P0725/p0420 Nissan -murano

Question

Hey guys,I have an 03 Murano with a new catalytic convertor which came with the car so I don’t know if it is the original or aftermarket. I recently changed both the camshaft and crankshaft sensors, did a little wedding job on my exhaust pipe that was broken. The car is throwing code p0725 and p0420.For code p0420, it says bank 1(where is this?) but upon reading online, it looks like catalytic convertor or oxygen sensor. The car has 140k miles on it. Should I just reset it by disconnecting the battery and connecting it again and drive it for a while or should I try using a fuel injector cleaner. I have spent so much already on this car and really don’t want to spend anymore. Which is the cheapest way to do this? Please advice.

Answer 1

p0420 is bank 1 which is behind the engine (near the firewall) 

if there is an exhaust leak on the exhaust leak my cause the code to come on you will have to check for exhaust leaks.

 

p0725 might need to be looked at the a Nissan Consult computer (you can try to find a mechanic shop beside the dealer that may have one) or find a Nissan Specialist (you can check on yelp)