Will these reading tell me which O2 sensor is bad? - Ranger-Forums - The Ultimate Ford Ranger Resource


4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 01-09-2014
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Location: Shepherdsville,Ky.
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Will these reading tell me which O2 sensor is bad?

2007 FORD RANGER 4.0L engine 112000 miles. Keeps throwing code P0420; Catalyst system below threshold Bank1.

CAT TEMP11 1152F
CAT TEMP21 1152F

O2S11 .335 V
O2S12 .135 V

O2S21 .700 V
O2S22 .350 V

What is Bank 1 and Bank 2

Thanks

Last edited by digger658; 01-09-2014 at 05:41 PM.
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Old 04-07-2014
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Got the same code. I wish someone would answer you.
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Old 04-09-2014
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ham, I had to replace both sensors on Bank1 before I could get the light to go out. Get your sensors at ROCKAUTO......half price.
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Old 04-10-2014
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check the sensors, but id also say the catalytic converter on driver side is shot
Bank 1 is driver side
Bank 2 is passenger
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