To resolve the issue of being unable to log into the Speedway Fuel app and not generating a verification code, follow these detailed steps:

1. Verify Your Phone Number:
Ensure that the phone number associated with your Speedway account is correct. Sometimes, if you've recently changed your phone number or entered it incorrectly when signing up, the app won’t be able to send the verification code. Double-check the number in your account settings or any correspondence from Speedway - learn more.

2. Check Network Connection:
Confirm that your device has a stable internet or cellular connection. Poor connectivity can impede the app's ability to communicate with Speedway's servers, preventing the verification code from being sent.

3. Resend Code:
After verifying your number and connection, attempt to resend the verification code. There’s usually an option in the app to "send code" again. This can clear up any temporary issues with receiving texts.

4. Update the App:
Make sure you have the latest version of the Speedway Fuel app installed. Outdated versions may contain bugs that could interfere with the login and code generation process. You can check for updates in the Google Play Store or Apple App Store - learn more.

5. Clear App Cache and Data:
If you are still facing issues, clear the app cache and data:
- For Android: Go to Settings > Apps > Speedway Fuel > Storage > Clear Cache and Clear Data.
- For iOS: You may need to uninstall and reinstall the app, as iOS does not have a direct cache clearing option.

6. Reinstall the App:
Sometimes, a fresh installation can resolve lingering issues. Delete the app and reinstall it from the relevant app store.

7. Check for Service Outages:
Visit Speedway's official website or social media channels to check if there are any reported outages or issues affecting app functionality. Sometimes widespread issues can lead to login and code generation problems - learn more.

8. Contact Customer Support:
If none of the above solutions work, reach out to Speedway customer support. They can provide specific assistance for account-related issues, including verification code problems. You can find contact details on their website - learn more.

Following these steps should help you log into the Speedway Fuel app and resolve the code generation issue. If the problem persists, professional support will be your best recourse.