this 01 s60 with just 130M miles is killing me with multiple codes

first a 420 suggesting catalyst system--------car running fine with that code/ refused to believe I needed another converter but willing to put one on since an universal that needs cutting and welding isn't that much----------still it said "system"which may not mean new converter necessarily

then a PO340 cam shaft position sensor bank 1-----------from what im reading that may explain it cutting out on me when driving and very difficult to start and with horrible gas milage

then just yesterday a po304----------misfire--------I put a new plug in and no help-------I switched the coil for the offending cylinder with another to see if I get a different code to confirm I need another coil/ no verdict yet

WHERE IS THAT CAM SHAFT POSITION SENSOR BANK 1-------------ive looked all over the internet and cant get a conclusive answer---one YouTuber says its on top of the transmission on drivers side best accessed taking the air cleaner housing and ive seen other comments its on the block / one said under the cover that accesses the coils and plug ( read that after I had already been in)

does the bank 1 suggest there is more than 1 on the car like the O2 sensor--------------is it possible that PO340 issue is causing the cylinder misfire

thanks for the help guys---if I can find it I can change it ---------------brand new to the forum

 

 

It is probably not the cam sensor. Those rarely go bad and they are simply magnetic probes. They can read through a lot of dust, oil and other film.

You need to stop driving this thing and check the timing belt condition. You may have moved a tooth.