as a retry aid before re-running the reset. [Elektroda, fructon, post #16729237]
Harness to the additive dispenser has 4 conductors and is prone to breaks. [Elektroda, bobytempelton, post #18205683]

How do I clear P1446 after replacing the FAP additive bag?

Use Diagbox, run the additive service task, then erase faults. Lexia/Proxia may say "done" but won’t clear P1446. "Diagbox needed." [Elektroda, robi1214, post #16729171]

Do I need to tell the ECU that I replaced the additive bag or tank?

Yes. In Diagbox, declare the replacement so the additive controller updates counters and status. Without that, the engine ECU can keep P1446. [Elektroda, sly_1978, post #18202233]

Which tool works best: Lexia, Proxia, Diagbox, or AutoCom?

Diagbox is the reliable path for clearing P1446 after additive work. Lexia/Proxia reports completion but the code returns. [Elektroda, robi1214, post #16729171]

Is a full refuel required to clear P1446 after bag replacement?

The thread fix focused on performing the correct Diagbox additive task and clearing errors; refueling wasn’t identified as the key step. [Elektroda, sly_1978, post #16729181]

Diagbox says the procedure finished, but the code returns on restart—what next?

Repeat the additive service task, confirm telecoding, then clear faults again. Users reported clearing, restart, and immediate return before proper reset. [Elektroda, Anonymous, post #16737558]

I replaced the entire additive tank and pump; why is P1446 still present?

The additive module can show zero errors while the engine ECU still logs P1446. Clear the engine ECU after declaring the replacement. [Elektroda, k0lega, post #18202264]

What fluid level should appear in live parameters after the fix?

You should see a valid, non-zero additive quantity consistent with a new bag/tank in the parameter list. Verify before clearing faults. [Elektroda, sly_1978, post #18202313]

Could a clogged FAP/DPF alone cause P1446 here?

This discussion points first to the additive system path—declaration, resets, and wiring—before suspecting the filter itself. Check those items. [Elektroda, bobytempelton, post #18205683]

Can wiring issues trigger or sustain P1446?

Yes. The dispenser harness is fragile; it uses 4 wires that often break. Replace or repair the loom if faults persist. [Elektroda, bobytempelton, post #18205683]

Will disconnecting the battery help during the reset process?

It can help you retry from a clean state. Disconnect briefly, reconnect, then rerun the additive service task and clear codes. [Elektroda, fructon, post #16729237]

Why does the code clear, then immediately return when I start the car?

The engine ECU reevaluates the additive system on startup. If declaration or wiring is incomplete, P1446 reappears right away. [Elektroda, k0lega, post #18202264]

What is the FAP additive bag on PSA diesels?

It’s the reservoir holding the particulate-filter additive used for regenerations. Replacements require ECU declaration and service reset. [Elektroda, sly_1978, post #16727494]

Any quick 3-step how-to for the post-replacement reset?

In Diagbox, declare additive bag/tank replacement and save. 2. Run the additive refill/prime service task. 3. Clear engine faults, cycle ignition, recheck parameters. [Elektroda, robi1214, post #16729171]

What finally worked for the original poster?

Multiple attempts with the right tools were involved; the OP confirmed using Diagbox and AutoCom during the successful resolution. "Made both DB and AutoCom." [Elektroda, sly_1978, post #16729181]

Generated by the language model.