Question about 2000 Ford Focus

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There are no codes showing, my check engine light is off, and my truck is still running rich. I have already change the o2 senser and it idells up really high when you start it.

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Check for a vacuum leak around the intake manifold area.It could also be something to do with any of the sensors mounted on the intake manifold,although they should set a trouble code.Manifold air pressure sensor,throttle position sensor,mass air flow sensor,idle air control sensor,etc.Take some brake cleaner or WD 40 and while engine is idling,spray around the intake manifold.If the engine speed goes up or down in relation to your spraying,that's the area of the vacuum leak.Good luck.

Posted on Jul 26, 2008

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O2 senser trouble


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P1151 means a lean bank 2 O2 sensor
P1152 Means a rich bank 2 O2 sensor
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I would check your fuel injector for fouling
When they foul the will develop a drip
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If this helps please give me some feed back
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O2 sensers


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Did you change both O2 sensors?

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