• Register
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

32,600 questions

18,625 answers

690 comments

21,640 users

Top Users

Reynaldo 8,550 Points
G37driver 3,517 Points
Carguy1 3,480 Points
OBDIITech 2,727 Points
OBDtech2 165 Points
corvette-78 127 Points
knowledge 1488 124 Points
Samat Bekov 117 Points
ptl 113 Points
sabtele 112 Points

P0171 code on Mazda 6

I have a Mazda 6 with 3.0 liter engine. Engine light came on week ago checked with code reader it goes up P0171 and P0174. Took off MAF sensor clean it clear code. When I drive over an hour engine light comes back on with same code. Let car sit at least 8 hours engine light turns off. Drive it for an hour engine light turns back on. Car runs fine no problems with performance of car. Need up with this problem.

Vehicle: 2003 Mazda 6 engine size 3.0 liter
asked Sep 20, 2013 by Daniel

1 Answer

P0171 Fuel trim (RH) too lean

P0174 Fuel trim (LH) too lean

Lean condition , check the MAF air duct, this duct has a tendency to tear especailly at the bottom part going to the throttle body, You are also going to have to check fuel pressure the specification are 63psi-73 psi
answered Sep 20, 2013 by Reynaldo (8,550 points)

Related questions

1 answer
46 views asked Dec 31, 2015 by Rohan
1 answer
52 views asked Nov 8, 2015 by Diana C
Home - About AutoCodes.com - Privacy Policy - Terms and Conditions - Copyright 2010-2016 AutoCodes.com

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