406 Mobile Mechanic
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406 Mobile Mechanic work truck parked on a Great Falls street, ready for the next service call

Check Engine Light Diagnostics in Great Falls, MT

A code is a starting point, not an answer. Josh scans, tests and traces the fault on site so you only pay to fix what's actually wrong.

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

  1. Job ticket#406-01

    01

    Call or Text

    Tell us what's going on and where you are — 7 days, 8 AM–9 PM.

  2. Job ticket#406-02

    02

    Fast Quote

    We source parts and send a labor quote right away.

  3. Job ticket#406-03

    03

    We Come to You

    Diagnose on site and show you the exact issue firsthand.

  4. 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

“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.”

Cindy Fuson

Google Review

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Need Diagnostics? Call or text 406-799-0095

Open 7 days, 8 AM–9 PM

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.

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