C4 Picasso 1.6 HDI FAP 2009 - After replacing the EGR valve still errors and ign

C4 Picasso 1.6 HDI car with FAP 2009 109 km. Mileage 171 thousand km. MCP gearbox.
I am asking for your understanding. This is my first post

I have a car for 2 years. In May, the "check engine" light and the message "antipollution system fault" lit up.
After connecting Diagbox ver. 7.02 I read the following errors:
P0405 - EGR valve electrical connection signal
P1459 - EGR valve electrical connection signal
P0409 - EGR valve electrical connection signal
P0490 - EGR valve electrical connection signal
P0489 - EGR valve electrical connection signal
(error descriptions can be supplemented later when I reconnect the tester)

The following errors remained after deletion:
P0490 - EGR valve electrical connection signal
P1459 - EGR valve electrical connection signal

I replaced the EGR valve with a NTY replacement



Unfortunately, after replacing the valve, unsuccessful adaptation and deletion, I have the following errors:
P0490 - EGR valve electrical connection signal
P1459 - EGR valve electrical connection signal
P0409 - EGR valve electrical connection signal - valve stuck during learning
(adaptation carried out on a cold engine after night brought nothing)

Then I replaced the new one - the plug and installation from the plug to the controller (the new plug completely with new pins, installation soldered about 5 cm from the plugs at the controller). Old installation cut and removed. And nothing helped.

When testing the components, the EGR valve works once and you hear clicking after some time does not work.
Even if the valve works during tests, it is not possible to carry out the adaptation, and after removal immediately, before firing the engine errors P0490 and P1459 and P0409 appear if the adaptation was performed.

I will add that the "check engine" indicator lights up when driving with a heavy load, eg overtaking uphill at high speed or when driving uphill at a speed of 120-130 km / h. Then the car goes into emergency mode and reaches a maximum speed of about 2750. Cruise control also stops working. After restarting the engine the "check engine" indicator lights up but the revs and cruise control return to normal.

Recently during the performance of EGR tests using Diagbox, EGR worked 2-3 times out of 10-15 tests. Sometimes it helps temporarily disconnect the battery. When driving with the tester, the "RCO value of the exhaust gas recirculation solenoid valve" was constant at level 0. Sometimes the "EGR throttle position" value changed on the graph.

I organized 2 used, original EGR valves (I have no idea if they are working) and after connecting the same.

Is the problem only a non-original EGR valve?
Does anyone have to sell a used, functional EGR or can recommend a new replacement that will work 100%.
Maybe someone from Jelenia Góra or the surrounding area has a functional EGR or can help in the diagnosis?

Moderated By CameR:

I deleted the link to Allegro.
Reg. 3.1.18. Do not send links that will stop working after some time. This will cause the discussion to lose any meaning.

I am not a specialist but ...
1. new may be damaged.
2. I heard that in the French in the case of EGR there is a problem with the plugs - you have to squeeze them because they do not give contact. Anyway, they have the same injection plugs, etc. I know that it may be stupid but a lot of cars I repaired and when the plug is not on the prong but flat, there are often some loose and it doesn't touch.

The cable plug is completely new.

I will add that when I measure 12V between contacts 2 and 3 on a connected valve, if I can't hear the valve working during the Diagbox test, I don't have voltage on the meter either (measurement on the wires a few centimeters from the controller).

The 5V voltage between pins 1 and 5 is.
I just don't know what to have on signal pin 4 (should it be 0-5V or can you only measure on the oscilloscope?)

To be honest, this driver falls under my control, only that the diagnostician / electronics from Citroen excludes the driver from working once and not once and betting on the EGR valve and that it should only be original.

I also had a problem with Eger and I had to buy for over 500 onions but now it's ok. Valeo company.

To Tiamath30
You can describe your problems, errors with the EGR valve before replacement and after replacement for a cheaper replacement.
If you can, give the link to the EGR valve that you used and is now OK.
Let me know if you did an apprenticeship for the EGR valve and on a cold engine?

I had a problem with the Christmas tree on the anti-evolution check engine esp abs and something else + full of errors on the computer. It turned out that the egr died. He replaced a mechanic for this one


And he did adaptations. He previously ordered cheaper but it was lime.

Moderated By CameR:

The link to Allegro has been removed.
Reg. 3.1.18. Do not send links that will stop working after some time. This will cause the discussion to lose any meaning.

I recently had the opportunity to test NTY products, namely the level and temperature sensor, oil for the VAG group, each showed a different and false oil temperature (one even -66 * C )

Thanks for the info.
Maybe someone else had problems with cheap EGR replacements and describe what were the problems.
I guess I will buy a Valeo valve the same as I bought Tiamath30.
I hope this solves the problem.

Hello, I'll dig up the topic a little. 9HZ engine, so probably the same. I had no visible problems with the car, I have had the car for 2 months, I connected the DB. It showed errors as in the attachments. Initial P0488 and P1161 removed them, but after a while they appeared again, plus errors P1162 and P0401. In history you can see that errors appear and disappear from time to time. In addition, in the parameters I found in one calculator, the error of learning egr (I do not remember whether the valve or the throttle), the value of the air flow per cylinder (as in error p0401) at ease almost 2 times greater than the set value, after adding the gas the difference is eliminated and almost disappears . Does cleaning the egr can help or is there anything to worry about, because these errors are temporary, not permanent, and nothing bad happens with the car while driving. Can this egr behavior have a bad effect on the FAP filter?

Do you have two air cycles in your car? Direct and via intercooler?

As far as I know, yes.

What's up Which system do you have?

Two circuits.

Make a proper calibration of the system you have in the car, according to the manufacturer's recommendations. You've got hints in the program.

I did not exchange any parts. The only adaptation (not calibration) I can do is egr and throttle. I understand that you write about the throttle.

I'm connecting under the topic.
1.6 HDI 80kW engine in 308 from 2008 without FAP, errors from Diagbox are P1459 and P0490. I have had the car for a month, I do not know if there was something done with the EGR, but the check engine does not light up, the car accelerates at every rpm, the exhaust gases are transparent regardless of the engine load. I have an appointment with the mechanic only after the May weekend. Any ideas what this could be? Blinded EGR would generate such errors?

daniel13m wrote:

Thanks for the info.
Maybe someone else had problems with cheap EGR replacements and describe what were the problems.
I guess I will buy a Valeo valve the same as I bought Tiamath30.
I hope this solves the problem.

Did you solve the problem?
I have similar errors except that my car jerks and does not display the check engine. I have already done 2 EGR valves NTY and one Valeo.

Hello. We recently have a problem with Egr. We have a Toyote Corolla Verso. Several times we were in Toyota for diagnostics, only EGR error burns. Replacement for a replacement. The car lint, there is no power when it is cold (does not exceed 2 thousand revolutions). It turned out that the replacement did not work well.Toyota took the old broken original to resuscitate him (put in acid) they replaced ... I left without a fingerstick lights, standing on the door a new orange light (engine error, VSC, TRC OFF). Return for diagnostics .It turned out that you need a new original. Next Tuesday I have an exchange contract, but now I came back from the store and the controls went out. The car does not pull, it runs smoothly even when it is cold. Earlier we heard that when the new Egr we need to burn it ( high speed but low gear). I was stupid because I do not know what to do? I did not call refuse to exchange because I do not know if it will not catch fire yet. I have time until Tuesday. See.