MechaOBDMeet your vehicle.
Plug a compatible adapter into the OBD-II port and connect from MechaOBD.
Ready to connectCAR DIAGNOSTICS. HUMAN INSIGHTS.
Every car has
a story.
Understand yours.
Get insights shaped by your vehicle’s make, model, engine, and captured data. With a compatible adapter, start checking your car right at home—no appointment needed.
Available for iPhone and iPad · iOS / iPadOS 18+
Compatible Bluetooth OBD-II adapter required.
+ YOUR VEHICLE. ITS DATA. YOUR NEXT STEP.
A CLEARER NEXT STEPLikely cause.
Evidence included.
Evidence included.
01 Start right at home02 Specific to your vehicle03 Explained in plain English
MORE THAN A CODE READER
A warning light.
A clearer picture.
A warning light is only the beginning.
Your car reports trouble codes. They tell you where to look, but the rest of the story is in the data.
DEMO CAPTUREMECHAOBD / 01
Illustrative signal traceWHAT THE CAR REPORTEDP0171 + P0441 + P0455
Three related codes in one demo capture.
VEHICLE DATAHUMAN INSIGHTS
HUMAN INSIGHTS. EVIDENCE INCLUDED.
Get to know
your next step.
What might be wrong? Why does the data point there? Explore a real example of how MechaOBD connects the dots.
Open the full sampleMECHAOBD DIAGNOSTIC REPORT
SAMPLE REPORT2015 Toyota RAV4
2.5L 4-cylinder · Guided Health Check
THE BIG PICTURE
Three codes. One possible connection.
The engine is running lean, and the vehicle is also reporting a fuel-vapor system leak. Taken together, the captured data points toward the purge circuit as a likely place to investigate.
WHAT THAT MEANS FOR YOU
A stuck-open purge valve or damaged hose could explain the pattern. Testing the circuit can help distinguish between them before replacing parts.
P0171 Lean conditionP0441 Purge flowP0455 Large EVAP leak
A place to start. Not a parts shopping list.
01Leading possibility
EVAP purge valve
A valve that stays open can let unmeasured air into the intake while preventing the vapor system from sealing.
02Alternative
Purge hose
A disconnected or cracked hose could produce a similar pattern. Inspection and testing help tell the difference.
These are hypotheses from one demo capture, not confirmed component failures.
The readings help connect the dots.
+25.3%Average combined fuel trim
3Related trouble codes
During the demo’s warm-idle window, the engine computer was adding substantial fuel. That supports the lean-condition code. The simultaneous vapor-system codes make the purge circuit worth investigating.
CONTEXT MATTERS
The higher-RPM data was brief and sparse. This capture cannot settle every possible cause.
Bring a better question to your mechanic.
Download the sample PDFAdapted from the app’s demo report. Not a diagnosis of your vehicle.
YOU DON’T HAVE TO SPEAK CAR
Plug in. Follow along.
Understand more.
Your iPhone or iPad guides you through a check from your own driveway. No diagnostic experience or appointment required.
Have a compatible adapter?
Start your first scan at home. Stay near the vehicle while connected.
Need an adapter first?
See our recommended hardware ↗ or explore Demo Mode right away.
Ready to connectA little guidance goes a long way.
Follow the ten-step Guided Health Check to capture how your vehicle responds.
Keep the whole picture.
Choose a paid Diagnostic Report. Read it, revisit it, or share a PDF with your mechanic.
FOR THE QUESTIONS BETWEEN SHOP VISITS
A useful tool.
Even before the report.
Take a quick look or dig into the readings. MechaOBD puts your vehicle’s diagnostic information within reach.
See beyond the warning light.
Quick Scan reads stored, pending, and permanent trouble codes—including codes that can stay hidden when the check-engine light is off. Coverage depends on your vehicle.
StoredPendingPermanentThree code categories, one scan
See what’s happening.
View live sensor data or use Manual Capture to record behavior for a closer look.
ENGINE SPEED798 RPMDemo reading
Take the context with you.
Revisit saved reports and export a PDF when you want to share the explanation.
See the sample PDFA REPORT WHEN YOU WANT ONE
Explore your data.
Choose a deeper explanation.
Diagnostic Reports are optional in-app purchases. The price is shown in the app before you buy.
Get closer to your car.
- Stored, pending, and permanent codes
- Live vehicle readings
- Guided Health Check and Manual Capture
- Demo Mode without an adapter
Download pricing is shown on the App Store.
Make sense of the capture.
- Likely causes and the evidence behind them
- Recommended tests and next steps
- A saved report and shareable PDF
YOUR DATA, WITH CLEAR BOUNDARIES
No account required.
Diagnostic records are stored on your device. Vehicle identification and requested AI reports use online services.
What do I need to use MechaOBD?
An iPhone running iOS 18 or later, or an iPad running iPadOS 18 or later, a compatible Bluetooth Low Energy OBD-II adapter, and a compatible vehicle. The adapter plugs into your vehicle’s diagnostic port and is purchased separately.
Can I check my car from home?
Yes. With MechaOBD, a compatible adapter, and a supported vehicle, you can start a scan in your own driveway without an appointment. Stay near the vehicle during the capture and run the engine only outdoors. Internet access is needed for a requested AI Diagnostic Report.
Can it read hidden or permanent codes?
Yes. Quick Scan reads stored, pending, and permanent OBD-II trouble codes where supported. Pending codes may appear before the check-engine light turns on, and permanent codes may remain after it turns off. Permanent codes clear only when the vehicle completes its own checks; reading one does not prove a fault is still active.
Why does my vehicle’s context matter?
A trouble code describes a condition, but the likely causes depend on the car behind it. MechaOBD brings available vehicle details, mileage, and captured readings into its analysis to help explain what to investigate next.
Can I try it without a car or adapter?
Yes. The app has a Demo Mode with a prerecorded example, so you can explore the experience without connecting to a vehicle. You can explore a sample report on this website right now.
What does a Diagnostic Report include?
An AI-generated explanation of your captured vehicle data: an executive summary, system assessments, likely causes, supporting evidence, and recommended next steps. Finished reports can be saved as PDFs. Reports are optional in-app purchases.
Is it a replacement for a mechanic?
MechaOBD helps you understand the data your vehicle makes available. It cannot inspect every component or confirm every fault. A report suggests possibilities and next checks; a qualified mechanic can test and confirm the cause.
Does it need an internet connection?
Most diagnostic functions work locally. Internet access is needed for vehicle identification and requested AI Diagnostic Reports. Your diagnostic records are stored on your device.
Do I need an account?
No account is required to use MechaOBD. You choose whether to request a paid Diagnostic Report, and Apple handles the purchase.
You don’t need to know every code.
Just where to start.
YOUR NEXT STEP STARTS AT HOME
Every car has a story.
Understand yours.
Connect in your driveway. Get to know your car.
Available for iPhone and iPad.
Compatible adapter required · Diagnostic Reports purchased separately