Do both oxygen sensors need to be replaced when replacing the catalytic converter? My acura integra has 172000 miles on it and needs a cat converter replaced.
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2001 Acura Integra Question: oxygen sensors
Answer #1patrick mannion from Greg Solow's Engine Room, March 13, 2012, 01:55Master
In principle it is good work practice to replace them to help the new cat work efficiently and last. Over time the sensors get "lazy" but it is all based on economics I guess! If the sensors are bad the computer in your car will flag them as bad but may not flag a marginal sensor.
Answer #2Anthony2998 from Tires & More Complete Car Care, March 14, 2012, 19:04Technician
Agree with the technician, it will in the end produce the best outcome from repairs