Its Friday, I've got my aloha shirt on, driving to work in "Friday light" traffic, listening to the Frankenstein book on tape I have. Life is good.

Then comes the monster. The service engine soon light comes on at about 60 mph and goes off. The traffic stops dead in its tracks. The car develops a stumbling idle. I manage to get off the freeway and the light comes back on and stays on for a while on the side streets. Idles like crap. Light then goes off.

I guess I am going spend my weekend reading codes and replacing parts.

First question, does the computer remember the code even if the light is off?

Second question, what's it sound like folks? My guess is O2 sensor.

OOPS, '95 LT-1 110,000 miles, 6-speed

 

What's the year and mileage of your car? What's been done to your car by way of mods and/or repairs? It doesn't sound like an O2 sensor. If it was, the light would most likely constantly remain on. Problems do remain in the memory even after the light goes out. It's hard to diagnose the problem without knowing what your car is (year, model, etc.).

 

my guess is that you have a yellow 95. i wonder how i figured that out any how o2 sensor a s good a place as any to start.

 

Check for loose or dirty connections on the knock sensors. What you describe sounds like you went into limp home mode.

 

Wow, drvn2fast is a psychic!!!!! He knew what year the car was AND, he even knew what colour it was!!!! Wow, it's like he....like...he.....saw a yellow vette in the Avitar, and looked at the dude's username. hahahaha *LOL* Oh wait, now I'm having a premonition.... 85 500 horse has a 1985 Corvette, and it has.....ummmm...ahhh.... 500 horsepower?!?!?!

Sorry 85 500, had to do it.....

 

Wow, drvn2fast is a psychic!!!!! He knew what year the car was AND, he even knew what colour it was!!!! Wow, it's like he....like...he.....saw a yellow vette in the Avitar, and looked at the dude's username. hahahaha *LOL* Oh wait, now I'm having a premonition.... 85 500 horse has a 1985 Corvette, and it has.....ummmm...ahhh.... 500 horsepower?!?!?!

Sorry 85 500horse, had to do it.....

 

everyone is just guessing...go to autozone and pull the codes, that is the only way you will KNOW what caused it to come one and yes the computer will save the code in its memory...i have an O2 sensor that I need to change cause it stopes working randomly and then comes back on, it sets off a code and then the light goes off after a few times of driving the car...i pull the codes with my CarChip and the computer flashes all the codes that have been recorded everytime the car starts up

 

huh

 

First, let me get this off my chest:
Hey Smack123, what's with all the redundant and useless comic posts, you tryin to score free posting points or what!??? Get back in your Igloo!

Now down to your SeS:
I had similar problems with my '95 (66K miles), and yes, you can have codes thrown w/o SeS coming on, as they will get stored in memory until cleared. If you want to get your codes without going to Autozone or wherever, you can get the codes by shorting pin 4 and pin 12 with a bent paper clip, or small wire on your ALDL. With engine off, short these 2 pins together, then turn ignition to "on", but do not start engine. The codes will pop up where your fuel gauge is. The first code you will see is C12, which is not an error, this is only the start indicator, and error codes will follow. Codes will cycle through one by one, and when it is finished a C12 will appear again, and the error codes will cycle through again, so just write down the error codes you see between the first set of C12's, and turn ignition off, remove shorting wire from your ALDL. O2 sensor(s) could be your problem, they would show up as H-44 or H-45 for left O2 sensor; H-64 or H-65 for your right O2 sensor.

My problem turned out to be a bad TPS sensor, code thrown by PCM was H-22.

Your ALDL connector type would be the 16-pin type shown here:
http://www.obd1.com/

And you can get codes for your '95 & engine type here:
http://www.troublecodes.net/GM/

good hunting! If you have problems understanding the codes, just post them on the Forum, and the experts will chime in....