When you encounter module import errors in Node.js, it's important to ensure that the module is properly installed and imported. Here are some steps to help fix common import issues:

1. Ensure that the module has been installed correctly. Open your terminal or command prompt and navigate to your project directory. Check if the required module is present in the "node_modules" folder. You can do this by typing ls (Linux) or dir (Windows), followed by pressing Enter. If the module isn't there, install it using npm with the command:

   npm install <module-name>
   

2. Verify that the module is installed in the correct scope. By default, modules are installed locally for your project. However, if you want to use a global module or share it among multiple projects, you can install it using the --global flag:

   npm install --save-dev <module-name> # for local development
   npm install -g <module-name>      # For global installation
   

3. Check if there are any typos in the import statement. Double-check that you're importing the correct module name, including its case sensitivity.

4. If you're using a framework or library like Express, React, or Angular, make sure to install the appropriate module for server-side rendering or building the user interface respectively. Sometimes these modules come in separate packages.

5. Check your import statements for any syntax errors. Ensure that the import statement follows the correct format:

   const <variable-name> = require('<module-name>');
   

   or if you're using ES6 modules, use this instead:

   import <variable-name> from '<module-name>';
   

By following these steps, you should be able to resolve module import errors in Node.js.