If you own a Flex Fuel Toyota Tundra, you might have encountered hard starting, rough idling, poor gas mileage, and strong fuel smells. This is often caused by a high alcohol percentage reading in the engine control module (ECM), even if you’ve never used E85. Dealership repairs can be expensive and backordered. Fortunately, a Cheap Scan Tool Capable Of Ecm Reset, like the Launch X431 CRP919E, provides a DIY solution.
Resetting Fuel Density with an Affordable Scan Tool
Toyota issued Technical Service Bulletin (TSB) 0166-19 to address this issue, but the fix often involves costly fuel pump replacement and doesn’t always guarantee a permanent solution. Resetting the alcohol fuel density level to zero offers a temporary, and sometimes long-term, fix. While some Tundra owners use Techstream cables with potentially unlicensed software, this can lead to compatibility issues and frustration. A more reliable and user-friendly option is a budget-friendly bidirectional scan tool capable of ECM reset.
Image: Launch X431 CRP919E bidirectional scan tool.
Launch X431 CRP919E: A Cost-Effective Solution
The Launch X431 CRP919E is a cheap scan tool capable of ECM reset that offers a practical alternative. This bidirectional scanner allows you to read and reset the alcohol percentage level in your Tundra’s ECM. Other seemingly comparable scanners, like the XTOOL D7 and D8, currently lack this functionality for Tundras.
How to Reset Alcohol Fuel Density with the Launch X431 CRP919E
Before using the Launch X431 CRP919E, ensure you’ve installed all the latest software updates, especially for the Toyota-specific special functions. Connect the scanner to your Tundra’s OBD-II port and follow these steps:
- Diagnose: Enter the diagnostic mode.
- System Selection: Select “Toyota.”
- ECM/ECT Selection: Choose “ECM-ECT (engine).”
- Special Functions: Navigate to the special functions menu.
- Fuel Density Learning Value Reset: Select and run this function.
The reset process takes only a few seconds and sets the alcohol level back to zero. This simple procedure can resolve hard starting, improve fuel economy, and smooth out engine performance.
Image: Connecting an OBD2 scanner to a vehicle’s diagnostic port.
Long-Term Solution or Temporary Fix?
While resetting the alcohol fuel density may provide a long-term solution for some, others might find the issue returns. The Launch X431 CRP919E allows for easy and quick resets whenever necessary, making it a valuable tool for Flex Fuel Tundra owners. Moreover, its versatility extends beyond this specific function, enabling diagnostics and resets for other vehicle makes and models.
Image: Example of illuminated warning lights on a car’s dashboard.
Conclusion
A cheap scan tool capable of ECM reset, like the Launch X431 CRP919E, offers a cost-effective and convenient solution to address the common alcohol percentage issue in Flex Fuel Toyota Tundras. This tool empowers owners to perform the reset themselves, saving on potentially expensive dealership visits and minimizing downtime. If you’re experiencing Flex Fuel related problems, investing in a capable scan tool like the Launch X431 CRP919E can be a worthwhile investment.
