EGR & Lambda DTCs

[Funky Diver]

Originally Posted by cheshired5

buy a used genuine MAF ..... My last was £15

Alternatively... a new aftermarket one for £22. Installed this last week and it works a treat. Same size, etc as OEM.

[cheshired5]

Originally Posted by Funky Diver

Alternatively... a new aftermarket one for £22. Installed this last week and it works a treat. Same size, etc as OEM.

I won't derail the thread with my thoughts on generic MAFs
If it works for you, good for you.

[5cilinder]

Originally Posted by cheshired5

A MAF is a sensor and like any sensor, it can and should be tested before condemning......... unless they're the ones paying for the bad guesses.

Told him that several times before the purchases of other items as well in the same impatient parallel/copy thread in the diesel section

Originally Posted by A lex

How valuable the 'advice' is remains to be seen.....

At least 330 euro's (ex battery)

Originally Posted by cheshired5

I'd be interested to know how egr gases can make their way in reverse and through a spinning turbo to foul a MAF.
I think you've been fed a very expensive bit of guff.

And he is still booking his car with those muppets next tuesday
But they are from volvo ,cant be wrong

[A lex]

Oh no. You made it here.

Mr angry! Are you following me around the site? That seems a little sad.

If replacing the 'affected sensors' doesn't fix it, where do you suggest I take the car for repair? The magic Volvo sky fairies?

Independant Volvo specialists don't exist where I live. It's DIY or the dealer. I've done what I can with DIY so now it's time for the dealer and their specialist equipment. The first thing the dealer would do is change the MAF and the o2 sensor, so what have I lost?

I asked you already in the diesel section to be amicable. Theres no need for the insulting or ****take posts. I'm not sure why my problem has particularly wound you up, but give it a rest.

[5cilinder]

Originally Posted by A lex

Oh no. You made it here.

Mr angry! Are you following me around the site? That seems a little sad.

You too
http://www.volvoforums.org.uk/showthread.php?t=233440

Originally Posted by A lex

Independant Volvo specialists don't exist where I live. It's DIY or the dealer.

Not true, there are plenty of volvo specialist in holland, i know because i live there too if they are any better than the dealer in logical thinking i wont garuantee
But youre a bit lazy like the egr cleaning crud suckup by the engine

Originally Posted by A lex

I've done what I can with DIY so now it's time for the dealer and their specialist equipment. The first thing the dealer would do is change the MAF and the o2 sensor, so what have I lost?

I asked you already in the diesel section to be amicable. Theres no need for the insulting or ****take posts. I'm not sure why my problem has particularly wound you up, but give it a rest.

The only "insults" i see is that several times you are told by several helpfull members what to look for and that aint replacing batteries and sensors at random because they are thrown up as a code with a same timestamp (checked that ?), but you turned to the servicemanagers and volvofairies anyway

[A lex]

There are no Volvo specialists close by to where I live that I know about. I think the closest is probably Arnhem, which is 90mins driving minimum.

VIDA does not produce any timestamps for the DTCs. I have checked the fuses for the sensors, they are all OK and not on common circuits.

The EGR clean is a matter of YOUR opinion. I haven't got the time or patience to do a full 5hr EGR clean on the euro4.

The alternator test produces perfect results in VIDA.

Low batteries can produce CANBUS errors. So for me, it was worth it to change what I knew to be an old and low battery. I can now rule that out from the possible list of causes.

In the thread in the diesel section you rant on about my 'Russian mafia suv' and **** geartronic gearbox, I'm not sure why?

Do me a favour and just give it a rest. Your input (correct or otherwise) is no longer welcomed. Please do your best to respect this request.

Whether you think you are being rude or not, I can tell you that you come across as rude and aggressive. I'm not sure why, its not needed and a pretty strange attitude to have on what is almost universally a friendly and helpful forum.

[5cilinder]

Originally Posted by A lex

There are no Volvo specialists close by to where I live that I know about. I think the closest is probably Arnhem, which is 90mins driving minimum.

