No codes good or bad?
Thread Starter
Drifting
Joined: May 2004
Posts: 1,747
Likes: 1
From: Port McNicoll Ontario
No codes good or bad?
I have been using my code reader for a while now and it has always given me codes through the SES light.
By battery went dead on my car a couple of weeks ago because I left the door open in the garage and forgot about it for a couple of days.
The battery is recharged now but I don't get any codes.
Not even the 12 code.
I thought when there were no codes to show I would still see a '12'?
So my question is. Should I worry about it, is something screwed up or is this totally fine?
Thanks for any answers.
Jeff
By battery went dead on my car a couple of weeks ago because I left the door open in the garage and forgot about it for a couple of days.
The battery is recharged now but I don't get any codes.
Not even the 12 code.
I thought when there were no codes to show I would still see a '12'?
So my question is. Should I worry about it, is something screwed up or is this totally fine?
Thanks for any answers.
Jeff
Race Director
Joined: Dec 2000
Posts: 17,551
Likes: 26
From: El Paso Texas
Originally Posted by mikey whipreck
disconnecting the battery will clear all stored codes...
But you should ALWAYS get a code 12 when you check...
Usually that's an indication something is wrong with the ECM...
But you should ALWAYS get a code 12 when you check...
Usually that's an indication something is wrong with the ECM...
Definitely try this before replacing anything.
Race Director
Joined: Dec 2000
Posts: 17,551
Likes: 26
From: El Paso Texas
Originally Posted by 65Z01
Jumper ALDL pins A&B (upper right) and turn the key On.
flash [pause] flash flash
3 times.
If your car is running fine, I'm betting your ECM is good and your code reader has a problem.
Good luck.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Drifting
Joined: May 2004
Posts: 1,747
Likes: 1
From: Port McNicoll Ontario
Okay so it looks like the computer.
I tried the paper clip, fan comes on but no SES flashing.
Exact same as when I plug in the store bought paper clip/ code reader.
Good thing I bought a spare ECM on ebay a couple of months ago just because the price was right.
I tried the paper clip, fan comes on but no SES flashing.
Exact same as when I plug in the store bought paper clip/ code reader.
Good thing I bought a spare ECM on ebay a couple of months ago just because the price was right.
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Originally Posted by 87 rag
Okay so it looks like the computer.
I tried the paper clip, fan comes on but no SES flashing.
Exact same as when I plug in the store bought paper clip/ code reader.
Good thing I bought a spare ECM on ebay a couple of months ago just because the price was right.
I tried the paper clip, fan comes on but no SES flashing.
Exact same as when I plug in the store bought paper clip/ code reader.
Good thing I bought a spare ECM on ebay a couple of months ago just because the price was right.
Thread Starter
Drifting
Joined: May 2004
Posts: 1,747
Likes: 1
From: Port McNicoll Ontario
I brought this post back out again because I had a related question.
I read that some cars need to be driven to reset the computer. Is it possible that I am getting nothing for codes because the car has not been moved or even put in gear sinse the battery was charged?
Thanks
I read that some cars need to be driven to reset the computer. Is it possible that I am getting nothing for codes because the car has not been moved or even put in gear sinse the battery was charged?
Thanks
Melting Slicks
Joined: Jun 2004
Posts: 3,032
Likes: 4
here's a question no one asked...
do you EVER see the SES light come on?
it should for a second when you start the car...
Might be something as easy as the light burnt on in the DIC
I have disconnected the battery for a week at a time already, and still get code 12 when i check... (without driving the car around)
do you EVER see the SES light come on?
it should for a second when you start the car...
Might be something as easy as the light burnt on in the DIC
I have disconnected the battery for a week at a time already, and still get code 12 when i check... (without driving the car around)
Thread Starter
Drifting
Joined: May 2004
Posts: 1,747
Likes: 1
From: Port McNicoll Ontario
Thank you Mike Whipreck.
I started the car and nothing.
The light I mean.
I will change the bulb and hopefully find that I am back to normal.
I knew it was worth bringing up agian.
I started the car and nothing.
The light I mean.
I will change the bulb and hopefully find that I am back to normal.
I knew it was worth bringing up agian.
Thread Starter
Drifting
Joined: May 2004
Posts: 1,747
Likes: 1
From: Port McNicoll Ontario
I don't know what fixed it but everything seems to be working fine now.
I had to fix a couple of vacuum lines under the plennum and replace the EGR temp switch. I did this and put everything back together. Still nothing but I ran the car until the oil temp guage started to register.
Turned it off and the SES light came on. Put in the paper clip and read code 12 3x, then a pause and code 12 again.
Ahhh, it's a good feeling.
Thanks for your help all.
I had to fix a couple of vacuum lines under the plennum and replace the EGR temp switch. I did this and put everything back together. Still nothing but I ran the car until the oil temp guage started to register.
Turned it off and the SES light came on. Put in the paper clip and read code 12 3x, then a pause and code 12 again.
Ahhh, it's a good feeling.
Thanks for your help all.