How Long for a Coil Failure to trigger a SES

[jsoto]

Multitude of issues just sorta cropped at the same time leading to different diags on different fronts pre/post repair

In no special order. battery had a short. Bench tested clean but for sure, after replacing battery, the V issues I was seeing disappeared.
New reman trans. Initial diag seemed to be V issues but upon further test drive, it was def. the tran.
Fast forward to post reman trans. Got a heavy shudder and initial thought was bad TQC on it. More driving, pointed to misfires. Nothing on the cluster, but after some test driving, saw the SES blip about a couple times. Couple post test drives and nary a blip on the cluster though.

Car was driving like a wet dog. Got it read with real scan tools, confirmed bad coil. Anyhow, new coils and plugs in, and power is back where it should be.

How many misfires is required before the SES lights comes on. Ha, I was saying if she still drives like a wet dog, going to need to add a smoke evap tool to the stash of tools