Got a check engine light on?

A level 1 (basic) auto diagnostic includes:
Got multiple lights on?

A level 2 (advanced) auto diagnostic includes: Everything in Basic PLUS
Got electrical issues?

A comprehensive diagnostic includes: Everything in Advanced PLUS
Need a specific test?

Pick one specialized diagnostic below or from the section below.
Need your engine tuned?

A system tune-up includes fine tuning for one of the following systems:
About to buy a car?

A pre-purchase diagnostic includes: Everything in Basic PLUS
Tire Pressure Monitoring System (TPMS) — Monitors tire pressure and alerts the driver when pressure is low or a sensor has a problem.
Infotainment / Radio System — Controls audio, navigation, Bluetooth, displays, and other multimedia functions.