Mechanic running diesel diagnostics on a laptop next to a semi truck
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Fault codes read at your truck

Mobile Diesel Diagnostics

Check engine light, derate, or a code you can't make sense of? We plug in at your truck, find the actual problem, and fix it on site whenever we can.

Stop Guessing at Fault Codes

Warning lights and derates always seem to show up at the worst time. Instead of throwing parts at it or paying a tow just to get the truck scanned, A&E Mobile Semi Repair brings the diagnostic tools to you along I-44 in Sarcoxie, Stotts City, Pierce City, and Mount Vernon.

Once we know what is going on, we tell you straight what it takes to fix it and whether we can handle it right there on the spot.

Diesel Problems We Track Down

  • ✓Check engine and stop engine lights
  • ✓Derates and loss of power
  • ✓Aftertreatment and DEF warnings
  • ✓Sensor and wiring faults
  • ✓Charging and starting problems
  • ✓Overheating and cooling issues
  • ✓Air system faults
  • ✓Intermittent electrical problems

What to Tell Us Before We Roll Out

Write down any codes or messages on the dash, when the problem started, and whether the truck is still drivable. That info helps us show up with the right tools and parts instead of making two trips.

If it turns out to be a simple fix, we can usually knock it out on the same call as part of our roadside semi repair.

Diagnostic questions

Mobile Diagnostics FAQ

Can you just clear the code for me?+

We can read and clear codes, but clearing a code without fixing the cause usually just brings it back down the road. We find the root problem first so it stays fixed.

Is a mobile diagnosis cheaper than a tow to a shop?+

In a lot of cases, yes. You skip the tow bill and the wait for a shop bay, and if the fix is simple we can often handle it on the same visit.

Do you work on my engine?+

Tell us the truck make, model, and engine when you call and we will let you know right away if it is something we can diagnose on site.

Stranded Right Now?

Call A&E Mobile Semi Repair. We will get you back on I-44.