Frequently Asked Questions about GEARWRENCH Diagnostic Tools

The GEARWRENCH Guide to Automotive Scan Tools

Where can I learn more about the GEARWRENCH Diagnostic tools?
Check out our Featured Tools page for more information.
Do your diagnostic tools come with a warranty?
Our diagnostic tools are covered under a limited 2-year warranty. Please reach out to our dedicated Customer Service team at 877-626-3433 for support.
What causes fault codes to remain uncleared or reappear after being cleared?
When clearing codes, please consider the specific circumstances related to the fault. Typically, there are two types of codes: sporadic codes and actual codes.
Sporadic Codes: These codes usually occur when a component functions irregularly at certain points, possibly due to factors such as electromagnetic interference, vibration, or poor wiring contact. These codes can usually be cleared directly.
Actual Codes: These codes occur when components have genuinely failed. Before clearing these codes, ensure that you have addressed the underlying issue. If the fault lights reappear after code clearance, it indicates that the faults have not been addressed.
What causes the fault light to illuminate during diagnosis?
During diagnosis, certain Electronic Control Units (ECUs) enter diagnostic mode, causing the corresponding fault light to activate. This light will automatically turn off once the diagnostic process is complete. This occurrence is normal, so there is no need to worry.
Why aren’t there any lights illuminated on my dashboard, yet my GEARWRENCH scanner has detected the presence of DTC codes?
Not all DTC codes will activate the fault lights on the dashboard. The manufacturer determines which faults will trigger the light and which ones won’t. The Electronic Control Unit (ECU) might not have fully determined if this constitutes a fault. Electromagnetic interference or vibrations could potentially mislead the ECU. Typically, in such instances, the ECU will ascertain whether it’s an actual fault after undergoing several cycles of operation.
Are owner's manuals for the GEARWRENCH automotive diagnostic scanners available digitally?
Yes, they are available in our Resource Library under Technical Documents.
Do you have a team that can help with trouble codes?
No, GEARWRENCH sells the scan to diagnose trouble codes and we are not professional mechanics and cannot offer repair advice with trouble codes and live data. The dashboard warning lights alert the driver there is some type of issue with the vehicle.
How do I register my device with AUTOAUTH?
Check out our "Register Your Device" page for easy-to-follow instructions. Please note that only our GWSMART07 & GWSMARTBT are AUTOAUTH ready.