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DIY : Downstream Oxygen O2 Sensor replacement

139K views 73 replies 32 participants last post by  Daijoubu 
I have 1999 Camry LE and has CEL ON with code P0141.

The O2 Sensor was replaced recently however did not help it. Car feels wobbly when driving at higher speeds.

What do you think might be the reason?
 
Car passed emission with flying colors except for slightly high NO PPM (312 out of 450 in Ontario).

Car wobbles somewhat like boiling tea kettle when running at over 80-90KMs

Does these 2 things give any hint?
 
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