O2 sensor millivolt range ? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Electrical
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 08-20-2006, 07:00 PM
coldknock's Avatar
Last photo:
Join Date: Feb 2004
Location: Social Circle, Ga.
Age: 45
Posts: 1,533
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
O2 sensor millivolt range ?

'00 Mazda Millenia, 2.5L V6

I need to know if anybody knows or has the proper operating range in millivolts for the front oxygen sensor.

Thanks in advance.


Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 08-20-2006, 07:39 PM
67 Deuce 4 Me's Avatar
Bowtie or Die!
Last photo:
Join Date: Dec 2004
Location: TN
Age: 46
Posts: 637
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
O2 sensor does exactly that....senses oxygen in the exhaust. Normally a fully heated o2 sensor running the engine 2000 rpm should constantly be switching from lean (under 500mv)all the way down to near 0mv, to rich over (500mv) all the way up to 999mv. That would be what you would see on a engine that is running properly. You need to run the engine at 2000 rpm to check this to keep it heated.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-21-2006, 02:18 PM
78novaman's Avatar
The AMC, FORD, & CHEVY Guy??!!
Last wiki edit: Improving fuel economy
Last journal entry: Finally on the road
Last photo:
Join Date: Nov 2002
Location: Central Ohio
Age: 34
Posts: 299
Wiki Edits: 0

Thanks: 0
Thanked 3 Times in 2 Posts
What Deuce 4 Me said, normal operating range for upstream (or front) O2 sensors is 0-999mV. I don't know the spec on your car, but I believe you should have a fairly steady 400-500mV at idle and the engine has been running for at least 30 minutes, giving the sensors enough time to heat up.

A reputable shop should be able to hook it up to a scan computer that will flag any bad sensor reading. This is usually $50-$100 vs $150+ at a dealer.
Reply With Quote Quick reply to this message

Recent Electrical posts with photos

Quick Reply

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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

Posting Rules
You may post new threads
You may 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
More low/mid range torque for a 454 tb pickup? macx Engine 1 06-26-2005 01:53 PM
O2 fuel injection and simplicity NXS Engine 15 05-24-2005 12:33 PM
Intake rpm range 350 vs 400 brainsboy Engine 2 09-04-2004 11:13 AM
O2 sensor crshrmn3 Engine 2 09-01-2003 01:12 AM
Nairb's Movie Review--open Range NAIRB Hotrodders' Lounge 4 08-24-2003 02:08 AM

All times are GMT -6. The time now is 06:55 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.