PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

02 sensor not ready

Thread Tools
 
Search this Thread
 
Old May 25, 2019 | 11:14 AM
  #1  
rodwood's Avatar
Thread Starter
Teching In
 
Joined: Mar 2019
Posts: 29
Likes: 3
Default 02 sensor not ready

Hello all


I installed an California emissions legal LS 3 crate into my C 10. I cant get the 02 Sensor to get into ready status, I purchased a scan tool to check my readiness and after several drive cycles the 02 Sensor will not ready leaving me with 1 flag. The computer has no codes and the MIL is not illuminated, but verified to be working during the self check at startup. Has anyone had this issue I have put about 400 miles on the truck completed the drive cycle at least 4 times cleared the computer with the tool effectively resetting the sensors to not ready and repeating the drive cycle and even cleared by battery disconnect. efter each drive cycle the pesky 02 sensor is the only one that wont set. if anyone can share some thought it would be appreciated.

Reply
Old May 25, 2019 | 11:16 AM
  #2  
G Atsma's Avatar
TECH Senior Member
5 Year Member
Liked
Loved
Community Favorite
 
Joined: Jun 2016
Posts: 22,291
Likes: 3,616
From: Central Cal.
Default

There are FOUR O2 sensors. One might be defective. It happens.
Reply
Old May 25, 2019 | 11:31 AM
  #3  
rodwood's Avatar
Thread Starter
Teching In
 
Joined: Mar 2019
Posts: 29
Likes: 3
Default

thank you ,
I did install 4 at the time of assemble, I'm sure it could be one of the 4 or there may be other contributing factors that create the problem, I'm hoping to find as many as I can and chase them down before replacing sensors.
Reply
Old May 25, 2019 | 04:36 PM
  #4  
Floorman279's Avatar
TECH Junkie
15 Year Member
Photogenic
Photoriffic
Liked
iTrader: (11)
 
Joined: Mar 2011
Posts: 3,699
Likes: 168
From: Wilmington, DE
Default

try swapping the sensor and see if the issue follows
Reply
Old May 27, 2019 | 09:54 AM
  #5  
rodwood's Avatar
Thread Starter
Teching In
 
Joined: Mar 2019
Posts: 29
Likes: 3
Default

Because I have no Codes and the 02 sensors appear to be functioning Bank 1 sensor 1 voltage .100-.745 at 600RPM .085-.735 @ 1500 RPM bank 2 sensor 1 .090-.765 @600 RPM and .095-.760 @ 1500 RPM because no codes or a way to identify a the problems location swapping may not tell me what the problem is I have already completed the drive cycles and logged about 400 miles does any one know could this be a drive more and it will go away or am I getting or loosing unmonitored or monitored air at the sensors?
Reply




All times are GMT -5. The time now is 12:08 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE