Why Won't My Subaru Legacy Turn On? A Comprehensive Guide

Running into issues with your Subaru Legacy not turning on can be frustrating. Whether you're late for an important meeting or just need to start your day, the inability to start your car is a significant inconvenience. This article aims to provide you with a comprehensive guide to diagnose and resolve the common issues that prevent your Subaru Legacy from turning on. By identifying the root causes, you can take the necessary steps to get your car running smoothly again.

Introduction to Common Issues

The Chicago Tribune highlights nine common reasons why a car won't start. While this list offers valuable insights, there are a few additional errors that can also cause your Subaru Legacy to fail to start. This guide will explore these issues and provide practical solutions to help you get your car back on the road.

1. Auto-Transmission Left in Any Gear but “P”

One of the most common reasons your Subaru Legacy won't turn on is leaving the auto-transmission in any gear other than "P" (Park). Modern vehicles are designed to prevent the engine from starting when the transmission is not in Park. This safety feature ensures that the car is secure and reduces the risk of injury. If you've accidentally left the transmission in a different gear, simply shift it to Park and try starting the car again.

2. Faulty Fuel Pump or Starter Fuse

The fuel pump and starter fuse are critical components in starting your car. If either of these parts is faulty, the entire process can be disrupted. The fuel pump provides the necessary fuel to the engine, while the starter fuse ensures that the starter motor receives the electrical current it needs.

Here's a step-by-step guide on how to check these components:

Check the starter fuse: Locate the fuse box, typically under the dashboard or in the engine compartment. Identify the fuse related to the starter and check if it is blown or burnt out. Replace the faulty fuse if necessary.

Detect fuel pump failure: If the fuel pump is failing, the car might not have enough fuel to start. Listen for a clicking sound from the fuel pump when you try to start the car. If you hear no sound or a faint click, the fuel pump is likely faulty. Replacement of the fuel pump may be necessary.

3. Faulty Fuel Tank Cap

Another common issue that can prevent your Subaru Legacy from starting is a faulty fuel tank cap. The cap serves as a seal to prevent vapor lock, which occurs when excess fuel vapor is trapped in the fuel line. This can disrupt the fuel flow, preventing the car from starting.

Here's how to check and replace your fuel tank cap:

Inspect the cap: Check the cap for any signs of damage or cracks. A faulty cap may not close properly, leading to vapor lock.

Replace the cap: If the cap is damaged or not functioning properly, replace it with a new one. Make sure to follow the manufacturer's guidelines to ensure a proper fit and seal.

4. Using Wrong Car Keys

If you have multiple vehicles with similar keys, it's easy to use the wrong key. Using the incorrect key can result in the car failing to start. This issue often arises due to confusion or simply forgetting which key belongs to which vehicle.

To avoid this problem, consider the following steps:

Label your keys: Clearly mark your keys with the make and model of your vehicles. This can help you easily identify which key is for your Subaru Legacy.

Store keys separately: Keep the keys for your various vehicles in separate containers or locations to avoid mix-ups.

Employ a robust key management system: Consider using a keychain fob or a digital key management app to keep track of your keys.

Conclusion

In summary, several factors can lead to your Subaru Legacy failing to turn on. By understanding and addressing these common issues, you can take proactive steps to avoid these problems in the future. Whether it's a faulty fuel pump, a blown starter fuse, a faulty fuel tank cap, or the use of the wrong car keys, taking the necessary steps to diagnose and resolve these issues can save you time and frustration. Always refer to your owner's manual for specific instructions and guidelines on troubleshooting your Subaru Legacy.