Understanding the appropriate procedure and diagnosis codes for a particular study question is an important part of analyzing Medicare data. These codes are very specific and can change from year to year as new codes are added and others are discontinued.
There is no wear-out factor in the coil itself other than thermal cycling and the damage it may cause. Boots and wires do age, resulting in reduced insulation value over time. The key to correct ignition system diagnosis is to understand the details of how the system you are working on really functions. PAGE:
What causes ignition coils to go bad? I have been driving around with the low pressure fuel sensor fault for the past 1000-2000 miles. My car randomly started misfiring the other day when I would try to go WOT. I swapped ignition coils and the misfire followed the coil so it seems like the coil has gone bad.