Check Engine light staying on in Chevy Aveo. Yes

Engine light lit ? Have it checked for DTC'S - diagnostic trouble code's ! Do you know what DTC'S are for ?

Scan it to get codes & erase them if you have already fixed the problem. If it comes back, scan it again

Tighten your fuel cap 3 times to make sure its tightned. don't push it in when you tighten it. Use Fuel injection cleaner like once a month... You may have gotten bad gas. Don't use 100 percet gas. Use gas with ethenol... you get better gas mileage. I go through 3-4 tanks a week. I use the 87 octane and I put Berrymans Fuel injection cleaner in once a week. I don't know about your hesitations though I drive a 5 speed

P2135 Throttle Position Sensor (TPS) Property Malfunction, remember this is not a car that is built by GM it is a Korean import.

There is a recall on those gas caps. Go to dealer.

Hey, Lisa!
I had a problem with my 2004 Chevy Cavalier doing this - Try taking it to Autozone for a free diagnostics. I did this and replced the gas cap. The seal was bad and when I replaced the cap, the check engine light went out after a little bit.

most any sensor going bad can cause the check engine light to come on,try disconnecting the posative battery cable for 15 seconds ,then put it back on,will reset the codes, or take it to auto zone,they will test your computer for codes at no charge to you.i had a venture van my was ox. sensor. thanks robert b.

It needs a code scanner hooked up to it,to tell you why the light is on and the cause. If there is an autozone near you take it there or
call different auto part stores to find out if they do that.Without getting the code, it's just guessing what the problem is.

Yes, the gas cap will cause the Check Engine Light to come on. Will set code P0441 if I remember correctly. It should be okay to drive it. If you would like to confirm the code, take the truck to an auto parts store like Autozone and have them hook up their scan tool and read the code. If its P0441 it will probably be something like EVAP or Evaporative system leak.

Its an easy enough fix while your there too, just pick up a new gas cap or you could pick up an OEM one from the dealership.

I doubt the gas cap is related to the light, though hopefully you can get a replacement for it because it can be dangerous. As for the check engine light I'm not sure what it could be. Is the car running making noises, does it stall?? If there are no obvious symptoms, you might need to take it to a mechanic so they can read the error message from the cars computer and determine where th eproblem is.