The fault that two other shops already gave up on.
Check engine lights. Intermittent no-starts. Parasitic draws that kill a battery overnight. Communication faults. The fault that won't happen while the car is at the shop. The thing two other places replaced parts for and didn't fix.
This is the work Jesse likes best. People drive here from Joliet, Romeoville, Homer Glen, Plainfield, and Bolingbrook for exactly this.
Why this is different from reading a code
A code reader tells you which circuit reported a problem. It does not tell you what's wrong. A P0700 doesn't mean “buy a transmission,” and a module that isn't responding doesn't mean the module is dead — as one 2016 Jeep Patriot on our Hard Ones page found out, after a shop replaced its transmission control module for nothing.
Finding the actual fault takes a scope, live data, wiring diagrams, and someone who knows what the waveform is supposed to look like. That's an hour of skilled work, and that's what you're paying for.
What it costs
$150 for the first hour. You get diagnostic time from an ASE Certified Master Technician and a written explanation of what's wrong with your car — yours to keep, whether we do the repair or not. We don't credit it back against the repair, because the diagnosis is the thing we did.
Intermittent faults are quoted as a two-hour block. A problem that only shows up cold, or hot, or over a particular bump, cannot honestly be found in sixty minutes. We'd rather tell you that before you drop the car off.
Bring us what you've got
If another shop has already worked on it, tell us everything — what they said, what they replaced, what changed and what didn't. None of that is embarrassing and all of it is useful. Knowing what a problem isn't is half of finding out what it is.