Citroen C5 X7 Throttle exhaust problems

[Mimi]

Marc, Can you see through the VIN number which Air Mixer is for my car? VIN number is VF7**************[VIN obfuscated, can be read by forum staff]

[GiveMeABreak]

Hi, please note that for part numbers we require a min. Forum donation of £10 - but this will cover you for up to 2 years of part number requests, as you know PSA now charge for this data.

Details here:

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If you want to go ahead use the link in the table and your membership will be upgraded, then I'll be able to help you.

[Mimi]

Hi Marc, I make a donation, can you now help me?

[GiveMeABreak]

Hi

No problem, thanks for the Forum donation.

The Air Doser for your vehicle is item (7):

It is part number: 0345G7 and costs £332.81 (UK Sterling) so 45,464.29 Serbian Dinar.

But at least with this part number you can search for the correct one. Be warned though, some aftermarket - non-originals may be different, so stick to a Citroen one if possible.

[Mimi]

Thanks, then I have a good air mixer on my model . But I still have 2 faults (P0488 and P1498), when I drive my car and rpm goes over 3000 the Check Engine appears and my car lost power. After a few moments car is working normally. What else can be a problem, I check the air mixer but everything working ok on him.

[GiveMeABreak]

Give me a second to look these up....

[GiveMeABreak]

Ok, so there was a Technical Service Bulletin issued from Citroen regarding these fault codes against your VIN:

ILLUMINATION OF THE DIAGNOSTIC WARNING LAMP WITH OR WITHOUT LOSS OF POWER - IN THE PRESENCE OF ONE OR MORE OF THE FOLLOWING FAULT CODE(S) P0488, P1498, P11AB, P11AB

Origin of Fault is the Air Mixer Repair Details: Check of the air mixer control. Replacement: Of the air mixer Of the air mixer solenoid valve Of the vacuum pipe between the air mixer and the air mixer solenoid valve Parts Needed: 1 Air mixer(Part No. depending on vehicle specification). 1 Air mixer electrovalve(Part No. depending on vehicle specification). 1Vacuum pipe between the solenoid valve and the air mixer (Part No. depending on vehicle specification). Fault Code Reading Read the fault codes: In the presence of one or more of the following fault code(s) P0488, P1498, P11AB, P2125: Carry out the check. If there are no fault codes present: Do not apply this document (N.B. : The fault code(s) may be accompanied by other fault codes) Check Check the air mixer control rod: If the control rod is uncoupled: Carry out the repair If the control rod is coupled: Do not apply this document - Carry out in-depth fault finding Repair Replace: The air mixer The air mixer solenoid valve The vacuum pipe between the solenoid valve and the air mixer Erase Fault Codes

So A few things to check - the test is described above to check the Air Mixer, but don't also forget to check the electrovalve operation / vacuum circuit.

[Mimi]

Thanks Marc, one more question, where is position of Air mixer solenoid valve?

[GiveMeABreak]

Here's the supply: (Don't forget to check the filter at (3) as these can become clogged up).

(2) Air inlet manifold with integral vacuum reserve.
(3) Breather and filter for all the control electrovalves.
"c" Outlet towards the proportional electrovalves controlling the double mixer.
"d" Pressure drop inlet for the vacuum pump.
"e" Outlet to electrovalves :
Proportional electrovalve controlling the variable resistance turbocharger
Control electrovalve for the EGR heat exchanger by-pass

Here's the electrovalves:

(4) Proportional electrovalve controlling the variable resistance turbocharger.
(5) Cold air circuit electrovalve.
(6) Hot air circuit electrovalve.
(7) Variable geometry turbocharger.

[zedhal]

Hello everyone,

I just came across this interesting topic.

I too have a Citroen C5 2L 163BHP 2009, mine has manufacture fitted double doser, all electrics and vacuum parts work fine.

However, during a service, I too realised that the upper pipe was blocked off. This is how the care came out of manufacturing.

As of recent, the left inlet pipe, which is blocked off and by diagram is meant to intake warm air has become soft over the years from heat and oil dripping on to it.

It is now that I have notices when I start of in 1st and 2nd gear, the car whistles. I believe that it is drawing in air through the pipe’s sidewall. What is strange, is that the car feels more nifty/quicker. So I too was considering one of the following:

- To drill a hole in the upper inlet to allow mixing of the warm air.

- Or to put a mushroom air filter temporary to see its affects.

Does anyone have any advise or suggestions on either of above ideas, or has anyone got any other thoughts and suggestions?

Thanks!

[ar80]

Hello, I drive a Peugeot 3008 2.0 hdi 150 hp, I have a problem with the throttle. In the morning, when I start the engine and the hot air pipe, the bypass is crushed, after warming up the engine is repaired. Where there may be a problem, there are no recorded errors. I'm asking for help.

[zedhal]

Hello ar80, I am not an expert. But could you confirm the following:

Do you too have double doser,for air intake. One for hot (bypass) and one for cooled air.

If so, is the bypass also blocked at the bottom where it is branching. If so, then it could be that one of the pipes from one of the two flaps control units has come lose or worn. Hence forcing the car to use the bypass, your issue is related to incorrect air mixture I believe.

[Davidlorenzone]

I was going to suggest that maybe somebody has fitted one from another model - it talkes a while for the engine ECU to adapt / adjust to the new readings - but it has highlighted the errors as you can see.

The Doser for your car is shown here as item 7.



Part number is 9677515880 Cost in the UK from Citroen is £352.46 So I would try and source one using this part number. The old part number was 0345F4, before it was replaced with the one above - but you have both in case it helps you source one.

HI, in my case the plastic pipe is factory sealed. should i drill a hole here?

Hi! My name is David, I am new in the forum and I have the exact same question. I have a double doser but the plastic pipe is blocked! Is that normal? Did you finally drill the hole? Did it improve something? My car looses aceleration randomly and the error that it shows is air mixer related.
Thanks in advance

[zedhal]

Hi David, I have sold my C5 since and bought a C5 Aircross. However, while I did not drill the hole, I purchased a mushroom filter and attached it to the blocked pipe. Note that this is blocked by design. In terms of what I notices as in the difference, well the car felt more jumpier, quicker on acceleration, but this also reflected in mpg, as it dropped from 42mpg to 34.9mpg