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Old 08-25-2011, 12:33 PM   #1
3361333616
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Default check engine light after pumping gas

I filled up at two separate stations and the pump would shut off after 3 seconds at each station. Now my check engine light is on... any idea what's going on? I'm still getting normal fuel mileage.
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Old 08-25-2011, 12:34 PM   #2
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Was the car running while filling up? That would do it.
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Old 08-25-2011, 12:37 PM   #3
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Quote:
Originally Posted by 3361333616 View Post
I filled up at two separate stations and the pump would shut off after 3 seconds at each station. Now my check engine light is on... any idea what's going on? I'm still getting normal fuel mileage.
I'm not being a smart-azz with this next comment......

Your gas cap could be loose.... the new vehicles monitor the tank pressure and if iit senses a loss of pressure the check engine light goes on.

Make sure you turn it until it clicks a couple of times.

Could also be a faulty gas cap..... or sensor.... or..... but I would start with the gas cap.

Good luck
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Old 08-25-2011, 12:41 PM   #4
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Originally Posted by ALD_Z06 View Post
Was the car running while filling up? That would do it.
Nope. Car was off
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Old 08-25-2011, 12:45 PM   #5
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Quote:
Originally Posted by IDSRVIT View Post
I'm not being a smart-azz with this next comment......

Your gas cap could be loose.... the new vehicles monitor the tank pressure and if iit senses a loss of pressure the check engine light goes on.

Make sure you turn it until it clicks a couple of times.

Could also be a faulty gas cap..... or sensor.... or..... but I would start with the gas cap.

Good luck
That was the first thing I checked, gas cap is on tight. I'm on a 1500 mile cross country trip... I hope this problem goes away. I don't want to have to find a Chevy dealer.
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Old 08-25-2011, 12:52 PM   #6
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When you put the cap on do not put any inward pressure on it. Just turn it until it clicks a few times but don't push on it at the same time.
And to solve the pump shutting off every few seconds turn the nozzle/handle to a 90 angle in either direction while your pumping so it's horizontal instead of vertical. I had the same problem and that fixed it.
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Old 08-25-2011, 01:02 PM   #7
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Check the seal on the gas cap to make sure it didn't stick and roll up on its edge. Needs to be laying flat for a proper seal so the vapor recovery system doesn't trip the check engine light.

Regarding the pumps, they to have a vapor recovery check system in place that will shut off the pump if it doesn't have a proper seal. I noted on the C6 that the fill is on a more extreme angle than your typical car/truck.
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Old 08-25-2011, 01:05 PM   #8
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I had the same problem, I started pulling on it a little bit while screwing it back on and haven't had a problem sense.
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Old 08-25-2011, 01:25 PM   #9
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Quote:
Originally Posted by EVRose View Post
When you put the cap on do not put any inward pressure on it. Just turn it until it clicks a few times but don't push on it at the same time.
And to solve the pump shutting off every few seconds turn the nozzle/handle to a 90 angle in either direction while your pumping so it's horizontal instead of vertical. I had the same problem and that fixed it.
The horizontal pumping fixed the shut off issue but the check engine light is still on. Owners manual says a "few" trips with the cap properly installed and the light should go off. We'll see how many trips that ends up being.
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Old 08-25-2011, 02:01 PM   #10
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Originally Posted by 3361333616 View Post
The horizontal pumping fixed the shut off issue but the check engine light is still on. Owners manual says a "few" trips with the cap properly installed and the light should go off. We'll see how many trips that ends up being.
From my past experiences on my 06Z06 with the gas cap issue, it will take a dozen engine starts to turn off the CEL. I would highly recommend that you completely remove and then reinstall the gas cap as described above; ie, don't exert downward pressure on the cap as you twist it on. My gas cap CEL almost always happened right after a fill-up. It's a common enough problem with the C6 gen cars.
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Old 08-26-2011, 10:33 AM   #11
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I also noticed if you try to top off after the pump knocks off fuel will enter the evap. control system and will trigger the ck eng. light.
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Old 08-26-2011, 10:56 AM   #12
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I have not had this issue with the Corvette but with my GTO it happens a lot and the only way to clear the light is to pull the ECM fuse for a few seconds and it will reset. I have replaced the gas cap and it throws a code a few times a year and usually when the tank is low.
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Old 08-26-2011, 11:47 AM   #13
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I don't think you can call yourself a car guy if you don't have a code scanner. They're $30 from amazon.
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Old 08-26-2011, 03:13 PM   #14
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I don't think you can call yourself a car guy if you don't have a code scanner. They're $30 from amazon.
Was $30...now even cheaper. $26 to your door and works on the C6

http://www.amazon.com/Autel-MaxiScan...4381972&sr=8-1

Bought one the same day I got back from Autozone where the girl, who is apparently required to scan for me since I used to borrow it and scan in their lot, said she cleared the code and didn't.
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Old 08-26-2011, 04:23 PM   #15
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I use a Predator to scan the codes and it has an option to clear the codes but it does not. I pull the fuse to clear the evap code for the gas cap.
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Old 08-26-2011, 05:06 PM   #16
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It could also just be a faulty fuel cap. It's been discussed on hear often. I know you don't want to find a Chevy dealership, but this would be very inexpensive and easy. Just go to parts dept. It's a diy.
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Old 08-26-2011, 06:49 PM   #17
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Quote:
Originally Posted by speedlink View Post
It could also just be a faulty fuel cap. It's been discussed on hear often. I know you don't want to find a Chevy dealership, but this would be very inexpensive and easy. Just go to parts dept. It's a diy.
I pulled into a Chevy dealer in Dallas today and the light turned off once I got in the parking lot... it was almost as if the car knew.
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Old 08-26-2011, 06:50 PM   #18
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Quote:
Originally Posted by C6ToGo View Post
Was $30...now even cheaper. $26 to your door and works on the C6

http://www.amazon.com/Autel-MaxiScan...4381972&sr=8-1

Bought one the same day I got back from Autozone where the girl, who is apparently required to scan for me since I used to borrow it and scan in their lot, said she cleared the code and didn't.
Thanks for the link, I'm going to order one when I get to my destination.
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Old 08-26-2011, 06:53 PM   #19
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Quote:
Originally Posted by 3361333616 View Post
I pulled into a Chevy dealer in Dallas today and the light turned off once I got in the parking lot... it was almost as if the car knew.
They don't make 'em like they used to.....
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Old 08-30-2011, 09:14 PM   #20
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Quote:
Originally Posted by 3361333616 View Post
I pulled into a Chevy dealer in Dallas today and the light turned off once I got in the parking lot... it was almost as if the car knew.
Glad to hear it cleared. Probably just needed to cycle a few more times to clear the code.
Let us know if it redevelops and what the outcome is.
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Old 08-30-2011, 09:14 PM
 
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