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[birdman]

Omega has driven for a week (200miles)  with no problems or mil light,today the mil light (not spanner light) came on,still driving like a gem,read code to be P0170 fuel trim bank 1,cleared ok, i know what the code means but why is it coming up? there are no vacuum leaks or exhaust leaks,car has had new oxygen sensors,maf sensor and cam sensor (all genuine vaux)

[ndmv6]

i had the exact same problem with mine,i changed
cam sensor
air flow meter
both lambda sensors
new exhaust manifold and gasket,as old one had cracked
new rocker cover gasket,as oil had soaked the plug wells.
then eventually,fitted a new cat,
cleaned out breathers and throttle
a very expensive problem solved.

[birdman]

cheers for that,ive done everything you have except the cat! shes been ok today!

[JamesV6CDX]

I'm not far away, and can read live data, birdman ...

[birdman]

mil light on again code P0170,freeze frame data as follows
DTCFFRZF  P0170
FUELSYS1   CL
FUEL SYS2  N/A
LOAD-PCT(%)  44.3
ETC(.C)  88
SHRTFT1(%)  14.1
LONGFT1(%)  10.2
RPM  2251
VSS(KM/H) 48

Can anyone tell what is causing this code to come up.I can find no vacuum leaks!!

[birdman]

does anybody know if the fuel trims are high on my previous post,if so what causes it?,ive tried everything!!!!

[feeutfo]

mil light on again code P0170,freeze frame data as follows
DTCFFRZF  P0170
FUELSYS1   CL
FUEL SYS2  N/A
LOAD-PCT(%)  44.3
ETC(.C)  88
SHRTFT1(%)  14.1
LONGFT1(%)  10.2
RPM  2251
VSS(KM/H) 48

Can anyone tell what is causing this code to come up.I can find no vacuum leaks!!

No.
 SHoRT term Fuel Trim 14.1%
 LONG term Fuel Trim   10.2%

... Are missing the all important + or - to indicate rich or lean trim level. It's the long term figure that's important, as it takes an average over a period.

As I understand it, if it was +10.2% for example, that would mean it was adding injector duration due to a lean condition. And obviously vice versa for a minus figure.

Although coming from a v engine, and seeing the light tripped from + or - 24% and above, those figures don't look massively ott imle...

but you really need some input from one of the tech2 guys on here tbh... :-/

[birdman]

thanks,it doesnt show + or - on my Autel MS509,but assume its + as sometimes the short term ft shows a minus sign.

[feeutfo]

thanks,it doesnt show + or - on my Autel MS509,but assume its + as sometimes the short term ft shows a minus sign.

If that's the case then it's adding fuel as the lambda is seeing a lean condition.

First thought Air leak, but there are non you say...? Tried the carb cleaner trick? Does it hunt?

[birdman]

ive had a really good look around and all vac pipes seem sound,ive cleaned out the throttle body,when you put your foot down it does seem to be hesitant,idles perfect!it had a genuine maf and both lambda sensors last year fitted by previous owner.

[feeutfo]

Could be anywhere from post Maf.

[Proz]

I suffered this problem on my 2.2 petrol for a long time ... im trying to find the posts i had on it but the search thing is not finding them .
Live data readings would be a real bonus if you can find someone with Tech II or "My Naff Code Reader" etc and i could compare them with my current readings ( no mil lit ) to see whats different .
Im 99% positive mine was cured with new maf however ,  but you say you have changed it so id be interested in comparing live data .
HTH

[birdman]

Hi all,
Fuel trim fault P0170 still activating randomly,freeze frame always shows short term fuel trim as 14.1% and long term fuel trim as 10.2%,its driving me mad and running out of ideas! does anyone have any ideas?

[pscocoa]

have you refuelled since problem started or maybe just before problem started (and have you refuelled since??)

[birdman]

ive refuelled a number of times,just changed the fuel filter which looked like it had never been changed! 140k too!