Hello! CODE HELP 04 liberty 3.7 - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Liberty-KJ and KK

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 12-16-2014, 11:15 AM
New Member
 
Join Date: Dec 2014
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
noah.duram is on a distinguished road
Hello! CODE HELP 04 liberty 3.7

I've got codes p0171 p0172 p0131 are all these related to the o2 sensor?

Thanks

Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 12-18-2014, 06:52 AM
Frango100's Avatar
The beast from Brazil

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 7,413
Thanks: 18
Thanked 382 Times in 369 Posts
Rep Power: 529604
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: Hello! CODE HELP 04 liberty 3.7

P0131 = O2 sensor 1 low voltage.
P0171 = system lean, bank 1.
P0172 = system too rich, bank 1.
The first code is telling that the O2 sensor voltage doesn´t go over 0.5 V for more then 2 minutes. This can be due to a lean mixture, or a faulty O2 sensor. A leak in the exhaust manifold or manifold gasket could draw in fresh air and fool the O2 sensor, causing the PCM (powertrain control module) to add more fuel and when this passes a certain limit, it will set the P0172 code.
So i would start checking for any exhaust leak first. Also check the O2 sensor wires if they are not touching a hot exhaust part and shorting out.
If that seems to be ok, then most probably the bank 1 upstream sensor (1-1) is faulty.
There could eventually be a problem with low fuel pressure (pump/regulator/filter) or plugged cat, but that should influence bank 2 as well.
If you have a scanner which shows live data, you can see the O2 sensor voltage. It should change constantly from 0.1 to 0.8 V on a good sensor, but any other problem causing the system be lean, will make the O2 voltage low.
But if you see the bank 2 upstream sensor (2-1) working properly, then most probably the 1-1 sensor is faulty.
If you have 100 K miles on it and the sensors where never changed before, then it would be a good idea to change both upstream sensors. They become laisy over time and cause the mpg to go down.
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
OBD code P2667 Input Speed Sensor code Greg.garvin@gmail.com Troubleshooting/Problems Discussion 1 08-19-2012 02:51 AM
OBD code P2667 Input Speed Sensor code Greg.garvin@gmail.com Trouble Shooting/Problems/Service 0 08-18-2012 09:10 PM
Liberty Trouble code issues ozzy36 Liberty-KJ and KK 0 08-11-2012 05:05 PM
New Member 2002 Jeep Liberty P0500 VSS code mulliganstein New Members - Welcome! 9 05-24-2011 03:03 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:10 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.