Murpheys Mobile Auto Repair LLC

02/20/2026

There’s a common misconception about “diagnostics.”

A lot of people think it’s just plugging in a scan tool, reading a code, and replacing a part. In reality, a code only points you in a direction—it doesn’t always tell you what’s actually broken. While some issues don't set a check engine light at all.

Real diagnostics means testing and inspecting the system with the right equipment: smoke machines, pressure testers, live data, etc. In this case, a tiny hole in an EVAP hose was the real cause of the EVAP faults and check engine light.

In the automotive world, we sum it up simply: "test, don’t guess."
That extra time up front is what prevents unnecessary parts, repeat repairs, and wasted money.

02/16/2026

Has your car been losing coolant but you're not sure where it's leaking?

This thermostat housing was leaking due to a cracked plastic body, found by pressure testing the cooling system. Years of heat cycles, pressure, and exposure to the environment slowly make plastic brittle until it finally gives way.

Pressure testing exposes those weak points before a small leak turns into an overheating problem. If you’re losing coolant, smelling antifreeze, or topping off the reservoir more than you should, it’s time to have the system checked.

📞Give us a call to Schedule your service today!

02/10/2026

These photos show the real cause of an “O2 sensor code” that wasn’t actually a bad O2 sensor.

The sensor had previously been replaced in attempt to clear the check engine light. The code came back because the real problem was a broken wire at the O2 sensor connector, not the sensor itself.

Proper diagnostics led to the actual fix: repairing the damaged wire with solder and weather-proof heat shrink so it won’t fail again in the same spot. That repair cleared the code and fixed the issue correctly.

Codes point to failure within a system; not always what caused the failure. Testing, inspecting, and verifying is what separates real repairs from repeat comebacks.

02/02/2026

Before and after of a much-needed battery and battery cable replacement on a Dodge Cummins diesel.

This truck was plagued with weird electrical issues, intermittent stalling, and random no-start problems. That’s classic high-resistance behavior—bad cables and weak batteries choking off voltage where the truck needs it most.

Diesels are picky about voltage. If the batteries are tired or the cables are corroded, everything from starting to sensors to control modules can start acting possessed.

Fresh batteries, clean connections, and solid cables brought this one back to normal.
Sometimes the fix isn’t complicated—it’s just about giving the system the power it was designed to have.

01/26/2026

Here's a good example of a wheel bearing failure..

No lubrication means metal-on-metal, extreme heat, and eventually parts starting to weld themselves together from friction.

When a bearing gets to this stage, it’s not just a “noise problem.”
It’s a safety problem—because complete failure can let the wheel come off and cause a serious accident.

If you hear humming, grinding, or feel vibration from a wheel, get it checked early. Proper lubrication and timely repairs are what keep wheels where they belong.

01/20/2026

🥶My reaction to this upcoming weather

06/17/2025

Got noisy brakes?

We handle a wide range of brake service on-site, at your convenience.

No waiting rooms, no tow trucks — just fast, affordable repairs wherever you are.

📍 Serving DeKalb County and surrounding areas
📞 Call or message to get scheduled today

10/28/2024

Loving this weather we’ve had lately for these repair jobs! 🙌🏼

10/26/2024

Murpheys Mobile Auto Repair LLC is now on Google. Check us out!

Mechanic

09/26/2024

🐀 Got rats? ..

Unfortunately, my customer’s motorhome did. A good bit of damage was done. The truck wouldn’t idle and would stall out.

✅ Thankfully I was able to fix it for the customer and it’s now road ready again

Give us a call today if your vehicle isn’t running like it should!

256-630-0899

(Completed repair video posted in comments )

09/13/2024

In Dekalb Co. or Surrounding Area
and need your vehicle repaired?

Give us a call!
256-630-0899

09/05/2024

🚗 Having car troubles? Let us come to you! 🛠️

Murpheys Mobile Auto Repair LLC offers convenient, on-site vehicle diagnostics and repairs in DeKalb County, Alabama. No more waiting at the shop or paying for towing—get quality service right where you are! Affordable, reliable, and efficient.

📞 Call us today and get your car back on the road without the hassle!