wide boy Posted August 29, 2012 Report Share Posted August 29, 2012 so guys and gals im having a slight issue with that stupid little light we all hate to see on are dashboards no not the petrol allthough i do have that as well haha;). im talking about that engine management light. so guys iv got an obd stick and it poped up saying system 1 bank 1 running lean any ideas guys on how i can sort this its driving me mad its all well and good turning the damn thing off but it keeps coming back Link to comment Share on other sites More sharing options...
J03 Posted August 29, 2012 Report Share Posted August 29, 2012 Sounds like a bad pre-cat o2 sensor mate. However, before spending any wonga on a new one & if you haven't already done so, you could try cleaning the MAF first to see if that cures it. Link to comment Share on other sites More sharing options...
wide boy Posted August 29, 2012 Author Report Share Posted August 29, 2012 Ill have a go at cleaning the maff i think i need a new hose for the air box aswell And i know this is a bit off topic but i seem to be losing water out of the rad but cant see any water leaks on the pipes anywhere Link to comment Share on other sites More sharing options...
J03 Posted August 29, 2012 Report Share Posted August 29, 2012 Ill have a go at cleaning the maff i think i need a new hose for the air box aswell And i know this is a bit off topic but i seem to be losing water out of the rad but cant see any water leaks on the pipes anywhere Could be an airlock in the cooling system mate, but most likely the rad is shot. 99% of the time they go at the lower left corner (facing car) Whip the under plastics off on that side & have a gander, if there's coolant pissed all over the sump then it's the rad. Link to comment Share on other sites More sharing options...
armoredfist2002 Posted August 30, 2012 Report Share Posted August 30, 2012 (edited) bank 1 and 2 sensors are usually the sensors in the exhaust, do you have a code to go with the above? It has been said over the last few weeks that the exhaust sensors are serviceable items and will need changing around 60k - 80k miles As for loosing coolant could be the waterpump, but as Joe said usually a hole in the bottom corner of the rad where it's rotted away Edited August 30, 2012 by armoredfist2002 Link to comment Share on other sites More sharing options...
edwardio Posted August 30, 2012 Report Share Posted August 30, 2012 Bad news this. Yep rads are prone to fail on these. Been there done that & know plenty of others have. As for the O2 sensors, yep it is advised by many in the industry Bosch, febi & others that they should be changed between 60k-80k as said above. Basically the sensor degrades or ages if you prefer over time due to the environment that it lives in. Link to comment Share on other sites More sharing options...
wide boy Posted August 31, 2012 Author Report Share Posted August 31, 2012 Cheers for the help guys ill have to try n locate the sensor and replace it any ideas on how much they r ill get under the car sunday and check the rad see whats goin on water pump sounds pricey Link to comment Share on other sites More sharing options...
armoredfist2002 Posted August 31, 2012 Report Share Posted August 31, 2012 Sensors are usually aroud £60 Water pump I paid £48 for mine from a mechanic round the corner from where I work, you can get the same one on ebay now for about £38, not too bad a job too do yourself. Radiator is a bit more of a pain to do, these are around £150 Link to comment Share on other sites More sharing options...
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