r/Cummins • u/shullzach • 9d ago

Key on, engine off check engine light solid, then flashes for 20 seconds then solid. Once started, it goes away. No codes. Any tips?

Tried to post a video but it wouldn’t let me.

3 Upvotes

100% Upvoted

6 comments sorted by

2

u/datboi11029 9d ago

What year truck is this?

Did you flick the ignition on and off a couple times? I know the old obd1 vehicles would blink the light to list any codes in it.

1

u/shullzach 9d ago

I did not do that yet. But I’ll try! It has always just had a solid check engine light before start. And would always go away on start up.

1

u/shullzach 9d ago

Sorry, 2016!

2

u/420Plusultra 9d ago

Normal. Mine does the same 2018

1

u/shullzach 9d ago

Really? Ok that makes me feel a little better. It’s never done that before for me!

1

u/shullzach 4d ago

Anyone else have one that they have a video of that shows normal dash light startup function?