Troubleshooting possible O2 Sensor problems - Chevrolet Forum - Chevy Enthusiasts Forums

Go Back   > >
Log In 

General Tech Good at troubleshooting? Have a non-specific issue? Discuss general tech topics here. IF YOUR QUESTION IS SPECIFIC TO A CERTAIN MODEL, IT DOES NOT GO IN THIS SECTION.

LinkBack Thread Tools Search this Thread
Old 09-25-2011, 10:23 PM
CF Beginner
Thread Starter
Join Date: Aug 2011
Posts: 3
Default Troubleshooting possible O2 Sensor problems

I have been trouble shooting an 0420 code on my rig. Not wanting to replace the cat if it is fine, I wanted to do some troubleshooting.

I removed the two o2 sensors on the vehicle passenger side.

I moved the two sensors from the driver side to the passenger side.

I put 2 new sensors on the driver side.

I found that the driver side rear o2 sensor was not tightened down like the other three were. This may have been the cause of the original code.

However, here are some of the readings I am getting on my front sensors now:

Rich to lean sensor switch time Bank 1/S1 = Value .064 sec / Max .14 sec
Lean to Rich sensor switch time Bank 1/S1 = Value .032 sec / Max .204 sec

Rich to lean sensor switch time Bank 2/S1 = Value .024 sec / Max .144 sec
Lean to Rich sensor switch time Bank 2/S1 = Value .016 sec / Max .204 sec

The voltage sensor values for each bank are fairly close.

Not sure what the TID $70 and $71 read, but they are 119/119 on Bank 1 and 132/146 on Bank 2.

I have no experience dealing with these numbers. I would say that the new sensors I put in are operating slower than the old sensors. I would think that is a bad thing. Is it enough of a difference to pull the new/slow sensors out and return them for a different brand? I would think that the old sensors with 110,000 miles should be the ones with the slower responses.

Does anyone that knows what these numbers mean, have any suggestions? Or am I correctly intepreting the numbers?

Thanks for any help.
Reply With Quote
Old 09-26-2011, 12:08 PM
CF Beginner
Join Date: Sep 2011
Location: Bush Alaska
Posts: 7

Have you replaced your fuel filter? May be restricting fuel flow???? i don't know, just a thought.

2003 Avalanche 1500
128,955 miles
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Oil pressure sensor troubleshooting Terry Odell Silverado & Fullsize Pick-ups 2 01-02-2012 05:09 PM
App Sensor/App Sensor 2 problems gossimer Monte Carlo & Lumina 3 11-12-2010 04:47 PM
Troubleshooting front and rear noises Marathonsueno Equinox 2 07-30-2009 11:40 PM
Help troubleshooting a fuel? problem losfomot Cavalier 1 11-16-2007 05:38 PM
Express CD Troubleshooting jtaafe General Tech 1 10-17-2006 01:16 PM

02, 70, chevy, lean, maximum, o2, oxygen, problem, problems, rich, sensor, sesnor, switch, tid, tid70, time, troubleshooting

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 02:16 PM.