Ford Scorpio Forum - Print Page


    
      
        Ford Scorpio Forum
        (https://www.fordscorpio.co.uk/cgi-bin/yabb/YaBB.pl)
      

        General >> Problems >> mot failure, advice need
        
(Message started by: thesnake505 on Sep 27^th, 2010, 7:31pm)

Title: mot failure, advice need
Post by thesnake505 on Sep 27^th, 2010, 7:31pm

hay guys, first time posting,
i own a 1997 ford scorpio 24v v6,
it has recently failed its mot most of which isnt a problem,
however it failed on emmisions and im unsure what to do the co levels are high, but the hydrocarbons are normal, this makes me beilve its running rich,

originally the garage told me it needed a pair of cats, however i plugged it in to the obd2 set up i have, its very basic, give fault codes, but cant give lambda sensor reading

the code it gave was
P0174 System too Lean

which after a quick search on the internet bought me to this page
http://www.fordscorpio.co.uk/maftest.htm

i have cleaned the maf but didnt so any thing, am unsure of my next step, can this cause the co levels to be high on the car? or is a pair of cats the way forward?

cheers for any help :D

Title: Re: mot failure, advice need
Post by thesnake505 on Sep 27^th, 2010, 11:47pm

also, quick question, is the maf sensor on the mondeu 24v the same? or any other car that i can use one off? cheers

Title: Re: mot failure, advice need
Post by Jonnycab on Sep 28^th, 2010, 12:29am

P0174 system too lean - bank No 2, points towards the post cat sensors....http://www.fordscorpio.co.uk/codes.htm.....so it's possible the cats could be at fault :-/

Have you checked the plugs to see if they shows signs of running lean ? ...this may show the problem as being pre-cat :)