skoda fabia 1.4 2005 failed MOT on emissions 

exhaust lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c))

i come home and read fault codes with vcds and got error code 

P1404 EGR System Basic Setting not Performed 

does anyone think this could be the cause for the emissions fail?

i been told by the garage to change both the lambda sensors but as they cost alot i need advice 1st 

thanks in advance 

Please post a photo of the emissions fail printout, with the lambda, CO, and HC numbers.

Exhaust leak seems quite likely to me, especially if lambda number is high.

Just now, Wino said:

Please post a photo of the emissions fail printout, with the lambda, CO, and HC numbers.

Exhaust leak seems quite likely to me, especially if lambda number is high.

Sorry not got the printout misplaced it 

Ask the MOT place for another copy, or just what the exact lambda number was. They must have the info.

Just now, Wino said:

Ask the MOT place for another copy, or just what the exact lambda number was. They must have the info.

Ok will go down later today and let you know and what I was told is if the egr basic settings not performed this will cause emissions test to fail is this correct? 

Don't know, but sounds unlikely. 

If you have VCDS why not do the basic setting?

Just now, Wino said:

Don't know, but sounds unlikely. 

If you have VCDS why not do the basic setting?

I just got the free vcds and can't afford to pay for licence I just changed my job so have to wait till end of month for my wages plus can't find any local people with vcds i check for exhaust leak as I can see the person before replaced the flexi pipe and put clamps on instead of welding it

Check further back too, a leak after the cats is not going to affect engine management but will affect the tailpipe lambda measurement.

1 minute ago, Wino said:

Check further back too, a leak after the cats is not going to affect engine management but will affect the tailpipe lambda measurement.

Just seen on the mot paper it has a advisories exhaust has a minor leak of exhaust gasses [6.1.2 (a) ]

54 minutes ago, Mobear said:

Just seen on the mot paper it has a advisories exhaust has a minor leak of exhaust gasses [6.1.2 (a) ]

This is likely to be your issue, you need to identify the leak and repair/replace the exhaust section.

If you still have issues then you need to investigate further, sometimes a fresh service and premium fuel can be enough to get it within range.

 

 

Just now, MATT0693 said:

This is likely to be your issue, you need to identify the leak and repair/replace the exhaust section.

If you still have issues then you need to investigate further, sometimes a fresh service and premium fuel can be enough to get it within range.

 

 

I have put new plugs,oil change new filters but I do think it's the leak now and is the p1404 egr system basic settings not performed will I have to sort this problem out for the mot as I do not have any lights on just shows up on vcds on error code thanks

19 minutes ago, Mobear said:

egr system basic settings not performed will I have to sort this problem out for the mot

I doubt it. 

 

1 hour ago, Mobear said:

Just seen on the mot paper it has a advisories exhaust has a minor leak of exhaust gasses [6.1.2 (a) ]

Buy an exhaust bandage, and use that to seal the leak short term. Long term you'll need a new exhaust section.

Just now, KenONeill said:

Buy an exhaust bandage, and use that to seal the leak short term. Long term you'll need a new exhaust section.

I just checked it and looks like it's got a tiny leak at the flex pipe which the previous owner got it replaced with a universal flex pipe the ones you  clamps on it's leaking from the end of the clamp and the back box got a tiny hole aswel 

11 minutes ago, Mobear said:

I just checked it and looks like it's got a tiny leak at the flex pipe which the previous owner got it replaced with a universal flex pipe the ones you  clamps on it's leaking from the end of the clamp and the back box got a tiny hole aswel 

Ok, you need a new flex pipe; they don't tend to respond well to welding or exhaust bandages, but a bandage should last years on the back section.

Just now, KenONeill said:

Ok, you need a new flex pipe; they don't tend to respond well to welding or exhaust bandages, but a bandage should last years on the back section.

Problem I got is i need it for the mot retest tomorrow and I oredered one online it will take the exhaust a week to get here plus local ones cost more than double the cost as online and the universal flex pipe is new it's just leaking from where the clamp goes on to. I just get new clamps hope that holds till new exhaust gets here as the clamps don't look like good ones and abit rusty. It did have the same flex pipe on last year mot and passed I reckon the clamps got loose 

Bodge it and scarper.

 

Worth checking behind the wheel arch liner at nearside rear, as you get a much better view of the back box with that removed; you might find a bigger hole there. Does it sound farty?

 

1 minute ago, Wino said:

Bodge it and scarper.

 

Worth checking behind the wheel arch liner at nearside rear, as you get a much better view of the back box with that removed; you might find a bigger hole there. Does it sound farty?

 

🤣 I will have to and no it abit loud but nothing major my previous car was like a tank 

I found someone with vcds and it won't adapt I got 2 egr valves and both the same I put some photos of the numbers

Can  you do 'output tests' on the engine ECU and see if you hear the valve clicking at the appropriate point in the sequence?

 

1 minute ago, Wino said:

Can  you do 'output tests' on the engine ECU and see if you hear the valve clicking at the appropriate point in the sequence?

 

Yes he did the output test and can hear it clicking 

I seem to remember this situation being discussed before, but can't remember the resolution, or even if there was one.  Is either valve a genuine Skoda one or a genuine Pierburg one (generally same thing)?

3 minutes ago, Wino said:

Can  you do 'output tests' on the engine ECU and see if you hear the valve clicking at the appropriate point in the sequence?

 

One more thing he said he could smell petrol or oil coming from the exhaust and abit of smoke it's white but as it really cold it might be condensation 

Just now, Mobear said:

it might be condensation 

Very likely to be that, yes, but it should stop smelling of petrol very soon after a cold start.

 

1 minute ago, Wino said:

I seem to remember this situation being discussed before, but can't remember the resolution, or even if there was one.  Is either valve a genuine Skoda one or a genuine Pierburg one (generally same thing)?

Think they aftermarket ones