Hi,

I have a 2009 infiniti g37x.
I had an oil change and the next day when I drove my car I noticed the service engine soon light came on. I took it to the local auto store and the following error codes came up,
P0031
P1148
P3631
C1109

They were unable to pinpoint the exact reason for the errors and suggested I take it to the dealership. I would rather fix the issue on my own rather than get charged by the dealership 1 1/2 hours away. Can anyone please help?

 

Here's more details on 3 of the 4 codes, hopefully that will help. Couldn't find info on P3631
OBDII Code P0031 - HO2S Heater Control Circuit Low Bank 1 Sensor 1 | Nissanhelp.com
OBDII Code P1148 - Closed Loop Control Function Bank 1 | Nissanhelp.com
OBDII Code C1109 INFINITI - Battery Voltage | Nissanhelp.com
BTW, welcome to the site, hopefully these issues will be easy to resolve, G/L