Car Diagnostic Workflow – Step-by-Step Fault Finding

Stop guessing. Start diagnosing.
GarageBro Diagnostic Workflow guides you through a car fault step by step – from the first visual checks to a confirmed repair – so you test first and replace parts last.

How it works

  1. Choose – select the tools you have (basic tools, multimeter, OBD scanner) and the problem.
  2. Test – follow checks that change based on your answers, with typical values to compare against.
  3. Record – write down codes, measurements and what you found.
  4. Fix – confirm the fault before replacing anything, then retest.

What you get

  • 12 problem areas: warning lights, no start, battery, misfire, brakes, overheating, loss of power, noise, electrical, transmission, A/C and turbo
  • Only the checks that match your tools
  • A repair report you can print or save as PDF
  • Works on phone tablet or computer-buy once, log in and use it anytime

Your notes are saved only in your own browser on this device. We do not collect or store them.

This workflow helps you organise your diagnosis. It does not replace a qualified mechanic or the vehicle manufacturer's data. Always follow safety rules, especially with brakes, airbags and fuel systems. If you are unsure, have the vehicle checked by a professional.

Stop guessing.
Start diagnosing.

A step-by-step diagnostic workflow for DIY car owners and mechanics. Pick your tools and the problem, follow checks that change with your answers, record your measurements, and confirm the fault before you buy parts.

01Choose
02Test
03Record
04Fix
$19.90One-time payment · No subscription
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What you get

  • 12 problem areas: warning lights, no start, battery and charging, misfire, brakes, overheating, loss of power, noise and vibration, electrical, transmission and clutch, A/C and heating, turbo
  • Checks that match your tools: basic tools, multimeter, OBD scanner
  • Typical values to compare your measurements with
  • Memory log and a repair report you can print or save as PDF
  • Works on phone, tablet and computer

The workflow helps you organise your diagnosis. It does not replace a qualified mechanic or manufacturer data. Always follow safety rules, especially with brakes, airbags and fuel systems.