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Q: catylitic convertor problem after an oxygen sensor makes check engine light
on 2002 Toyota Camry

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
after the check engine light comes on and the code says catylitic convertor can this be caused by the number 1 oxygen sensor and the number 2 oxygen sensor being bad
No car image 94a1663db56199c5353592009e34aaa51078a2469bed068bb8d6f0ba43accf97
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The #1 sensor mostly gives the ecu a signal for adjustments to fuel mixture.
The #2 sensor was installed in 96 and later vehicles to monitor cat efficiency.
thats why 96 and later vehicles are tested obd and 95 and earlier are tail pipe tested.
If you have access to a multi meter and can attach it to the signal wire of the o2 sensor.
Check that the voltage is steady above 500mv if the signal moves above and below 500mv, that is the sign of a bad cat. Tht car must be at full operating temp.
When the signal moves to much the computer considers the cat no good.
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