turbochild

So as some know I bought a skoda octavia vrs that had a oil light on due to a level sensor it had good history with a recent service etc but the engine light reared it's ugly head too.

Any way oil issue was a pain I done the strainer pick up pipe due to advice on here the oil pressure switch was pennies also the sensor I needed was a tad dearer anyway all changed oil light still on then someone suggested the bonnet switch so that got bridged and the oil light went out probs was that all along but at least I have piece of mind on the oil front!!

So the light got reset but came on mates reader wouldn't pick anything up so I called the AA never used my membership of years so he read the system and got these codes.

PO501 vehicle speed sensor
PO171 + system to lean bank 1

So I know what's wrong with it on paper but no idea what's involved in the repair or what the second fault even means.

Anyone any ideas what's involved thanks in advance

Ginge

PO171 would suggest the MAF sensor needs a clean....

Ginge

Rick

More likely an air leak.

Pressure test is first call of action.

turbochild

All boost hoses have been replaced with uprated silicon ones if that helps

jamie's

the standard recirc dump valves are famous for leaking and causing probs,
or if it has an aftermarket atmo dumpvalve then this can also cause probs on these

xr2wishy

iTrader: (2)

how's the intercooler?
our bora tdi threw up codes and issues for ages, turned out to be the intercooler had parted slightly and was dropping boost, but maf was reading much higher than engine receiving.
MAF is also a good shout, about Ł60 on exchange, andrew page is who i used for the last one.

GVK.

As Rick posted, the PCV hoses on these are very prone for leaking.

Find someone with a 'smoke tester' to check the intake system properly for leaks.

MAF sensors can fail but normally give lack of power, unplug and road test to see if MAF is bad. (will perform better with unplugged MAF)

Ross-Tech (vag-com/vcds) have a handy Wiki page with lists of faults and possible fixes.

http://wiki.ross-tech.com/wiki/index...5/P0171/000369


http://wiki.ross-tech.com/wiki/index...5/P0501/001281

As posted on one of your other threads, I'd highly recommend you getting yourself VCDS, even the lite version, can check/delete all your own codes, and look at live data, there's loads of help online with this with users worldwide.

turbochild

I've ordered a vag reader from eBay it hasn't arrived yet though should be here Monday cheers for the info though seems like a mine field at the moment. The car has intermitant boosting at the moment it comes and goes when the light is on but with the light clear it does boost so must be a safe mode thing maybe?

turbochild

This is a good point I was thinking of getting a forge split r valve but after reading up on them decided not too i will need to check the DV as I don't here anything from it have you any recommendations?

GVK.

VCDS does so much more than a simple code reader.

Intermittent boosting could be MAF, as said try it unplugged, it will probably put engine light on but if you're getting a code reader you can wipe it.

Just a case of working though the list of possible fixes.

Cheap stuff first of course!

turbochild

Tbh mate I haven't a clue the apprentice at work fitted the hoses while I was out on the road

turbochild

I was gonna try cleaning the maf first as I read they benefit from it at service intervals and I'm thinking this may not have been done what would be the best thing to clean it with? Do you have any ideas cheers for your help so far

GVK.

Isopropyl alcohol,can get it in aerosols, places like Maplins should do it.

http://www.maplin.co.uk/tape-head-an...-cleaner-29011

Some people use brake cleaner but that maybe a bit harsh.

turbochild

I'll go for the maplins suggestion lol don't wanna kill it if I can help it

I'm guessing I remove the maf give it a good spray allow to dry and refit or is there a bit more to it?