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:
When a car functions properly, it drives smoothly and fairly silently. Stalling, low engine power, backfiring, engine noise, and difficulties getting the car started are clear signs that something is amiss. Because ignition coils supply power to the car's spark plugs, a faulty coil can cause any of these symptoms. If the broken coil is not replaced, it can cause long-term damage to the car's engine and exhaust system.