Vehicle Diagnostics

Know what's wrong before the mechanic does.

PlugDiag turns your phone into a vehicle diagnostic tool. Plug into your car or truck, get plain-English answers. No $100 shop visit required.

Look Up a Code Try P0301 →
Trouble Code
P0301
Cylinder 1 misfire detected
Translation
Your spark plug in cylinder 1 is likely worn or fouled. Replace it. ~$8 part, 20 min job.
System Status
● Transmission OK
● Engine: 1 issue
● Brakes OK
● Emissions OK
How it works

Three steps. No mechanic degree needed.

01

Plug In

Connect the adapter to your vehicle's port. Works with cars and trucks, old and new.

02

Scan

Open PlugDiag on your phone. It reads every trouble code and sensor in your vehicle's computer.

03

Understand

Get plain-English explanations. Not cryptic codes. What's wrong, what to do about it, and what it should cost.

The difference

Built for real people, not technicians.

PlugDiag

  • Plain English explanations, not code dumps
  • Cars and trucks, gas and diesel
  • Tells you cost to fix and difficulty level
  • No monthly subscription

Everyone Else

  • Show you "P0301" and leave you guessing
  • Focus on passenger cars only
  • Read codes but don't explain repairs
  • $5-10/month subscriptions that add up
The market
$2.8B
OBD2 Bluetooth scanner market by 2033
8.1%
Annual growth rate, accelerating with EV adoption
#1
DIY consumers are the fastest-growing segment

Your car is already telling you what's wrong. PlugDiag translates.

Every vehicle built after 1996 has a computer that tracks every system. PlugDiag gives you access to that data in language you actually understand.

Look Up Your Code Now