Ford Fiesta ST
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#563911 - 17/02/21 09:37 PM O2 sensors
YellowBadge Offline
MountooningTipster

Registered: 26/08/07
Posts: 11530
Loc: here
When car next in for it's 12month service going to get both sensors replaced, one I know is not actually doing much from the error code I got from my local car tuners, he thought they were dodgy just from listening to the idle, which is quite lumpy and bubbly, it was showing as running lean. I believe this means it will be fooling the ecu into making wrong adjustments. So am hoping it will be running even better and faster when done ? This is why if I leave it idling for too long the engine light comes on.

" P1131 lack of H02511 switch-sens lean"
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#563912 - 18/02/21 12:51 PM Re: O2 sensors [Re: YellowBadge]
kenny Online   content



Registered: 08/03/08
Posts: 11669
Loc: essex
Have you tried cleaning the sensors, maybe worth a try

Quite easy to do to get them out if you have the tool

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#563917 - 20/02/21 08:27 PM Re: O2 sensors [Re: YellowBadge]
YellowBadge Offline
MountooningTipster

Registered: 26/08/07
Posts: 11530
Loc: here
I don't have the tool nor the inclination to jack the car up and get under it these days, I'd guess these are really tight as well, best left for garage I think, the tuning guy showed me the live readings on his lap top and he said the sensor wasn't actually doing much.
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MR200 Stage 3 200PS
Evans Halshaw
Mountune Pro

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#563920 - 21/02/21 09:08 AM Re: O2 sensors [Re: YellowBadge]
kenny Online   content



Registered: 08/03/08
Posts: 11669
Loc: essex
fair enough mate thumbs

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