Harley DTC 4+

Diagnose Trouble Codes

CommandSoft, Inc.

Designed for iPad

    • 2.0 • 9 Ratings
    • $1.99



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.

•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.

What’s New

Version 1.2.0

Version 1.2 updated for latest iOS releases and 2018 with more DTC codes than ever.

Ratings and Reviews

2.0 out of 5
9 Ratings

9 Ratings

dunnke ,

Useless to me

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.



Motordan ,

Harley DTC codes

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.

NV79 ,


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.

App Privacy

The developer, CommandSoft, Inc., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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