2019 Subaru Legacy Won't Start

Common Causes for Your 2019 Subaru Legacy Not Starting and How to Resolve Them

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Reviewed by
Devin Cabugcal
Written by RepairPal Car Genius
Updated January 14, 2025
0%
38% chance it's the
Battery
0%
27% chance it's the
Alternator
0%
20% chance it's the
Starter
0%
15% chance it's
Something else
The most common reasons a 2019 Subaru Legacy won't start are a dead battery, an alternator problem, or failed starter.
  • Battery: A weak or failing battery can result in difficulty starting the engine and electrical system malfunctions.
  • Alternator: A failing alternator can result in insufficient electrical power, leading to battery drain and electrical system malfunctions.
  • Starter: A faulty starter motor or a weak battery can prevent the engine from cranking properly, leading to starting issues.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

What are the initial diagnostic steps to take for a 2019 Subaru Legacy that won't start?

When your 2019 Subaru Legacy refuses to start, the first step is to check the battery, as a dead or weak battery is a common culprit. If the battery appears low, consider jump-starting the vehicle or using a multimeter to measure its voltage. Next, ensure that there is sufficient fuel in the tank, as an empty or nearly empty tank can easily lead to starting problems. If both the battery and fuel levels are adequate, turn your attention to the ignition switch; a malfunction here can prevent the engine from cranking. Following this, inspect the starter motor to confirm it engages when you attempt to start the car, as a faulty starter can also be a significant issue. Additionally, assess the fuel system by checking the fuel pump and filter for proper operation, since any disruptions in fuel delivery can hinder starting. Lastly, examine the spark plugs for wear or dirt, as these components are crucial for ignition. By systematically following these diagnostic steps, you can effectively identify and address the reasons your Subaru Legacy won't start, empowering you to take the necessary actions for resolution.

What are the common problems that could cause a 2019 Subaru Legacy to not start?

When troubleshooting starting issues with a 2019 Subaru Legacy, it's essential to consider several common problems that could be at play. A dead battery is often the first suspect, as it can result from age, extreme weather conditions, or simply leaving the lights on. If the battery is functioning, the next component to check is the starter motor; a faulty starter may fail to crank the engine, leading to frustration. Additionally, fuel system problems, such as a clogged fuel filter or a malfunctioning fuel pump, can prevent the engine from receiving the necessary fuel to start. Ignition switch issues can also be a culprit, as a malfunction here may disrupt the electrical system's engagement. Worn-out spark plugs can hinder ignition, making it difficult for the engine to start. Furthermore, problems within the ignition system, like a faulty ignition coil, can contribute to starting difficulties. Lastly, if the vehicle's security system is malfunctioning, it may not recognize the key, preventing the car from starting altogether. By systematically checking these components, DIY enthusiasts can effectively diagnose and address the starting issues in their Subaru Legacy.

How urgent is it to address the starting issue in a 2019 Subaru Legacy?

When dealing with a starting issue in a 2019 Subaru Legacy, understanding the urgency of the situation is crucial for any DIY enthusiast. The frequency of the problem plays a significant role; intermittent issues may allow for a more measured response, while consistent failures demand immediate attention. Additionally, the severity of accompanying symptoms, such as unusual noises or warning lights, can indicate deeper mechanical problems that could compromise vehicle safety. If the starting issue leads to stalling or difficulty starting in critical moments, it poses a direct risk to both the driver and passengers, necessitating prompt action. Furthermore, neglecting these symptoms can result in more extensive damage over time, leading to costly repairs that could have been avoided with timely intervention. Therefore, it is advisable to assess the situation carefully and, if necessary, consult a qualified mechanic to ensure that the starting issue is addressed appropriately and safely.

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2019 Subaru Legacy Won't Start: Causes & Solutions