Hello, I recently changed the 4 oxygen sensors, sparks, motor oil and filter, the MAF sensor. Now the engine has this weird tick sound that only dissapears when the transmission is in parking. For reference I attached a video. I use the vehicle daily and runs perfectly except for that specific sound.

 

My bet is exhaust leak.

 

2nd exhaust leak. use a shop vac to blow air into the tailpipe and spray soapy water on the exhaust junctions.

 

Hey everyone, thanks for the responses. I discovered that the issue is that both catalysts are damaged.