I cleaned out the dirty connector apparently going to O2 sensor and I have CEL on as soon as the car warms up, disconnected ground for 20 sec still CEL comes on. I got the error code 2342 by check engine light method.

By the way I just had the spark plugs changed and I have bad wires which I am waiting for the new ones to arrive.
Also I have this noise coming from the driver side of engine as I accelerate it gets lauder, it should be some valves...

I just cleared the codes by shortin g the two pins close to the driver. the CEL is gone for now !