Avto Test PRO

You sit down, turn the key, and the dashboard lights up. But which of those icons means your brake fluid is low, and which one signals a failing alternator? Most drivers guess. That guess can cost you a tow truck, a repair bill, or worse—a breakdown on the highway. Avto Test PRO replaces that guesswork with a direct, diagnostic pipeline to your car’s brain. It turns your phone into a garage-grade scanner that reads, clears, and explains error codes without the mechanic’s markup.

Core Diagnostic Engine

The app connects via an OBD-II Bluetooth adapter to pull real-time data from your vehicle’s ECU. It supports all OBD-II protocols (ISO 9141-2, KWP2000, CAN, J1850 VPW/PWM) and works with any car manufactured after 1996. Once paired, you see a live dashboard of engine RPM, coolant temperature, intake air temperature, throttle position, calculated load value, and fuel trim. The main screen displays a color-coded list of Diagnostic Trouble Codes (DTCs): green for pending codes, yellow for stored codes, and red for permanent failures.

Code Library and Repair Guidance

Tap any DTC to open a detailed explanation. The built-in library contains definitions for over 5,000 generic and manufacturer-specific codes (P0xxx, P1xxx, Uxxxx, Bxxxx, Cxxxx). Each entry includes:
- Code definition (e.g., P0420: Catalyst System Efficiency Below Threshold)
- Common symptoms (rough idle, check engine light, reduced fuel economy)
- Likely causes (faulty oxygen sensor, exhaust leak, failed catalytic converter)
- Suggested repair steps in plain, actionable language

Data Logging and Export

Run a live diagnosis while driving. The app records up to 12 simultaneous PIDs at a configurable refresh rate (100ms to 5 seconds). Logs are stored as CSV files with timestamps, GPS coordinates (if enabled), and throttle position. Export them via email, Google Drive, or any file manager. This data is useful for tracking intermittent issues, monitoring performance mods, or sharing with a remote mechanic.

Sensor Simulation and Testing

Switch to Sensor Test Mode to verify component operation without starting the engine. The app sends a test signal to the O2 sensor, MAF sensor, or EVAP system and displays the response curve. If the curve stays flat, the sensor is dead. If it spikes erratically, the wiring is corroded. This mode also includes a fuel system monitor that cycles the purge valve and leak detection pump for EVAP integrity checks.

Vehicle Information and Maintenance Logs

The VIN Decoder extracts manufacturer, model year, engine type, and transmission details from the vehicle identification number. Save up to 10 separate vehicle profiles with custom names and notes. Each profile tracks:
- Mileage-based service intervals (oil change, spark plugs, air filter, timing belt)
- Historical DTC logs with date and mileage stamps
- Custom reminders for tire rotation, brake fluid flush, and coolant replacement

Performance Metrics and Gauges

Configure a custom gauge cluster with up to 8 gauges on a single screen. Choose from analog dials, digital readouts, or bar graphs. Gauges display:
- Boost pressure (for turbocharged engines)
- Air-fuel ratio (lambda value)
- Ignition timing advance
- Voltage from the battery and alternator
- Fuel pressure (requires additional sensor)
- Exhaust gas temperature (requires EGT probe)

Compatibility and Permissions

• Android 7.0 and above (API 24+)
• Works with ELM327 v1.5 and v2.1 Bluetooth adapters (recommended), as well as WiFi and USB adapters
• No root access required for standard OBD-II functions

• Permissions: Bluetooth (for adapter pairing), Location (for GPS tagging logs), Storage (for CSV exports and backups)

• Connects to any OBD-II compliant vehicle

• Reads and clears all DTC codes
• Live data dashboard with customizable gauges
• CSV logging with GPS coordinates
• Sensor simulation and EVAP test mode
• VIN decoder and multi-vehicle profiles
• Maintenance reminder system with mileage tracking
• Export logs for remote mechanic sharing

Download Avto Test PRO now. Stop paying for scans that take thirty seconds. Own the data your car generates every mile.

Disclaimer: This app requires an external OBD-II Bluetooth adapter (not included) and an active internet connection for code definitions and updates. In-app purchases are available for advanced sensor simulation profiles and unlimited vehicle profiles. Diagnostic results are for informational purposes only and do not replace professional mechanical inspection.