Egr valve

Stretch1432 · 23-01-2024 9:52pm #1

Hi iv a 2012 skoda octavia and i keep getting a P0403 fault code which is exhaust gas recirculation A control circuit. Had the egr cleaned before and wasnt cheap. Just wondering what the problem may be and how much would it cost to fix?

Whocare · 23-01-2024 10:11pm

I would Imagine new egr is needed if 2.0tdi there very expensive up around 1000 + euro

User1998 · 23-01-2024 10:44pm

Or a remap for €200 and you’ll never have an issue with it again

Stretch1432 · 24-01-2024 6:36am

https://www.boards.ie/discussion/comment/121662542#Comment_121662542

Ye she is 2.0 tdi alright. Thats a bit too expensive for me

Stretch1432 · 24-01-2024 6:37am

https://www.boards.ie/discussion/comment/121662727#Comment_121662727

Oh how does that work ? Is.it easily done ?

GPoint · 24-01-2024 5:44pm

Means ECU (engine control unit) is reprogrammed and not using EGR valve at all. Not sure if NCT ever check for this though…

Stretch1432 · 24-01-2024 6:06pm

Dont think NCTchecks for it yet but thats not saying they wont in 2/3 yrs

MarkR · 24-01-2024 7:31pm

There'll be a fire sale on modified diesels when that happens.

spakman · 24-01-2024 7:36pm

https://www.boards.ie/discussion/comment/121666386#Comment_121666386

Got same done on mine, seems logical thing to do as long as NCT don't start checking for it!

BlakeS94 · 24-01-2024 8:03pm

Car will pass NCT with EGR delete, its just commanded closed in all circumstances through coding, essentially "deleting" it but it's still attached to the engine and no way of being able to tell.

I believe getting the EGR deleted can be bad for DPF so both are usually done together.

Don't have any first hand information on that though so could be BS. Worth looking into maybe.

GPoint · 24-01-2024 11:58pm

This is what people do on a car approaching end of life when don’t want to spend on new egr or dpf. Risk is that if NcT rules change you won’t have more than a year from your money spent on coding it out , before you are forced to fix it properly.

Stretch1432 · 25-01-2024 7:16am

https://www.boards.ie/discussion/comment/121668392#Comment_121668392

Good point, however spending 1000 euro on a new egr is a bit excessive in my opinnion.

BlakeS94 · 25-01-2024 9:18am

If the NCT do bring in more strict rules surrounding emissions it'll only be for the most modern Euro 6 emissions cars.

Diesels only get smoke tested anyway

blue5000 · 25-01-2024 5:22pm

https://www.boards.ie/discussion/comment/121669000#Comment_121669000

What year did euro 6 come in?

BlakeS94 · 25-01-2024 5:35pm

Around 2014 I think

RINO87 · 26-01-2024 10:52am

There has been "talk" of NCT checking for deleted EGR/DPF for at least ten years now!! I can't see it being this year or next, they won't add to the current mess.

26-01-2024 11:22am

Defeating the EGR will probably take some load off the DPF since the exhaust will be running hotter and that means cleaner. Defeating the EGR should be a relatively easy job since it should be entirely software based, defeating the DPF involves physically boring the DPF and then altering the software as well.

A well functioning diesel will be clean burning and not present any emissions issues, but the problem is by the time your EGR or DPF start playing up there is generally an underlying engine issue causing it which means that defeating either the EGR and/or DPF will generally result in significant exhaust emissions - which will then be fairly obvious to any NCT tester. A smokey engine with the DPF in place will not smoke out the exhaust it will just be in a perpetual DPF regen cycle which will piss diesel away at an alarming. rate.

Stretch1432 · 26-01-2024 11:29am

If you have to phsically remove the dpf would this not be checked in the NCT centre?

https://www.boards.ie/discussion/comment/121674913#Comment_121674913

User1998 · 26-01-2024 11:31am

https://www.boards.ie/discussion/comment/121674950#Comment_121674950

Its not physically removed, only the insides of the DPF are removed and the outer shell remains.

