P179D The redundancy system for DIRECT SELECT was activated. There is a signal above the permissible limit value.

It seems you're encountering an error message related to a system or device, specifically mentioning the redundancy system for something referred to as "DIRECT SELECT" being activated due to a signal exceeding permissible limits. Here's how you can approach this issue:

1. **Identify the System**: Determine what "DIRECT SELECT" refers to. It might be part of a specific system in a car, industrial machinery, or another device.

2. **Review Error Message**: Look up the error code P179D and any associated manual or online resources to understand its significance. This will help you know if it's related to measurements, performance, or safety.

3. **Consult Documentation**: Check the user manual or manufacturer guidelines for your system. They might provide troubleshooting steps or safe reset procedures.

4. **Check Connections and Sensors**: Ensure all connections are secure. Loose wires or faulty sensors can cause false readings or trigger redundancy systems.

5. **Verify Measurements**: If it's a measurement-related error, ensure that sensors and instruments are functioning correctly and reading within acceptable limits.

6. **Consider Software Issues**: Check for any software updates or malfunctions that might be causing the system to react unnecessarily. Updating or reinstalling software could resolve the issue.

7. **Environmental Factors**: Investigate if environmental conditions like temperature or vibrations are affecting the system's performance.

8. **Safety First**: If the error indicates a dangerous condition, follow safety protocols before attempting any repairs. Resetting the system should only be done when it's safe to do so.

By systematically addressing each of these areas, you can work towards resolving the issue with the P179D error. If self-help strategies don't suffice, consider seeking professional assistance to ensure the problem is handled safely and effectively.