• Register

AutoCodes.com FREE Android App
Ask OBDII Question
Please write Make, Model and Year of your vehicle

Find local automotive repair shops in your area | AutoCodes.com Local
Need A Repair Shop?
Find local automotive repair shops in your area.
AutoCodes.com Shops

33,203 questions

19,373 answers

718 comments

22,020 users

Top Users

Reynaldo 8,835 Points
Carguy1 3,931 Points
G37driver 3,517 Points
OBDIITech 2,735 Points
OBDtech2 165 Points
corvette-78 127 Points
knowledge 1488 124 Points
Samat Bekov 117 Points
ptl 113 Points
sabtele 112 Points

P0420 code on a 2001 INFINITI -qx4

I have service engine soon light. Failed emission inspection and showed codes p1140 and p0420

Vehicle: 2001 infinity qx4 3500 v6
asked Mar 22, 2013 by anonymous

1 Answer

You should start by fixing the P1140 code. Sometimes the code is caused by dirty engine oil.

P1140 INFINITI - Intake Valve Timing Control Performance Bank 1

Read more: http://engine-codes.com/p1140_infiniti.html

P0420 INFINITI - Catalyst System Efficiency Below Threshold Bank 1

Read more: http://engine-codes.com/p0420_infiniti.html

answered Mar 22, 2013 by OBDIITech (2,735 points)

Related Information

Related questions

1 answer
2,031 views asked Aug 3, 2012 by anonymous
2 answers
250 views asked Jan 11, 2015 by anonymous
Home - About AutoCodes.com - Privacy Policy - Terms and Conditions - Copyright 2010-2016 AutoCodes.com

AutoCodes.com - HelpForCars.net - Infinitihelp.com - Nissanhelp.com
...