PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

yet ANOTHER O2 problem!!

Old Mar 12, 2006 | 04:25 PM
  #1  
KALEL's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Jul 2003
Posts: 608
Likes: 0
From: fortress of solitude
Default yet ANOTHER O2 problem!!

I'm doing some tuning for a friend of mine and his passenger 02 has messed up once again. We just did a head swap on the car, and now I get no reading on the o2. It sits at a constant 0mV. We checked the power wire and its getting power. Have checked the harness for any pinching,etc. and found nothing. We threw a simulator on that side and it does the same thing, 0mV. This leads me to believe that the o2 is still ok(its only about a month old). If ANYONE has any solution, I would be extremely grateful. Thanx.
Reply
Old Mar 12, 2006 | 04:41 PM
  #2  
KALEL's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Jul 2003
Posts: 608
Likes: 0
From: fortress of solitude
Default

And also all the fuel trims are sitting at -100
Reply
Old Mar 14, 2006 | 11:38 AM
  #3  
KALEL's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Jul 2003
Posts: 608
Likes: 0
From: fortress of solitude
Default

ttt...
Reply
Old Mar 14, 2006 | 12:45 PM
  #4  
oange ss's Avatar
TECH Junkie
20 Year Member
iTrader: (50)
 
Joined: Jan 2005
Posts: 3,241
Likes: 6
From: Texas
Default

check the connector on the harness side ?
Reply
Old Mar 15, 2006 | 12:22 AM
  #5  
KALEL's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Jul 2003
Posts: 608
Likes: 0
From: fortress of solitude
Default

Yea checked the wires all the way back to the PCM. Nothing. I am absolutely baffled by this thing!!
Reply
Old Mar 15, 2006 | 01:03 AM
  #6  
TimZ28's Avatar
TECH Regular
 
Joined: Jan 2002
Posts: 414
Likes: 0
From: Orlando, FL
Default

Originally Posted by KALEL
I'm doing some tuning for a friend of mine and his passenger 02 has messed up once again. We just did a head swap on the car, and now I get no reading on the o2. It sits at a constant 0mV. We checked the power wire and its getting power. Have checked the harness for any pinching,etc. and found nothing. We threw a simulator on that side and it does the same thing, 0mV. This leads me to believe that the o2 is still ok(its only about a month old). If ANYONE has any solution, I would be extremely grateful. Thanx.
With the car completely cold start the car and immediately log the O2 voltages. If you still see 0 mV you have a short or there the input receiver is damaged in the PCM. You should see ~450 mV until the PCM believes the O2 sensors are heated.

Tim
Reply


Thread Tools
Search this Thread

All times are GMT -5. The time now is 03:11 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
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-4
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-5
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-6
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-7
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-8
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-9
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