What is DTC?

A DTC is a code generated by the motorcycle's onboard diagnostic system (ECM/ECU) when it detects a malfunction or irregularity in one of the bike’s systems.

These codes help technicians and owners identify what part of the bike is experiencing a problem, such as issues with:

• EngineTransmissionABS (Anti-lock Braking System)
• TPMS (Tire Pressure Monitoring System)
• Body control modules (lighting, instrumentation, etc.)

Diagnosing With Precision

At Hayder's Custom Cycles, with over 23 years of experience in Harley-Davidson service and customization, diagnosing and resolving Diagnostic Trouble Codes (DTCs) is a core part of the precision care we offer to every client.

Using advanced diagnostic tools and deep knowledge of Harley-Davidson systems, our expert technicians quickly identify the root cause of any warning light or system alert.

Whether it’s a sensor malfunction, ECM issue, or something more complex, Hayder's Custom Cycles provides clear, detailed explanations and fast, effective repairs to get your bike running at peak performance.

After We Diagnose Your Bike

At Hayder's Custom Cycles, our commitment to your Harley doesn’t stop once we’ve diagnosed and repaired the issue using DTCs—after-care is just as important as the fix itself.

After every diagnostic service, we provide a detailed breakdown of the trouble codes found, the repairs performed, and what that means for the health of your bike moving forward. We make sure you leave our shop with a full understanding of what was done and why, because informed riders make better long-term decisions for their machines.

As part of our after-care, we also offer follow-up inspections, especially if a complex issue was involved. We’ll recheck your system for any returning codes, verify that all modules are functioning properly, and make adjustments if needed.

We’re happy to schedule periodic preventative maintenance, recommend upgrades that might prevent future faults, and provide rider-specific tuning based on how and where you ride. At Hayder's Custom Cycles, your ride isn’t just a job—it’s part of our legacy.