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Check engine light flash on then off

Tiny
LONGLEANLADY1
  • MEMBER
  • 2012 CHEVROLET IMPALA
  • 3.6L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
My check engine light started flashing. I pulled over and turned off the car. I got out and tightened my gas cap. I just refilled. I turned it back on and it was off. The car seems to be running fine. What do you think it could be?
Thursday, April 23rd, 2020 AT 12:46 PM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

If the light was flashing, it is an indication of an engine misfire. It has nothing to do with your gas cap at all.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

There is a code stored for the light and I need that code. A parts store will read the code for free.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

How long since you had the plugs changed?

Once I get the code, I can narrow the area of failure for you.

Roy
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Thursday, April 23rd, 2020 AT 1:12 PM
Tiny
LONGLEANLADY1
  • MEMBER
  • 7 POSTS
The code is p057c.
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Saturday, April 25th, 2020 AT 7:44 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay I attached the code description for you below. This code has nothing to do with the flashing check engine light.

You will need someone with a real scan tool to look at the history codes as I still think you have the misfire issue I listed in my previous post.

Roy
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Saturday, April 25th, 2020 AT 8:04 AM

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