Auto Diagnosis & Training Software

Scan Tool Companion Car Diagnostic Training Software

A Quick Reference & Training Guide on How To Use a Scan Tool to Diagnose and Repair Computer Engine Control Systems and Sensors.

scan tool companion software main menu

If you have a scan tool or scanner software (any brand), you need Scantool Companion to maximize your repair knowledge and skills!





Scan Tool Companion is a quick reference guide for ALL scan tool users.

This program provides guidance and help on how to troubleshoot Check Engine Light problems, Trouble Codes, and driveability, emissions,
and performance problems on 1996 and newer OBD2 vehicles with your scan tool.


This software does NOT interface with your vehicle.

It is an app for a Windows laptop or desktop PC that will help you use your existing scan tool codes and data to fix common engine performance and emissions problems.

Scantool Companion does NOT contain vehicle specific year/make/model repair information.
What is does provide is GENERAL diagnostic and repair guidance to help you quickly pinpoint and fix common fuel, ignition, sensor and emissions problems on ANY vehicle.


What Does Scantool Companion Do?

The app helps you understand what might be causing a particular Trouble Code so you can look at specific data on your scan tool or perform certain tests using a volt-ohm meter to accurately diagnose the problem.

Scantool Companion includes diagnostic help and tips you won't find in factory service information or a manual. It can provide much needed insight into possible causes of various codes, driveability or emission problems, with additional information on what parts should be replaced to fix the fault.

For example, say your Check Engine light is on and you have a P0171 or P0174 lean code or maybe a misfire P0300 code. Now what do you do? A lean code or a misfire code by itself only tells you a problem has been detected. It does NOT tell you what is causing the problem or what parts might need to be replaced.

That's where Scantool Companion comes in handy. The app provides a list of possible causes, tells you which PIDS (system data) you should be looking at on your scantool to identify and diagnose the fault, and provides suggestions on what parts might need to be replaced. This kind of assistance can be a real time saver, and reduce the risk of replacing a bunch of expensive parts that really were not needed.


Scantool COmpanion Features Include:


Diagnose problems by CODE, by SYMPTOM or by SYSTEM.

Scan Tool Companion tells you the most likely causes of codes or symptoms, tells you what to check, and
what PIDS (data parameters) you need to look at with your scan tool.
It also offers expert tips on what parts might need to be replaced and why.
It's like having an expert technician at your fingertips to help with your diagnosis.

Saves you time, money and the frustration of replacing parts unnecessarily! Fix it right the first time with smarter diagnostics!

Help Sections in the app enable you to better understand the basics of your vehicle's onboard diagnostic
system (OBD II), including what it does, how it monitors various sensors and systems, and why it sets fault codes.

Tips on how to pass an OBD II "plug-in" emission test (what's required, what they look at, what to do if your vehicle is rejected or fails).

Quick reference sections on basic sensor operation, fuel injection, ignition, charging system and emissions.

A quick reference list of common GENERIC OBD II "P0" fault codes with definitions that apply to ALL vehicles.

Please note this program does NOT include "P1" manufacturer specific enhanced codes that are unique to a particular year/make/model of vehicle.

Sample Screens from the Scan Tool Companion program:

fuel diagnostics screen

rough idle diagnostics screen

engine control system screen

engine misfire diagnostics screen

oxygen sensor and catalyst diagnostics screen


NOTE: This program does NOT interface with your vehicle or make your PC function as a scan tool. This is a quick reference guide for troubleshooting faults using codes and data from your scan tool.
Scantool Companion will tell you which PIDS you should be looking at to diagnose a fault, what might be causing the problem and how to fix it.


System Requirements:

Program runs on ANY Windows PC or laptop (11, 10, 7 or XP).

Note: This software will NOT run on an Apple/MaC computer, iphone or Android smart phone or tablet.

Sorry, No Refunds on Software.


How to Order Scantool Companion:


Click BUY NOW Button Below if you wish to buy Scantool Companion now for $29.95 and receive it as a DOWNLOAD.

When payment is received, you will be emailed a DOWNLOAD LINK for the program.

You can then download the setup file to your computer, then click the setup file to install the software.
NOTE: Orders are usually sent same day except holidays and weekends.

Click this BUY NOW button to purchase download



If you have any download questions or issues, see our Tech Support page for help.



More CarleySoftware Products:

Alignment & Suspension Diagnosis Guide

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Brake Guide

Car Care Guide

Emission Guide

Front-Wheel Drive (FWD) Guide

Onboard Diagnostics (OBD2) Guide

R134a Retrofit Guide

Sensor Guide

Turbo Guide


Get All The Programs in one EVERYTHING package

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