Bypassing the O2 sensors? - Nissan Frontier Forum
Reply
 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 03-13-2010, 07:06 AM
Shift_Enthusiast
 
MEDEL514's Avatar
 
Join Date: Mar 2006
Location: Kaiserslautern, Germany
Posts: 361
Thanks: 0
Thanked 20 Times in 9 Posts
Feedback Score: 0 reviews
Bypassing the O2 sensors?

I've been having an exhaust problem on my 2006 Nissan Frontier. I keep getting an erroneous P2A03 code on my truck which the dealer was telling me that its an O2 sensor. But I have changed all 4 of the O2 sensors since this code has came up and the problem has still came back, and I'm getting horrible gas mileage. I have an 06 and my warranty has run out, so I'm on my own on this one.

Since I've replaced all 4 O2 sensors, I can rule those out as being the problem. Now the dealer says that it might be an exhaust leak that is causing the out of limits readings between the upper and power O2 sensors. I really don't want to drop $$$ into an entire new exhaust system that may or may not fix the problem, so I was wondering if there was something else that could be done.

I remember hearing about people with 350Z's doing something to bypass the O2 sensors when they put on aftermarket exhausts. I guess it had something to do with the aftermarket CAT's or something. Could someone explain what it is that will bypass the O2's? I was gonna see if maybe that would work on my truck to solve the exhaust problem that I've been having since they are similar motors. Let me know if you guys have any insight, thanks!
MEDEL514 is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 03-13-2010, 07:13 AM
Shift_Obsessed
 
mustard23's Avatar
 
Join Date: Aug 2006
Location: Bagram AFB
Posts: 9,335
Thanks: 33
Thanked 263 Times in 205 Posts
Feedback Score: 1 reviews
Did you look at your wiring harness? Mine came unclipped and rubbed against my front drive shaft and causing a short in the wiring and that was one of the first codes I threw..
mustard23 is offline  
#3 (permalink) Old 03-13-2010, 07:25 AM
Shift_Enthusiast
 
MEDEL514's Avatar
 
Join Date: Mar 2006
Location: Kaiserslautern, Germany
Posts: 361
Thanks: 0
Thanked 20 Times in 9 Posts
Feedback Score: 0 reviews
you threw a P2A03 from a chaffed wire? hmmm, I didn't notice anything while I was under there, but I'll have to take a closer look now. Thanks for the heads up!
MEDEL514 is offline  
#4 (permalink) Old 03-13-2010, 07:29 AM
Shift_Obsessed
 
mustard23's Avatar
 
Join Date: Aug 2006
Location: Bagram AFB
Posts: 9,335
Thanks: 33
Thanked 263 Times in 205 Posts
Feedback Score: 1 reviews
It was always random O2 codes.. I would clear it and then a mouth or so later it would throw it again i can't remember what code it was.
mustard23 is offline  
#5 (permalink) Old 03-13-2010, 08:48 AM
Shift_Hardcore
 
TwoBills's Avatar
 
Join Date: May 2005
Location: Manassas, VA
Posts: 1,045
Thanks: 0
Thanked 41 Times in 41 Posts
Feedback Score: 0 reviews
You might have a sensor that is bad out of the box. Use a volt meter and check the sensors. Generally, you should get a reading around 1/2 vdc at idle that fluxuates between 1/2 and 1vdc when you run the rpms up to 2500. 0 volts or no flux. = bad sensor. Generally.

Run it 'till it breaks and fix it faster!
TwoBills is offline  
#6 (permalink) Old 03-13-2010, 11:41 AM
Shift_Enthusiast
 
MEDEL514's Avatar
 
Join Date: Mar 2006
Location: Kaiserslautern, Germany
Posts: 361
Thanks: 0
Thanked 20 Times in 9 Posts
Feedback Score: 0 reviews
As many times that these sensors have been changed wether under warranty of out of pocket, its unlikely that they have all been bad out of the box.

What about the O2 simulators? I'm wondering if I should just go ahead and get some simulators just to bypass whatever problem it is that I'm having...

Last edited by MEDEL514; 03-13-2010 at 11:57 AM.
MEDEL514 is offline  
#7 (permalink) Old 03-13-2010, 05:29 PM
Shift_Enthusiast
 
Join Date: Aug 2008
Location: corona
Posts: 193
Thanks: 0
Thanked 18 Times in 16 Posts
Feedback Score: 2 reviews
go here O2 Simulator, E-commerce

Yu need the dual channel with heater resistor. It will trick the ecu by providing resistance on the rear o2's. The ecu will see the voltage variance and think the cats are functioning properly.

Nick
prerunnerparts is offline  
#8 (permalink) Old 03-13-2010, 06:55 PM
Shift_Obsessed
 
MOBEEBO's Avatar
 
Join Date: Jul 2006
Posts: 2,144
Thanks: 168
Thanked 105 Times in 82 Posts
Feedback Score: 0 reviews
There is a technical service bulletin (NTB08-103b) for the 2007 model year where they change the sensors to a different one that has a different shape to it and reprogram the ECM. PM me your email and I will send it to you in PDF form. You can take it to the dealership and see if they can work with you on this. Good luck.
MOBEEBO is offline  
#9 (permalink) Old 03-14-2010, 11:13 AM
Shift_Hardcore
 
TwoBills's Avatar
 
Join Date: May 2005
Location: Manassas, VA
Posts: 1,045
Thanks: 0
Thanked 41 Times in 41 Posts
Feedback Score: 0 reviews
[QUOTE=MEDEL514;846783]As many times that these sensors have been changed wether under warranty of out of pocket, its unlikely that they have all been bad out of the box./QUOTE]

You only mentioned that you changed each one, once. You also said that you replaced them. Nothing about checking them. I'd still put a meter on them. Only takes one bad one to set a code.

Run it 'till it breaks and fix it faster!
TwoBills is offline  
#10 (permalink) Old 03-14-2010, 01:24 PM
Shift_Hardcore
 
devious1's Avatar
 
Join Date: May 2008
Location: somewhere
Posts: 1,261
Thanks: 29
Thanked 59 Times in 53 Posts
Feedback Score: 1 reviews
Like someone else said...Exhaust leak, check for a leak.
devious1 is offline  
Reply

  Nissan Frontier Forum > Mods and Technical Discussions > Performance Mods

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Nissan Frontier Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Pingbacks are On
Refbacks are On