“Excellent mechanic! Knows his stuff! Knew right what to do and what he needed to get the repair done quick! Was so very prompt, helpful and polite. 10 out of 10 would recommend Josh for your repair needs.”

The work
What's Included
- Scan tool reading of stored and pending trouble codes
- Live data review of sensors, fuel trims and engine performance
- Hands-on testing to confirm the failed part before anything is replaced
- A clear explanation of the cause and your repair options
- A labor quote for the fix
Symptoms
Signs You Need Diagnostics
- Check engine light is on or flashing
- Rough idle, misfires or hesitation
- Worse fuel mileage than usual
- Failed emissions or a strange exhaust smell
- The vehicle runs different but there's no obvious cause
Mobile advantage
Why Get It Done On Site
Josh shows you the problem firsthand, shows up when he says he will, and gives you an honest quote before the work starts.
Military discount available — Malmstrom AFB families welcome.
Test it where it fails
Some problems only show up in your conditions — cold mornings, your commute.
No parts cannon
The failed part is confirmed before money is spent on replacements.
Fix it on the same visit
When the parts are on hand, the repair can often happen right after the diagnosis.
Honest, reasonable quotes
Parts sourced and a labor quote sent right away — no surprises.
Dispatch board
How Diagnostics & Check Engine Light Works
- Job ticket#406-01
01
Call or Text
Tell us what's going on and where you are — 7 days, 8 AM–9 PM.
- Job ticket#406-02
02
Fast Quote
We source parts and send a labor quote right away.
- Job ticket#406-03
03
We Come to You
Diagnose on site and show you the exact issue firsthand.
- Job ticket#406-04
04
Job Done Right
Repaired the first time, on time.
Communication is key — you'll always know what's happening.
Questions
Diagnostics & Check Engine Light FAQs
Can I keep driving with the check engine light on?
A steady light usually means get it checked soon. A flashing light often means an active misfire that can damage the catalytic converter — have it looked at before driving much further.
Isn't a code reader enough?
A code tells you which system flagged a problem, not which part failed. Proper testing finds the actual cause so you don't replace parts that weren't broken.
Will you show me what you found?
Yes. Josh shows you the problem firsthand and explains the options before any repair.
Google review
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Diagnostics & Check Engine Light at your home, job site or roadside in Great Falls, Black Eagle, Malmstrom AFB, Vaughn, Belt, Cascade, Ulm, Sun River, Dutton, Fort Benton and across Montana. See the service area, browse all services, or contact Josh.
Request service
Not an Emergency? Request Service
For non-urgent repairs, inspections, or fleet service, send a quick request and Josh will get back to you. Broken down right now? Call or text 406-799-0095.
All contact options →