423Code.

Mobile Car Diagnostics, Keys, and Coding. I Come to You.

423Code is a mobile auto electronics service in Chattanooga, TN. No shop, no tow, no waiting room.

Se habla español.

Check Engine Light and Diagnostics

  • Full-System Scan + Digital Report, $59. Every module read, PDF report on the spot. Free if the scan finds nothing.
  • Basic OBD-II scan, $39.
  • Code explanation and next steps, $40.
  • Pinpoint electrical work, from $75 per hour after a scan.

Keys and Fobs

  • Key programming, from $59. Price confirmed for your vehicle before booking.
  • All-keys-lost smart key programming, from $129.
  • MyKey clearing, $59.
  • Makes covered: Hyundai, Kia, Nissan, Honda, Acura, Chrysler, Jeep, Dodge, Ram, Ford.

Don't see your make? Text me.

Batteries and No-Start

  • Jump start with battery and charging test, $39.
  • Battery deep dive, $30.
  • Bundle: jump start, deep dive, and full-system scan, $89.
  • Battery registration for European cars, $59.

Pre-Purchase Inspections

  • Electronic inspection before you buy, $99.
  • Hybrid and EV inspection, $199.

Before you buy, know what the computer knows.

Coding and Modules

  • Ford auto start-stop disable, $59.
  • Start-stop disable plus full-system scan, $89.
  • Vehicle feature coding for Ford, RAM, Jeep, and Nissan, $59.
  • Tire size recalibration, $45.
  • Air suspension calibration, $59.
  • Module configuration and proxy alignment, from $129.
  • Module reset and relearn, from $59.
  • TPMS relearn, from $35.
  • Electronic parking brake service mode, $49.

Diesel Trucks

  • DPF forced regeneration, $99.

Diesel truck in limp mode? Text me.

How It Works

  1. Text me your vehicle and the problem.
  2. I come to you, home or work.
  3. You get a PDF report and a straight answer.

I do electronics, not mechanical repairs. The report tells your shop exactly what to fix, or I fix it if it's electronic.

Professionally insured through THREE by Berkshire Hathaway.

Service Area and Travel

Service area: Chattanooga, Hixson, Red Bank, East Ridge, Ooltewah, Soddy-Daisy, Brainerd.

Travel: free within 10 miles, $2 per round-trip mile beyond 10, over 30 miles is outside our service area.