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Old 04-03-2014, 09:50 AM   #1
PAMUSTANGMAN
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P0157 2000 Yukon XL2500

I have a code that just started popping up on my 2000 Yukon XL2500 with 93K. I know I have a spot on the side of the Muffler that was rotted out and patched by the previous owner. My question is would an exhaust leak that far back in the system throw off the O2 Sensor?
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Old 04-03-2014, 01:50 PM   #2
maxwedge
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Re: P0157 2000 Yukon XL2500

No, the leak would normally have to be before the sensor.
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Old 05-18-2014, 08:32 PM   #3
thzpcs
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Re: P0157 2000 Yukon XL2500

Any idea of your cats are still good or not?
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