2002 Infinti Q45 with codes p1122, p0430, p0171 and p0355

Question

my car with a check engine po430 went off for a couple of months than po171 code came up i ( turn that off) soon 2months later again p1122 and p0355 would one could be causing the others to trigger. i kno i might need a cat conventer soon, but now my exhaust is really loud now and in the winter. aslo my car just the other day shut off at a light...explain to wat might e happening...plz thanks

Answer 1

Three different codes for different problems, the codes P0171 and P0430 may be related. You just must tackle them one by one.

P1122 INFINITI - Electric Throttle Control Performance Problem
Read more: https://www.autocodes.com/p1122_infiniti.html

P0430 INFINITI - Catalyst System Efficiency Below Threshold Bank 2
Read more: https://www.autocodes.com/p0430_infiniti.html

P0171 INFINITI - Fuel Injection System Too Lean Bank 1
Read more: https://www.autocodes.com/p0171_infiniti.html