Po171 system to lean bank 1 fault code??

[150+]

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

Any ideas

[Agreeable Slick]

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.

[150+]

Would the decat I have on it make any diff

[Agreeable Slick]

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.

[nottyash]

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

[150+]

I take it it was split??

[150+]

Sorry didn't read the bottom line properly

Cheers mate will get it scanned again and Check the hoses