Good garages dont have to have a volvo badge its not elite technic all the brands make use of the same principles
In fact some good old school technicians can do some good trouble shooting for less money than those flowchart replace anything dealer monkeys

Originally Posted by A lex

VIDA does not produce any timestamps for the DTCs. I have checked the fuses for the sensors, they are all OK and not on common circuits.

You can retrieve timestamps and im not suprised if they are the same

Originally Posted by A lex

The EGR clean is a matter of YOUR opinion.

Ofcourse , but also a fact that your "clean" does more harm than good

Originally Posted by A lex

I haven't got the time or patience to do a full 5hr EGR clean on the euro4.

Fair enough , but doesnt make my opinion wrong

Originally Posted by A lex

The alternator test produces perfect results in VIDA.

"perfect" Youre sure?

Originally Posted by A lex

- Alternator function tests as OK (but only just)

Originally Posted by A lex

Low batteries can produce CANBUS errors.

Not with a running engine with a good buffering altenator

Originally Posted by A lex

In the thread in the diesel section you rant on about my 'Russian mafia suv' and **** geartronic gearbox, I'm not sure why?

Because it looks like one with the black windows?
Be honest the geartronic IS horrible , no filters ,overheating they fail a lot

Originally Posted by A lex

(a £650 Turkish drug dealer W140)
http://www.volvoforums.org.uk/showth...sh#post1468145

Why the stereotyping here? and pointing at me ?
I'm not sure why?

[CTCNetwork]

Hi,

Can it. Both of you!

Des. . .

[A lex]

Ive changed the MAP (boost) pressure sensor this afternoon.

I really thought I had solved it, as I did a good 20km test drive and tried to 'provoke' it the whole time, all with no errors.

Then, 500m from home it popped a code. I was in 5th gear at about 30mph, foot to the floor and then after about a second of boost there's a dip in power and the code. This time MAF signal too low, but no Ho2S error.

This has me wondering whether its something boost/turbo related?

After driving to work and back last night im also reasonably happy that its possible to drive around the problem. If I stick to about 1/2 throttle then it doesn't seem give any issue.

So im not working on it any more now, i've changed what I can and ill have to leave it up to Volvo next week.

[diro]

Originally Posted by A lex

Ive changed the MAP (boost) pressure sensor this afternoon.

I really thought I had solved it, as I did a good 20km test drive and tried to 'provoke' it the whole time, all with no errors.

Then, 500m from home it popped a code. I was in 5th gear at about 30mph, foot to the floor and then after about a second of boost there's a dip in power and the code. This time MAF signal too low, but no Ho2S error.

This has me wondering whether its something boost/turbo related?

After driving to work and back last night im also reasonably happy that its possible to drive around the problem. If I stick to about 1/2 throttle then it doesn't seem give any issue.

So im not working on it any more now, i've changed what I can and ill have to leave it up to Volvo next week.

I would not rely on Volvo. The only good thing that if they fail to cure a problem - you can complain. Those guys are not super engineers or something. They do everything by book/troubleshooting. If they will cure your problem - prepare your wallet to open widely and put cash on the table lol . A bill will be massive.

Now... eco friendly environment supporters, green peace supporters should not read ahead.
My suggestion to you: get DPF gutted and properly reprogrammed also disable EGR (just need to make sure EGR is in closed position). You can shoot 3 rabbits (DFP, EGR and remap) making only 1 shot. Once that will be done it will be easier, much easier to cure a problem and trace boost leak problems if there are any. I got myself trough this before but I didnt buy sensors like you did. Vida was my friend and some knowledge.

Lambda sensor fault, like MAF also can be related to boost issues.

If turbocharger is ok there are not so many places where the boost can leak. There are 3 general places:
1. gasket between tcharger and resonator(silencer)
2. gasket resonator/high pressure pipe
2. intercooler

And if you have boost leak, there always will be black smoke more or less it depends how bad leak is. At the moment you cant see that because of the dpf

i had big problems with resonator gaskets before so ended up buying aftermarket silicone hose as resonator replacement. Problems gone. Very happy.

Good luck