GeekOBD-OBD2 Code Reader

Read and clear check engine codes fast, test battery health, watch live data, and track fuel economy with one OBD2 code reader app.

Check engine light on? Need to pass inspection? Fuel economy getting worse for no obvious reason? GeekOBD helps you diagnose the problem before it turns into guesswork or an expensive repair.

GeekOBD turns your phone into a practical OBD2 code reader and car scanner. Plug in a Bluetooth OBD adapter, connect in seconds, and read fault codes with plain-language explanations so you can understand the problem before paying for repairs.

From check engine diagnostics and live data monitoring to battery testing, smog pre-checks, trip logging, and custom HUD gauges, it covers the core tools most drivers want in a portable scanner app.

Compatible with MOBD hardware and ELM327 adapters. Works with most 1996+ OBD2 / EOBD vehicles.

FAULT CODE DIAGNOSTICS

• Read and clear engine fault codes (DTCs)
• Turn off the check engine light after repairs
• View code meaning, symptoms, likely causes, and recommended fixes
• Track code changes over time with cloud monitoring

SPECIALIZED VEHICLE CHECKS

• Emissions pre-inspection based on GB18285 / GB3847 workflows
• Battery health test for discharge, alternator, and charging system
• Throttle carbon deposit check without disassembly
• Sensor monitoring, readiness status, and vehicle noise analysis

FUEL, TRIP, AND DASHBOARD

• Real-time fuel consumption, average fuel use, and cost tracking
• Fuel map visualization and driving behavior analysis
• Full trip logs with GPS route and sensor data overlay
• Custom HUD and dashboard gauges for speed, RPM, coolant temp, and more

DRIVING ASSISTANCE

• Voice alerts based on custom sensor rules
• Dash cam, navigation, and Find My Car support
• Maintenance, inspection, weather, and fuel price reminders

Years of OBD experience, reliable data, and cloud backup for reports and trip history. Download GeekOBD and keep a diagnostic scanner in your pocket.

Continued use of GPS running in the background can dramatically decrease battery life.