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AFR help?

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Old 09-02-2011, 12:58 PM
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AFR help?

i had a cell code on my ap it was p1153. i checked my afr on the freeway and at times it would go as high as 20.4 for about 30 seconds to about a minute. im kind of worried do you think i need to replace my 02 sensor?
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Old 09-03-2011, 11:40 AM
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my cell came on the second time with the p1153 now with two other codes p0171(system too lean(bank 1) p0420 (catalyst system efficiency below threshold. (bank 1)

does this mean i have a bad 02 sensor?
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Old 09-06-2011, 08:44 PM
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Sounds like a bad front O2 sensor.

-- Ed
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Old 09-06-2011, 11:13 PM
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I changed my o2 sensor and everything is back to working order to more cell code and o have better gas mileage now thanks Ed gor your input
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