Quick answers to the most common questions about OBD Scan Pro.
🚗 Getting Started
What OBD-II adapter do I need? ▼
OBD Scan Pro works with ELM327-compatible adapters that support WiFi or Bluetooth Low Energy (BLE). We recommend adapters that support ELM327 v1.5 or higher for best compatibility. Popular options include Vgate iCar Pro, OBDLink MX+, and generic ELM327 WiFi adapters. Classic Bluetooth adapters are not supported on iOS — only WiFi or BLE.
How do I connect my adapter? ▼
WiFi adapters: Plug the adapter into your car's OBD-II port, go to iPhone Settings → WiFi, connect to the adapter's network (usually named "WiFi_OBDII" or similar), then open OBD Scan Pro and tap Connect.
BLE adapters: Plug in the adapter, ensure Bluetooth is enabled on your iPhone, open OBD Scan Pro, and the app will automatically discover nearby BLE devices. Select your adapter from the list.
Where is the OBD-II port in my car? ▼
The OBD-II port is typically located under the dashboard on the driver's side, near the steering column. It's usually within arm's reach from the driver's seat. Some vehicles may have it behind a small panel or cover. Check your vehicle's owner manual if you can't locate it. All vehicles manufactured after 1996 (US) or 2001 (EU) are required to have an OBD-II port.
Which vehicles are supported? ▼
OBD Scan Pro supports all OBD-II compliant vehicles, which includes most cars and light trucks manufactured after 1996 (USA), 2001 (EU petrol), and 2004 (EU diesel). This covers all major brands including BMW, Mercedes, Toyota, Honda, Ford, Chevrolet, Nissan, Hyundai, Kia, VW, Audi, and many more. The app communicates using standard OBD-II protocols (ISO 9141, KWP2000, CAN, J1850).
🤖 Features & Usage
What does the AI Diagnosis feature do? ▼
The AI Diagnosis feature analyzes your vehicle's diagnostic trouble codes (DTCs) and sensor data using artificial intelligence to provide:
• Root cause analysis — Identifies the most likely cause of the issue
• Repair recommendations — Step-by-step guidance on how to fix the problem
• Cost estimates — Approximate repair costs for parts and labor
• Severity assessment — How urgent the repair is
This feature requires a Premium subscription and an active internet connection.
How do I clear a check engine light? ▼
After connecting to your vehicle, go to the DTCs tab to see all active trouble codes. Review them first, then tap the "Clear Codes" button. This will reset the check engine light and clear stored DTCs. Important: Clearing codes does not fix the underlying issue. If the problem persists, the check engine light will return. We recommend using the AI Diagnosis feature to understand the issue before clearing.
How do I generate a PDF report? ▼
After performing a scan, tap the "Generate Report" button. You can customize the report with your company logo, customer information, and technician notes. The PDF includes all DTCs, live sensor readings, AI analysis results, and VIN details. Reports can be shared via email, Messages, AirDrop, or saved to Files. This feature is available with a Premium subscription.
What live data can I monitor? ▼
OBD Scan Pro can display 50+ real-time parameters including:
• Engine RPM, Vehicle Speed, Throttle Position
• Coolant Temperature, Oil Temperature, Intake Air Temp
• Fuel Pressure, Fuel Level, Fuel Trims (Short/Long Term)
• MAF Sensor, MAP Sensor, O2 Sensors
• Battery Voltage, Engine Load, Timing Advance
• Boost Pressure (for turbo vehicles)
Available parameters depend on your vehicle's ECU capabilities.
💳 Subscription & Billing
How much does Premium cost? ▼
OBD Scan Pro Premium is available for $2.99/month. The subscription auto-renews monthly and can be cancelled at any time. Premium unlocks AI Diagnostics, PDF Reports, Performance Testing, Fuel Economy Tracking, Driving Alerts, Maintenance Scheduling, and Vehicle Control features.
How do I cancel my subscription? ▼
To cancel your subscription:
1. Open Settings on your iPhone
2. Tap your Apple ID at the top
3. Tap Subscriptions
4. Find OBD Scan Pro and tap it
5. Tap Cancel Subscription
You'll continue to have access to Premium features until the end of your current billing period. No partial refunds are given for unused time.
How do I restore my purchase on a new device? ▼
Open OBD Scan Pro on your new device and navigate to the Premium screen. Tap "Restore Purchases". Make sure you're signed in with the same Apple ID you used for the original purchase. Your subscription will be restored automatically. If it doesn't work, try restarting the app or signing out and back into your Apple ID.
What's included in the free version? ▼
The free version includes:
• Read & Clear DTCs — View and clear diagnostic trouble codes
• Basic Live Data — Monitor essential engine parameters
• WiFi & BLE Connection — Connect to any compatible adapter
• VIN Decoding — Identify your vehicle's details
Premium features like AI Analysis, PDF Reports, Performance Testing, and more require a subscription.