How to Check Codes on Harley Motorcycles


Knowing how to check codes on Harley motorcycles is a critical skill to have for motorcycle owners. In this article, we’ll go over the basics of the CKP – Crank Position Sensor – and the Diagnostic Link connector. You’ll also learn about using a motorscan wireless adapter. The following video tutorials will walk you through how to check codes and clear them. After watching the video, you’ll have a better understanding of the underlying cause of the problem.

CKP – Crank Position Sensor

A malfunctioning CKP – Crank Position Sensor (CPS) on a Harley-Davidson motorcycle can result in acceleration performance issues, cylinder misfiring, and other problems. This malfunction delays the processing of information received by the motorcycle’s computer, causing misbehavior with the accelerator. In turn, the gas isn’t pumped into the engine efficiently, reducing gas mileage.

There are a number of symptoms of a bad crank position sensor, though the older models are more likely to be affected. The first symptom of a bad sensor is a PO374 error code. A PO374 error code means that the engine position sensor is not receiving pulses from the powertrain control module. Other causes for this code include contaminated oil and a wiring issue. In rare cases, the sensor may even turn off entirely while the engine is running.

Diagnostic link connector

If you need to diagnose your Harley Davidson vehicle, it is time to get a diagnostic link connector. These devices connect to your bike’s on-board computer and are compatible with Windows 7 and 8.1 operating systems. They also include software and hardware for the entire diagnostic testing process. In addition to a USB cable, these tools will also allow you to test the on-board electronics, sensors, and actuators. To get started, follow these easy steps.

To connect your Harley to your car, you must first locate the diagnostic port. For 2001-2007 Touring bikes, it is located behind the left side cover. On 2007 and 2008 models, it is located beneath the seat. On Softail and V-Rod models, it is located between the frame and the forks. You can also locate the diagnostic port by removing the left-hand side cover. In order to install the diagnostic link connector, you must follow the manufacturer’s instructions.

Using a motorscan wireless adapter

Using a Motorscan wireless adapter to check codes on your Harley can save you thousands of dollars in the long run. This plug-in diagnostic tool is available for free as an APP and is compatible with most Harley-Davidson models. The adapter will let you clear the check engine light and read trouble codes. Note that some Harley-Davidson models may not be compatible with aftermarket injection mapping.

The adapter is a patent-pending design that can be used on motorcycles from 2001 to 2015. Future updates will make the device compatible with newer models. To use the adapter, download the Motorscan app, which is available for iPhone and Android devices. Simply plug the adapter into your Harley’s diagnostic port and you’re ready to go. You can also clear trouble codes, lookup your motorcycle’s VIN number, and view different parameters of various bike systems.

Clearing codes

If your Harley is giving you trouble, you should understand how to clear diagnostic trouble codes. These codes can contain a variety of numbers and letters, but they are all related to your motorcycle’s problem. If you have the right equipment and know how to read them, clearing codes on your Harley should be easy. Read on for a step-by-step procedure to clear codes on your Harley. However, keep in mind that clearing codes will not fix the problem if they come back later.

There are two types of DTCs (Digital Trouble Codes) in your Harley: pending and historic. Pending codes are those that have not been resolved yet and will remain saved until you intentionally clear them. You can clear codes by using the trip reset button, but you should only do it if you are a professional technician or a dealership employee. There is no need to worry if you don’t know much about the procedure as it can be done with the help of a Harley mechanic or dealership technician.

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