# Harley DTC — Diagnose Trouble Codes > Harley Davidson Diagnostic Trouble Code lookup and resolution guide. (iPhone/iPad app by CommandSoft, Inc..) - Source: https://appshunter.io/ios/app/harley-dtc/id460444299 (this page in markdown: same URL + `.md`) - Developer: [CommandSoft, Inc.](https://appshunter.io/developer/444823765) - Category: Reference, Utilities - Price: $1.99 - Rating: 2.00/5 from 9 App Store ratings · 12 written reviews indexed - Age rating: 4+ - Requires: iOS 11.0 · 7 MB - Languages: American English, Dutch, French (France), German (Germany), Italian, Japanese, Korean, European Portuguese, Russian, Chinese (Simplified, China) and 1 more - Released: 2011-09-02 - Data updated: 2026-06-10 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/harley-dtc/id460444299/reviews.md ## What is Harley DTC? This application was developed for iOS devices running version 11 or newer and functions with any iOS device and updated for 2018 with more DTC codes than ever. This application is designed for Harley Davidson owners to lookup Diagnostic Trouble Codes (DTCs) that are reported by the engine and read about what they mean and possible causes and resolutions. Here is how it works. You run Harley DTC and enter the DTC code you wish to lookup. The application finds the closest match and brings up a list of all codes. From there you can enter a detail screen showing the code and useful definitions. You also can then read the documentation from the main page to read more about the codes, possible causes and resolutions. FEATURES •Easy to use simple DTC code lookup. •Complete DTC code list with detail views. •Startup engine sound that can be disabled in settings. •Documentation table of contents covering Basics, Resolving Problems, Speedometer Self Diagnostics, Harley Davidson Definitions, Speedometer BUS Er, Engine Won’t Start, Crank Position Sensor, and Ignition Coil. ## Key features - Easy DTC code lookup - Complete DTC code list - Detailed code definitions - Possible causes and resolutions - Comprehensive documentation ## Recent user reviews (10 of 12) All indexed reviews: https://appshunter.io/ios/app/harley-dtc/id460444299/reviews.md ### 1/5 — Harley DTC *2021-08-14* useless application don't waste money ### 1/5 — Ios11 *2017-10-01* Must not be supported anymore, because there’s no iOS 11 update and it will not work anymore. I will leave it on my phone for few more weeks to see if they update the app. If not, I’ll just remove it and look up codes individually on the Internet. ### 2/5 — Useless to me *2015-12-12* Found none of the following information read from the vehicle. Does not appear to be updated for the newer bikes at all (In fairness I don’t have the EDM in front of me to compare it but I know these codes are for fan voltages/cooling for the newer bikes so. . .) Money is better spent ordering the Electrical Diagnostic Manual (EDM) for your Year/Model bike. Nice concept, not updated, waste of money. 2015 FLTRUSE: ECM P0691 P1919 P1691 P1693 Pn001234-01 SPDO 61213 Pn70900293a ### 1/5 — Waste my of money *2015-09-20* None of the 4 codes I need to look up found. A complete waste of time and money! ### 3/5 — Harley DTC codes *2015-09-02* I purchased the app just today at the suggestion of my local Harley dealer. I found all the codes I needed to diagnose the electrical problem on my 2011 Heritage Softail. My only complaint is the description was not through. The app noted "low battery voltage" but I had to go online to get a complete description of my problem. The app points you in the right direction but from the information it appears someone went on coffee break and forgot to complete the data when they returned. This app has the potential to really be an asset to Harley riders. Hoping an update will correct the deficiencies. ### 2/5 — Incomplete code list *2013-06-30* Nice try but 5 out of the 6 codes I was looking were not listed: B1101 B2112 B2151 B2156 B2166 For a paid app I would expect the list contains all codes. Lets hope there is an update soon! ### 4/5 — GREAT App Well Worth it!!! *2013-06-11* Very helpful, simple and reasonably priced! ### 1/5 — Not worth it. *2012-07-20, version 1.1.0* Doesn't display enough of the codes. I work at Harley shop and wanted to test it out for home. First three codes I put in weren't even available. However it did get the next two. Still no updates at all. Keep looking for a different program. ### 3/5 — Handy *2012-01-29* I've checked codes from 2005 FLSTN to 2009 XR1200. Though it doesn't explain everything like what the module abbreviations stand for. When switching from landscape it doesn't format or scroll. Keep it in portrait and tiny writing is about it. But it was only .99 and can get codes and clear friends bikes, so get it. ### 2/5 — Not very complete *2012-01-15* Should give idea of what to look for after receiving a code to solve problem ## Frequently asked questions about Harley DTC ### What is Harley DTC? Harley DTC is a reference application designed for Harley Davidson owners to look up Diagnostic Trouble Codes (DTCs) reported by their motorcycle's engine. It provides definitions, potential causes, and suggested resolutions for these codes. ### What devices does Harley DTC support? Harley DTC is available for iOS devices, including iPhone, iPad, and iPod. It requires iOS version 11 or newer. ### How much does Harley DTC cost? Harley DTC is a paid application, priced at $1.99. There are no in-app purchases or subscriptions required. ### Does Harley DTC have ads? No, Harley DTC does not contain advertisements. It is a paid application that offers an ad-free experience. ### When was Harley DTC last updated? The latest version of Harley DTC, 1.2.0, was last updated on November 1, 2018. The app was originally released on September 2, 2011. ### What kind of information is in the Harley DTC documentation? The documentation within Harley DTC covers a range of topics, including DTC basics, problem resolution, speedometer self-diagnostics, specific Harley Davidson definitions, and troubleshooting for issues like the engine not starting. ### Is Harley DTC suitable for all ages? Harley DTC has an age rating of 4+, making it suitable for a wide audience. The content is informational and related to motorcycle maintenance. ### Can Harley DTC diagnose codes from other motorcycle brands? No, Harley DTC is specifically designed for Harley Davidson motorcycles and their unique Diagnostic Trouble Codes (DTCs). It is not intended for use with other brands. ## Version history (last 3 releases) ### 1.2.0 — 2018-11-01 Version 1.2 updated for latest iOS releases and 2018 with more DTC codes than ever. ### 1.1.0 — 2012-01-28 We have doubled the DTC codes. These were all available as of January 2012. ### 1.0.0 — 2011-09-01 No release notes. --- *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 2026-06-10.*