Check engine light

[Asells]

My check engine started flashing today while I was driving. Was driving up a gradual hill with the cruise set at 58 mph. Caught it out of the corner of my eye, flashed for about 1 minute then went away. All gauges were normal, no loss in power, everything seemed normal. Idles fine, checked all plug wires (seem fine). Checked for codes and nothing. Should I be worried? Truck is a 2015 sierra 1500 with about 14,400 miles.

[O_J_Simpson]

Did you check the engine?

[Asells]

Did you check the engine?

In what way? I checked for any obvious signs of anything.

[Asells]

Maybe bad gas? I did fill up yesterday

[20L8TSierra24]

Loose gas cap?

[morrislee]

Use a code reader, see of anything was triggered and saved. you can get them cheap at local shop or get a bluetooth one that you can do so much more.

[Asells]

Use a code reader, see of anything was triggered and saved. you can get them cheap at local shop or get a bluetooth one that you can do so much more.

I checked for codes with my tuner. Hopefully it was just a fluke. I'll see how it goes today.

[TJay74]

Flashing service engine light is the code for misfire being detected by the ECM.

[thewhitestallion]

Usually when it begins to flash it is a severe misfire. If it was flashing then you should have been able to feel the engine vibrate a little bit seeing how it was running at least one cylinder short.

[Asells]

Didnt feel any vibration at all. Everything felt normal. I guess I'll see how things go.

[TJay74]

Misfire events typically are stored in the ECM as a P0300 or so depending on the bank the misfire was detected on.

[Asells]

Would my diablo intune pick up a good? Thats what I tried yesterday and it said nothing found. Drove normal this afternoon.

[redwngr]

And some codes are automatically cleared if they do not repeat within a certain number of engine cycles.

[Asells]

So far it hasn't done it after a day and a half.

[joshc64311]

So far it hasn't done it after a day and a half.

Mine did this yesterday, care to give an update? Was it AMF related?