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Mad Scientist
494 Posts
Discussion Starter · #1 ·
Has anyone had an O2 sensor go bad overnight?

Everything was good last time I drove the car. Well Almost....but there were no O2 issues. :D Anyway I started it today and everything is indicating the sensor is dead.

Cross counts not counting
O2 mV swinging around under 100
Code 44
BLMs topped out
Idling way rich as indicated by the WB O2

Never had one go from good to dead just like that without slowing down on the cross counts first.
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