# OBD2 Code > Reference guide for vehicle Diagnostic Trouble Codes (DTCs). (iPhone/iPad app by Liang-Hung Publishing.) - Source: https://appshunter.io/ios/app/obd2-code/id492632063 (this page in markdown: same URL + `.md`) - Developer: [Liang-Hung Publishing](https://appshunter.io/developer/340127474) - Category: Reference, Books - Price: Free - Rating: 3.30/5 from 3 App Store ratings · 23 written reviews indexed - Age rating: 4+ - Requires: iOS 6.0 · 2 MB - Languages: American English, Chinese (Simplified, China), Chinese (Traditional, Taiwan) - Released: 2012-01-10 - Data updated: 2026-06-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/obd2-code/id492632063/reviews.md ## What is OBD2 Code? Standard Diagnostic Trouble Codes reference book. A Diagnostic Trouble Code is set in a vehice's onboard computer when a fault occurs in any monitored system. The code number corresponds to the type of fault, and can be used to diagnose the problem. ## Key features - Diagnostic Trouble Code reference - Vehicle fault code lookup - Problem diagnosis aid ## Recent user reviews (10 of 23) All indexed reviews: https://appshunter.io/ios/app/obd2-code/id492632063/reviews.md ### 4/5 — Translates codes 👍 *2018-01-28, version 1.3* Just needed a simple code lookup. This works great! ### 4/5 — Good and FREE *2016-04-09, version 1.3* Just "bought" this. Looked up what my car was saying p2269, water in fuel. It told me that. Other apps you have to pay for it. Definitely worth a download. ### 1/5 — Crashes instantly *2015-04-06, version 1.0* 4 months now and no fix !!!! Crashes instantly . Removed and reinstalled and it still crashes instantly . " It use to run great and be a valuable tool . Now it just crashes instantly with iOS 8 please fix" ### 1/5 — Will not open *2015-03-04, version 1.0* Keeps on crashing. ### 1/5 — Scrim1972 *2015-02-13, version 1.0* Load of mince don't even work won't load up at all DONT DOWNLOAD THIS ITS BROKEN ### 1/5 — Crashes as soon as I open *2014-12-13, version 1.0* I guess it doesn't work on iOS 8...:( ### 1/5 — Doesn't work *2014-11-15, version 1.0* Program does not launch. Crashes. ### 1/5 — Crashes on Launch *2014-09-22, version 1.0* Doesn't work on ios8 ### 1/5 — Do not work *2014-07-19, version 1.0* Do not work ### 5/5 — Easy and Simple *2013-12-10, version 1.0* Easy to use, very basic. Type in code and it tells you what it is. I'm a mechanic and I love it for simple diagnosis. While it does not replace a good scan tool, it is great for easy reference on the go. ## Frequently asked questions about OBD2 Code ### What is OBD2 Code? OBD2 Code is a reference book for standard Diagnostic Trouble Codes (DTCs). It explains what each code number signifies when a fault occurs in a vehicle's onboard computer system. ### How does OBD2 Code help diagnose car problems? When a vehicle's onboard computer detects a fault, it sets a Diagnostic Trouble Code. OBD2 Code allows you to look up this code number to understand the type of fault, which is the first step in diagnosing the problem. ### What devices does OBD2 Code support? OBD2 Code is available for iPhone and iPod devices. ### What is the age rating for OBD2 Code? OBD2 Code has an age rating of 4+, making it suitable for a wide range of users. ### How often is OBD2 Code updated? The latest version, 1.3, was released on November 13, 2015. It has not been updated since then. ### What is the user rating for OBD2 Code? OBD2 Code has a rating of 3.3 stars based on 3 user ratings. ### Is OBD2 Code free to use? Yes, OBD2 Code is available for free and does not have any in-app purchases or ads. ## Version history (last 2 releases) ### 1.3 — 2015-11-13 This app has been updated by Apple to display the Apple Watch app icon. support iOS9 (database structure changed, please reinstall app) ### 1.0 — 2012-01-09 No release notes. ## Apps similar to OBD2 Code | App | Rating | Price | Category | | --- | --- | --- | --- | | [Xm Diagrams](https://appshunter.io/ios/app/xm-diagrams/id1537327999) | 3.0 (1) | Free | Reference | | [HF Beam Antenna Calculator](https://appshunter.io/ios/app/hf-beam-antenna-calculator/id479135673) | 4.0 (3) | $0.99 | Reference | | [Antique Identifier‧ By Picture](https://appshunter.io/ios/app/antique-identifier-by-picture/id6749515905) | 5.0 (3) | Free | Reference | | [Car parts for Honda (EPC)](https://appshunter.io/ios/app/car-parts-for-honda-epc/id6504272457) | — | $2.99 | Reference | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-05.*