GolfGTIforum.co.uk

Model specific boards => Golf mk4 => Topic started by: 150+ on 22 July 2013, 07:53

Title: Po171 system to lean bank 1 fault code??
Post by: 150+ on 22 July 2013, 07:53

Just plugged my car in to my pals computer and this came up have done some searching not found much

Any ideas

Title: Re: Po171 system to lean bank 1 fault code??
Post by: Agreeable Slick on 22 July 2013, 12:59

Lambda sensor is playing up pre cat.

Two options,

1) take it out and thrash the granny out of it for a bit to make sure that it isn't just covered with crap. (google italian tuneup)

2) Swap the dodgy front sensor out for something that is either proven to work or a new one and off you trot.

Title: Re: Po171 system to lean bank 1 fault code??
Post by: 150+ on 22 July 2013, 13:43

Would the decat I have on it make any diff

Title: Re: Po171 system to lean bank 1 fault code??
Post by: Agreeable Slick on 22 July 2013, 13:50

Well, have they / you put the lambda back in after swapping? They are a bit fragile so you could have just knackered it by banging it around when swapping it out.

Title: Re: Po171 system to lean bank 1 fault code??
Post by: nottyash on 28 July 2013, 09:34

I had the exact same problem. It was intermittent.
We presumed it was either a breather hose or an o2 sensor.
After testing the sensor on a diagnostic tool it was functioning fine. Then checking hoses we found one split.

I replaced it with this one, so it wont happen again:
http://www.ebay.co.uk/itm/150977908303

Title: Re: Po171 system to lean bank 1 fault code??
Post by: 150+ on 28 July 2013, 09:40

I take it it was split??

Title: Re: Po171 system to lean bank 1 fault code??
Post by: 150+ on 28 July 2013, 19:23

Sorry didn't read the bottom line properly :whistle:

Cheers mate will get it scanned again and Check the hoses