LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Car throwing random dtc codes

Old Jul 4, 2020 | 05:18 PM
  #1  
ss27gogeta's Avatar
Thread Starter
On The Tree
iTrader: (4)
 
Joined: Apr 2014
Posts: 149
Likes: 2
From: Indiana
Default Car throwing random dtc codes

Car is a 95 ta im useing scan 94-95 to scan for dtc's and have noticed when I watch the dtc screen a random code will appear for like half a second. then disappear then a minute or so later it will do it again but a different code. is this a sign my pcm is on its way out or is this normal. the only codes I have left that stay are the egr air pump and ac codes becouse they have been deleted.
Reply
Old Jul 5, 2020 | 01:06 AM
  #2  
Tyler Dietzenbach's Avatar
TECH Fanatic
5 Year Member
Liked
Loved
Community Favorite
iTrader: (5)
 
Joined: May 2019
Posts: 1,006
Likes: 133
From: Kentucky
Default

Originally Posted by ss27gogeta
Car is a 95 ta im useing scan 94-95 to scan for dtc's and have noticed when I watch the dtc screen a random code will appear for like half a second. then disappear then a minute or so later it will do it again but a different code. is this a sign my pcm is on its way out or is this normal. the only codes I have left that stay are the egr air pump and ac codes becouse they have been deleted.
I would try a different scanner first.. then check all of your grounds and connections, including the PCM. Make sure both PCM harnesses are screwed in tight.
Reply
Old Jul 5, 2020 | 09:39 AM
  #3  
Slowroll's Avatar
Staging Lane
 
Joined: Sep 2018
Posts: 54
Likes: 3
From: In the mitten
Default

If PCM has not been tuned, I would have it reflashed turning off deleted equipment. PCM defaults for the different codes can problematic, it's best just make them go away.
Reply
Old Jul 6, 2020 | 01:28 PM
  #4  
94_LT1_TransAm's Avatar
12 Second Club
10 Year Member
Shutterbug
Loved
 
Joined: Dec 2015
Posts: 294
Likes: 7
Default

Originally Posted by Tyler Dietzenbach
I would try a different scanner first.. then check all of your grounds and connections, including the PCM. Make sure both PCM harnesses are screwed in tight.
1995 LT1 PCMs dont have screw type connectors unlike the later LS1 PCMs. His should just be the click type that have the "clips" that attach to the socket housing. Like a typical pigtail/sensor connection just to clear up any future confusion for LT guys.

Reply


Thread Tools
Search this Thread

All times are GMT -5. The time now is 02:24 PM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-04 05:00:17


VIEW MORE
story-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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