2009 C5 1.6 HDI - "Risk of particle filter clogging"

[spako]

I think I have located EGR valve behind the fuel filter, just under the air filter:



I have not removed it yet as I'm a bit worried about hose clamp which I don't think can be reused. Can I replace it with a screw type hose clip?

Once it's removed, how do I clean it properly?

Do I need to reprogram/readapt EGR with Lexia once it's been cleaned?

[RichardW]

That's it. Looks like it's unplugged - have you just done that? You can re-use the clamp, but you need a pair of the proper 'Clic' pliers to remove and refit it (eg loads on ebay. AFAIK a normal jubilee clip won't do, as it's a profiled affair.

[citronut]

its actually a flange joint, as Richard says they do come undone and re/do up relatively easily,

i use a pair of modified

https://www.google.co.uk/#q=carpenters+pincers&tbm=shop" onclick="window.open(this.href);return false;
i just grind the jaws so they are thin enough to fit into the clip to undo/ and re/fit, the clip is stainless steel so are quite tough and will stand a bit of pulling around,

also as Richard says did you pull that plug out?????,

i clean these out with carb cleaner

[citronut]

ps.

you could purchase this pair, as they must be gold platted

http://tinyurl.com/kw3s2q7" onclick="window.open(this.href);return false;

[Lighty]

Never had much luck in cleaning these, and the aftermarket ones at about £80 are very hit and miss, seems about a 15% fail rate. This is why we go down the blank off egr & remove DPF route tbh.

[spako]

That's it. Looks like it's unplugged - have you just done that? You can re-use the clamp, but you need a pair of the proper 'Clic' pliers to remove and refit it (eg loads on ebay. AFAIK a normal jubilee clip won't do, as it's a profiled affair.

Yes, I've unplugged the cable and gave it a good blow with an air compressor - it didn't make any difference btw.

The car is currently at the local garage to get the EGR valve replaced with HAAS one from EuroCarParts.

I hope this will sort the problem out.

[spako]

How do I get rid of SERVICE light on the dash once the EGR valve is replaced?

Do I need to perform some sort of EGR adaptation or simply clear all codes?

[Stickyfinger]

Clear codes via Lexia....note, you have to view them before you can delete with some of them

[spako]

OK, so the new EGR valve (HAAS from ECP) has been fitted.

I've cleared the injection faults with Lexia but they came back on straight away:

"Electric EGR valve position copy signal Valve opening too small"



and

"Electric EGR valve position copy signal Valve stuck open while driving"



If I go to "Air information" I can see that all EGR parameters don't change - they sit at 0% where previously only "EGR throttle opening control" was constant 0% (see the picture below from the old EGR) - not sure if that mean anything.

OLD EGR VALVE:



NEW EGR VALVE:



OTHER READINGS:







Could it be a faulty EGR valve?

What else can I do/check?

Please help as I'm at the end of my tether.

[RichardW]

I would say It's either no good, the wrong one, or not connected properly (or the wiring has been damaged). Have you still got the old one? If you reconnect it does the fault change / go away? Can you hear the valve moving just after you switch the ignition off - it should cycle the valve to check the position?

[spako]

Not sure if it makes any difference but I've noticed that the new EGR valve has a broken connector lock so the plug is not secured properly and can be easily pulled out.

I'm dropping off the car back to the mechanic to remove the new HAAS EGR valve and replace it with a new OE quality one (http://www.eurocarparts.com/search/424730150/p/home).

I'll get him to try the old valve too.

Is there anything else I can do to test/diagnose this problem? Do all other readings look OK? Nothing abnormal?

[spako]

New OE quality EGR valve fitted today is giving exactly the same errors on the dash and 0% live data readings... tbh I'm at the end of my tether

I have made an appointment for EGR delete and DPF removal with remap tomorrow.

I hope they will resolve the problem once and for all!

[Stickyfinger]

Such a shame....

do you not have concerns regarding the MOT ?

[spako]

Apparently MOT testers are obliged to only visually check DPF housing and have no way of checking if it's empty or not. According to the garage they haven't had any complaints from customers failing MOT tests...

Do you have a better idea how I can resolve this problem? I'd much rather leave a brand new EGR in but it seems that for some reason my car doesn't like EGRs

[Stickyfinger]

Hi....It must of liked the EGR for many many miles ?

As it seems not to be the EGR and you have zero readings showing....then it has to be down the path that is now most likely, electrical.

There is a large electrical connector down behind the engine, I had big problems with this causing cut outs, Anti-P faults, Engine Management, dpf , fuel pressure...warnings....I disconnected and used loads of contact cleaner, water proof spray then reconnected it....never had a fault after that (until I stuffed the car in a hole !")

C5s of this age may have the old style fuze box that also acts as a comms hub for the ECUs ect.....many folks have found this to be the cause of strange report faults, worth checking with a new or known good one.


All I can think of, sorry if they have been tried before.