Dtc 420 and 430 2004 qx56

[MikeTest]

Three weeks ago had fuel pump replaced. Following day 420 and 430 codes started appearing. Sometimes one, sometimes both. Having a hard time believing this is a coincidence. Any connection?

[marctronixx]

mike, do an ECM reset procedure. could be improper air/petrol mixture ratio. have the local auto zone, etc reset the code (if you cant reset them yourself. I can. I use torque with a tablet and a bluetooth obd port dongle).

if it comes back on in a few miles, it could be faulty cats.

google NISSAN titan ECM reset procedure and you will find it easily. this works fine on the q. I use this on my 2012 q.