Gas? Check Engine Light?

[808streetrunner]

I was driving home last night going uphill and noticed that my check engine light just went on? I looked at my gas and i had none? ok im an idiot for driving without gas? so i put gas and my check engine light is stil on? so i go home and i unhook the battery and hook it back up! check engine light off, drove it around and no check engine light! Now why would my check engine light come on like that?

[American Psycho]

could be anything, gas cap not tightend.


oh yeah thanks for giving more info about type of vehicle

[r34drifter]

gas pump sucked debris due to little gas remaining... dunno

[302stangGT]

i wouldnt worry about unless the check engine light comes on a 2nd time...btw you live in one of the best places on earth....kailua

i was there this past summer and it was incredible, the water was cystal blue

[American Psycho]

lucky bastard ^

[Mr.Honda24]

You realize disconnecting ground is just resetting the ecu.

The check engine light will come back on if a sensor senses a problem

[ratfink454]

That's why you do it, to see if it was just a fluke or a persistent problem.

[HoSlappa]

Originally Posted by ratfink454

That's why you do it, to see if it was just a fluke or a persistent problem.

No, you take your azz to autozone and they read the code for free and you find out what the problem is. It could be any sensor that gets read by the ECU or an emmisions problem but first you have to read the stinkin' code. Get cracking.

[dsmtim]

^^ thats pretty good advise.

[808streetrunner]

sorry the car is a 2000 honda civic ex basically all stock, i threw my friends decoder on it and it threw a code P0420 something about the catalyist system running below threshold or something like that, so i ran over to my uncle's shop and he said that its just the 10% ethonal gas we are running down here it sucks ass so he tells me to erase it everytime it comes on so i do and i erase it so after erasing it and driving for like 10 mins no full throlte normal driving it comes on again so i say what the **** run an octane booster and 92 gas to try and compensate but yet the fu*king light returns what the hell is going on?

[v_dub_ya]

Originally Posted by 808streetrunner

sorry the car is a 2000 honda civic ex basically all stock, i threw my friends decoder on it and it threw a code P0420 something about the catalyist system running below threshold or something like that, so i ran over to my uncle's shop and he said that its just the 10% ethonal gas we are running down here it sucks ass so he tells me to erase it everytime it comes on so i do and i erase it so after erasing it and driving for like 10 mins no full throlte normal driving it comes on again so i say what the **** run an octane booster and 92 gas to try and compensate but yet the fu*king light returns what the hell is going on?

i get that code on some of the cavaliers at my work and we have to replace the catalytic converter, we didnt fix one for about 2 months and it started to run like shit

just what ive experienced with that DTC(diagnostic trouble code) P0420

[bildo16]

none fo this makes sense. the only thing about the cat is if it ran very lean, it could melt the inside, but very unlikely since your car woulf die before it got to this point. id say you prolly have a sensor issue, or matbe a bad ground?? thats just me though. check a honda dealer, maybe a common issue.

[djfury]

could have gotten some debrie sucked into your feul injectors

[low_civic]

Originally Posted by sikkferio

^^ thats pretty good advise.

and yet you had no advise lol...


i would say take it to you local mechanic and have it checked out..

[AAandHT]

That 10% ethanol shit is bad if the gas stations dont pump out the water from their tanks. Up here in jersey a few stations already had cars not beable to pull off the island, might have been some bad gas you got.