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iTrader: (6)

I had this grinding noise at acceleration (20mph to 45ish).

The SES light came on, The code was for system lean bank 1, so i replaced the 02 sensor.

For 2 days there was no grinding noise, so i thought problem solved.

Today i noticed same noise but its less.

Is the other 02 sensor possibly be on its way out?

Thanks fellas.