Mobile Check Engine Light Diagnostic & Repair — Medford, OR

Starting at $149, in your driveway!

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Stop Guessing. Find Out What It Actually Is.

The check engine light is one of the most stressful things in a car. It could be a loose gas cap. It could be a failing catalytic converter. It could be a misfiring cylinder that's about to get worse. And you can't tell from looking at the light, it looks the same no matter what triggered it.

Here's what we do: we come to you, plug into your OBD-II port, pull every stored and pending code, look at the freeze-frame data (what was happening when the code set), and give you a plain-language explanation of what's going on. Not just the code number, what it means, what likely caused it, what happens if you ignore it, and exactly what it'll take to fix.

The diagnostic is $99. If we do the repair, that fee gets credited toward the repair cost. You're not paying to be told what the problem is and then paying again to fix it.

What's Included

Full OBD-II scan, all stored, pending, and permanent codes
Freeze frame data review, engine conditions when code triggered
Plain-language explanation of every code, no jargon
Visual inspection of related systems when accessible
Honest repair recommendation with upfront pricing
$99 fee credited toward repair when booked with us
Mobile service, performed at your home or office

Common Check Engine Codes We See in Medford

P0420 / P0430 — Catalytic converter efficiency below threshold (O2 sensor or failing cat)
P0300–P0306 — Random or cylinder-specific misfire (plugs, coils, injectors)
P0171 / P0174 — Lean fuel mixture (MAF sensor, vacuum leak, fuel pressure)
P0401 — EGR flow insufficient (carbon buildup or failed EGR valve
P0455 / P0442 — Evap system leak (gas cap, purge valve, charcoal canister)
P0128 — Engine running below normal temperature (thermostat issue)
P0102 / P0113 — Mass air flow or intake air temperature sensor

We Diagnose and Repair, Not Just Read Codes

A lot of places will scan your codes and hand you a printout. We actually diagnose. There's a difference between knowing which code set and knowing why, and why is what determines the correct repair. A P0420 code, for example, might be a failing catalytic converter, a bad oxygen sensor, an exhaust leak, or even incorrect fuel trim. We track it down before we recommend a fix.

Frequently Asked Questions

Q: Can't I get codes read for free at AutoZone? A: You can get the code numbers for free. What you won't get is a diagnosis — the code tells you which system flagged, not why. A P0420 can have four different root causes. We interpret the codes and identify the actual problem.

Q: Will the check engine light go away on its own? A: Sometimes, if it was triggered by something temporary like a loose gas cap, it may clear itself after a few drive cycles. More often, it stays on until the underlying issue is repaired. Ignoring it risks additional damage.

Q: Do you clear the code after the repair? A: Yes. We clear the code after confirming the repair is complete and verified. Clearing it before repairing the problem is just turning off the warning — the code will return.

Q: What if the repair is something you can't do on-site? A: We'll be straight with you. Some repairs like a catalytic converter, replacement we can do mobile. Others may require a shop lift. We'll tell you exactly what's needed and point you in the right direction if it's outside our scope.

Ready to Book? We Come to You.

Call or text (541) 299-2854, email Medford@curbside-auto.com, or book directly at curbsideauto.com. We serve Medford, Central Point, White City, Jacksonville, Phoenix, Talent, and Ashland — all within 15 miles. No waiting room. No drop-off. We come to you.