Today after completing tune up on 03 5,7l Ram 1500 after couple minute running engine start to run funy and got engine code po138 o2 sensor bank 1 sensor 2 high voltage. wtf?
soon as see high voltage didnt think something wrong with sensor so go over the job take back intake check all plugs and injector cables check plug cover re torque 16 plug and coils again i check all electrical connectors clean the ground points and put everything back and run the engine no code no anything runs like normal which is good for me)
But however i guess when you have po138 code on this trucks it should be elctrical shortage instead of blowing your cash on new sensors is a right way i guess.
i still dont know what cause the code and what fix it back but on second check basically didnt do anything different than first one)

 

Well you could always buy a new O2 as they are cheap and likelyhood is being the age and mileage you have, its time for one anyway. Other than that I would check for any crack in the exh manifold or broken header bolt that might be leaking air

 

This morning just complete my first 100 miles runs good no light
Throttle respondes much better exhaust sounds and smells like used to be no problem water start to drip again and no fuel like smell smoke come clear after reach normal operation temp.
I think that cables under ignition cables didnt insulated well if u dont go easy on them make a short at some points while changing ignition cables i guess u have to be very gentle when working on thoug truck like this)