Engine & Diagnostics

The check engine light is one of the most misunderstood warnings on your dashboard. It can be triggered by something as minor as a loose gas cap or as serious as a failing catalytic converter. A parts-store scanner reads the trouble code, but it can't tell you which of a dozen possible causes is behind it. That's the difference between a code and a diagnosis.

At The Garage we pull the codes, then verify the real fault with live data, targeted testing, and a road test. You get a clear explanation and a written estimate before we touch anything — no mystery charges, no replacing good parts on a hunch.

Jackson sits above 6,200 feet, and the passes climb far higher. Thinner air changes how your engine breathes and how its sensors report, so a fuel-trim or misfire reading here doesn't always mean what it would at sea level. Add winter mornings well below zero — hard on batteries, sensors, and cold-start fueling — and mountain-town vehicles throw symptoms that reward a technician who actually knows the local conditions. We factor all of that into every diagnosis.

• Check engine and warning lights — misfires, oxygen and mass-airflow sensors, emissions faults, and more.
• Performance issues — rough idle, hesitation, stalling, poor fuel economy, and loss of power on grades.
• Electrical gremlins — no-starts, dead batteries, alternator and charging faults, and intermittent glitches.
• Noises, vibrations, and leaks — tracking a symptom back to its real source before it becomes a breakdown.
• Overheating and cooling faults — critical to catch before a climb over the pass turns into a head-gasket repair.