26-01-2024 11:31am

https://www.boards.ie/discussion/comment/121674950#Comment_121674950

No - they have no way of doing that since it is a sealed unit, they literally bore out the matrix and replace the housing back so nothing is obvious on the outside. What they would be looking for is soot at the end of the exhaust - a sure sign that the DPF has been removed and a reason to fail you.

Stretch1432 · 26-01-2024 1:58pm

https://www.boards.ie/discussion/comment/121674960#Comment_121674960

If its removed can we reinsatlled at a later time or will it be too damaged

MarkR · 26-01-2024 6:26pm

Nct doesn't fail for sooty looking cars. Yet anyway!

27-01-2024 7:30am

https://www.boards.ie/discussion/comment/121677604#Comment_121677604

It's a legal requirement to have a functional DPF (if one was fitted at the factory) so any evidence that you have removed it is a reason to declare the car unfit to drive. It may not happen very often but the law allows a car with a DPF removed to be declared not fit for use and illegal to drive.

MarkR · 27-01-2024 10:41am

But to prove it, wouldn't they have to dismantle the exhaust, which is not something they can do?

User1998 · 27-01-2024 10:47am

https://www.boards.ie/discussion/comment/121680464#Comment_121680464

Yes, it will never be the case where they fail people because they have soot in their exhausts. Its not conclusive enough

BlakeS94 · 27-01-2024 11:53am

https://www.boards.ie/discussion/comment/121675933#Comment_121675933

No, the filter inside gets shredded to pieces usually by means of a very long wooden drillbit, and taken out.

Once it's done it's done. No turning back unless you buy a new DPF

ofcork · 27-01-2024 9:54pm

Got mine cleaned 2 years ago and been fine since.

Spook_ie · 28-01-2024 11:36am

https://www.boards.ie/discussion/comment/121662542#Comment_121662542

https://www.skodapartsireland.ie/product/egr-valve

€460 plus fitting

BlakeS94 · 16-02-2024 12:14pm

My car just passed NCT with DPF/EGR deleted no issues.

thefa · 29-04-2024 8:50am

Don’t want to start a new thread but have a similar issue. 2011 Leon which I brought into the garage and was tilde the EGR valve needs replacing plus the glow plugs. Been quoted €1500 + VAT. Puts it down to using only VW parts as aftermarket parts tend to have issues.

Have rang a couple of garages and the price seems in the normal range. Are my only real options to go through with it or have it removed/remapped? See websites offering cleaning but presume it is beyond that point?

29-04-2024 9:00am

I would suspect that the glow plugs are the reason your egr clogged in the first place. To not get it done at the same time as your egr would be a false economy. The glow plug replacement is likely a substantial part of the overall bill as they can be a real pain to access and new ceramic glow plugs are not cheap. Failure analysis at VW will have identified this as a root cause of EGR failure and a service not will have been sent out to all service centres.

slystallone · 25-11-2024 9:23pm

https://www.boards.ie/discussion/2058332936/egr-valve

What did it cost to get cleaned?

slystallone · 25-11-2024 9:29pm

https://www.boards.ie/discussion/2058332936/egr-valve

What causes EGR valves to get clogged?

Audioslaven · 25-11-2024 11:41pm

https://www.boards.ie/discussion/comment/122884462#Comment_122884462

Exhaust fumes - EGR (Exhaust Gas Recirculation) - recirculate a portion of the exhaust gas from the engine back into the combustion process

slystallone · 26-11-2024 10:50am

https://www.boards.ie/discussion/comment/122885236#Comment_122885236

So is it a part that gets dirty by default and should be regularly cleaned or does it only get dirty and clogged as a result of another issue?

Audioslaven · 26-11-2024 3:54pm

https://www.boards.ie/discussion/comment/122886258#Comment_122886258

Well it depends. For example my Honda has 310K KM on it and I never had to clean it, no issues or anything. I don't want to either as it is a PITA to get to. In the 1.6HDI engine, the EGR would get dirty and would need to be taken out and cleaned as the soot would stop it from closing or opening properly and you would get dead spots in acceleration and possibly an engine light.

It is usually straight forward to clean but getting to and taking them off is the hard part imo.