Access a comprehensive offline database of over 18,500 diagnostic trouble codes for cars. Simply enter a fault code to get detailed descriptions without needing an internet connection or car model selection.



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Looking for free obdii trouble codes apps? 19 of our 218+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.



Access a comprehensive offline database of over 18,500 diagnostic trouble codes for cars. Simply enter a fault code to get detailed descriptions without needing an internet connection or car model selection.



Access a comprehensive database of OBD II diagnostic trouble codes. Quickly look up definitions for generic and manufacturer-specific codes without an internet connection. Easily copy and share code descriptions.






Transform your smartphone into a professional car diagnostic tool. Read and clear engine fault codes, monitor real-time sensor data, and perform advanced diagnostics without a mechanic. Supports a wide range of OBD2 compliant vehicles.


This app allows you to scan your car's trouble codes and view live data using an OBD2 Bluetooth adapter. It logs statistics and freeze frames for future reference, storing all diagnostic trouble codes (DTCs) on a server.


This app provides definitions and potential causes for On-Board Diagnostics (OBD) trouble codes. It covers a wide range of generic and manufacturer-specific codes for numerous vehicle models, helping users understand and potentially fix error codes.


Instantly look up your car's check engine codes on the go. Access a vast database of OBD2 codes with descriptions and potential causes for all major manufacturers. Save your search history for quick reference.


This app provides direct access to your BMW or MINI vehicle's systems. Read and clear trouble codes from all control units, monitor real-time sensor values, and control features like exhaust flaps and active sound design. It also supports battery registration, DPF regeneration, and service resets.


Transform your phone into a powerful car diagnostic tool. Read and clear trouble codes, monitor real-time engine data, and track fuel economy. Generate detailed reports for easy sharing and analysis.


This professional car diagnostic app connects to UJS OBDII devices via Bluetooth to read and clear fault codes, monitor real-time vehicle performance, and analyze travel data. It supports multiple languages and offers high-speed, low-power data transmission.


This app translates your car's diagnostic trouble codes into plain language, helping you understand potential issues and their severity. It provides maintenance reminders and offers advanced features like issue forecasting and emissions pre-checks with a premium subscription.


This app turns your smartphone into a powerful OBD2 scan tool. It allows you to read and clear trouble codes, view live data, and generate detailed repair reports for your vehicle. Understand your car's issues and make informed repair decisions.


Unlock hidden features and customize your BMW, MINI, or Toyota Supra. This app allows you to individually configure your vehicle for a personalized driving experience. Requires a compatible OBD adapter.


Transform your smartphone into a powerful car diagnostic tool. Monitor real-time engine data, read and clear trouble codes, and track your vehicle's performance. Customize your dashboard and access repair manuals to understand and fix issues.


This app allows users to perform vehicle diagnostics using their smartphone when paired with a special adapter. It helps identify and clear diagnostic trouble codes, review emissions status, and access live sensor data for faster repairs.


Transform your smartphone into a powerful car diagnostic tool. Easily scan, diagnose, and customize your vehicle's settings. Access advanced features like coding and live data to save time and money on car maintenance.


Transform your phone into a powerful car diagnostic tool. Read and clear trouble codes, monitor live sensor data, and analyze performance with real-time graphs. Get AI-powered insights and detailed vehicle history reports.


This app helps you save money on car expenses by offering cash rewards for driving, diagnosing and clearing engine error codes, and providing DIY repair guides. It also assists in reducing car insurance costs and tracking mileage.


This tool connects to your car's OBD adapter via Bluetooth to collect real-time engine data, read fault codes, and provide solutions. It also records driving data, analyzes performance, and offers a HUD display for a safer and more enjoyable driving experience.


Transform your phone into a powerful car diagnostic tool with this app. It offers comprehensive system scans, full OBDII functionality, and specialized maintenance services for a wide range of vehicle brands. Easily identify issues, access repair data, and generate detailed reports wirelessly.


Diagnose vehicle issues and access repair solutions. This app connects wirelessly to your car's OBDII port to scan and clear trouble codes, monitor battery health, and provide detailed repair reports based on millions of reported fixes.