OBD2 Car Scanner App for Every Driver Understand Your Car Better with an OBD2 Diagnostic App
Diagnose problems, reset the Check Engine Light, and monitor your car's performance with ease. OBD Auto Doctor gives you clear, real-time insights into your car's health.
OBD Auto Doctor is a powerful yet easy-to-use OBD2 diagnostic app that helps you understand your car's health. Connect your ELM327 dongle, read and clear trouble codes, and monitor your vehicle's performance in real time. Available for iPhone, Android, macOS, and Windows, it's the car scanner made for every driver.
How can an OBD2 diagnostic app help you?
Imagine the peace of mind of having a smart OBD2 car scanner in your pocket, ready to identify problems before they become costly repairs. Don't let warning lights or car troubles weigh you down — OBD Auto Doctor helps you understand your vehicle's health so you can drive with confidence and peace of mind.
Identify issues with your car
Find out why the Check Engine Light, aka Malfunction Indicator Light (MIL), is on by reading the diagnostic trouble codes (DTCs).
Ensure inspection readiness
Ensure your car is ready for the emissions test. Check the status yourself before the inspection to avoid re-inspection.
Monitor data in real-time
View sensor data in real-time in numeric and graphical form. Monitor car performance and functionality.
Initiate service routines
With a few bi-directional controls, request the car to initiate routines such as Diesel Particulate Filter regeneration.
Drive more economically
Learn to drive more economically by monitoring the fuel economy in real-time. Save nature and cash at the same time!
Save money
Reset an obsolete Check Engine Light warning yourself and save money on unnecessary dealer visits!
Over 5 million downloads
What others say about it?
Works great! Money well spent! — Saved me hundreds of dollars for sure. Super happy with this tool I recommend this highly!!!!
Randy Kimmel
5 out of 5 stars
Brilliant OBD software — Excellent app which makes it very easy to monitor or identify problems and clear them.
Dick Weiler
5 out of 5 stars
Awesome — I'm in the auto industry and if i had to buy a machine that does all this it would cost a fortune.
Sean Stephens
4 out of 5 stars
Amazing App! The best OBD app I ever used — Just tried using this app last 2 weeks, then I subscribed to the 1-year plan. Now I can clear the check engine light with ease, plus more additional features.
Whatsapperism
5 out of 5 stars
ASE mechanic here...this is a very good price. You'll save the money in repairs. Knowledge is power.
Lloyd
5 out of 5 stars
Love it! — This updated version is perfect. It works with cheap obd reader, has live sensor data, reading/clearing fault codes, simple interface.
nordicnurse
5 out of 5 stars
Is OBD Auto Doctor the right OBD2 car scanner for you?
Discover how our powerful OBD2 diagnostic app helps everyone — from everyday drivers to DIY mechanics — understand their vehicle's health. Learn who it's perfect for and how you can benefit from using OBD Auto Doctor.
For car enthusiasts and everyday drivers
Curious about your car's performance and fuel consumption? Want to keep an eye on your engine's coolant temperature or fuel pressure? With OBD Auto Doctor, you can monitor all of this — and more — right from your pocket. You can even check if your car is ready for an emissions test before heading to inspection.
Tired of visiting the repair shop every time the Check Engine Light (MIL) turns on? A simple diagnostic reading can cost $50 or more. Over time, that adds up — not to mention the hassle. With OBD Auto Doctor, you can read Diagnostic Trouble Codes (DTCs) and reset the Check Engine Light yourself, saving both time and money.
For modern DIY mechanics
Every modern car has an onboard computer, but communicating with it used to be a mystery. With OBD Auto Doctor, you can finally access your car's Engine Control Unit (ECU) and read diagnostic information just like a pro — without expensive dealer visits.
Spot small problems before they become big ones. For example, replacing a faulty oxygen sensor early can prevent costly catalytic converter damage later. Or save up to $200 by changing an easy-to-replace mass airflow sensor yourself. When you're done, simply reset the Check Engine Light and get back on the road.
For dealers and small repair shops
If you sell used cars or run a small repair shop, OBD Auto Doctor is the perfect diagnostic solution. Read and monitor real-time engine parameters, trouble codes, and Freeze Frame data directly from the ECU. After repairs, reset DTCs and the Check Engine Light in seconds.
OBD Auto Doctor supports Stored (Mode 3), Pending (Mode 7), and Permanent (Mode A) Diagnostic Trouble Codes, as well as Oxygen Sensor and On-Board Monitoring Tests, including Readiness Monitors — giving you complete visibility into the engine's health.
Ready to try out yourself? Download and get started now!
How to Get Started with OBD2 Software?
Learn the basics of On-Board Diagnostics (OBD2) and what you need to start diagnosing your car today.
What is On-Board Diagnostics (OBD2)?
On-Board Diagnostics, or OBD, is a computer-based system built into all modern cars. It continuously monitors the engine, emission controls, and other key systems to detect malfunctions.
The OBD-II standard provides detailed access to your car's health information — including sensor data, engine parameters, and Diagnostic Trouble Codes (DTCs) — through the vehicle's Electronic Control Units (ECUs).
When troubleshooting, this data helps you quickly identify and understand what’s going on under the hood.
Required: OBDII compliant car
How does OBD diagnostic software work?
OBD2 diagnostic software, like OBD Auto Doctor, communicates directly with your car's onboard computer. With the help of a small OBD2 dongle, the app connects to your vehicle and retrieves diagnostic information in real time.
The software requests and reads data such as engine performance, fuel system status, and emission readiness — then presents it in a clear, easy-to-understand format.
That's where the real value comes in: turning complex data into useful insights for drivers, DIY mechanics, and professionals alike.
You need: OBD Auto Doctor on your mobile or computer
What is an ELM327 dongle?
The ELM327 dongle or adapter acts as a bridge between your car and the diagnostic software. It plugs into the vehicle's 16-pin OBD2 port, usually located beneath the dashboard near the steering wheel.
These dongles come in several types — Bluetooth, Wi-Fi, USB, or serial — depending on your device and setup.
For help choosing the best option, check out our OBD Adapters & Dongles guide.
Required : ELM 327 based OBD2 dongle
