2016 Subaru Forester Won't Start

Common Causes for Your 2016 Subaru Forester 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 2016 Subaru Forester 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 due to insufficient power supply.
  • Alternator: A failing alternator can result in insufficient electrical power to the vehicle, 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.

How urgent is it to address the starting issue in a 2016 Subaru Forester?

Addressing the starting issue in your 2016 Subaru Forester is crucial and should be treated with urgency. Starting problems can escalate quickly, leading to unexpected breakdowns that may leave you stranded or unable to use your vehicle when you need it most. Moreover, neglecting these symptoms can result in further damage to the vehicle's electrical system or starter components, which could lead to more extensive and costly repairs down the line. It’s essential to recognize that what may seem like a minor inconvenience today could evolve into a significant safety risk tomorrow. Therefore, if you notice any signs of trouble when starting your Forester, such as unusual noises, slow cranking, or dashboard warning lights, it is highly advisable to consult a qualified mechanic as soon as possible. Taking prompt action not only ensures your vehicle remains reliable but also protects your investment in the long run.

What are the initial diagnostic steps to take when a 2016 Subaru Forester won't start?

When your 2016 Subaru Forester won't start, it's essential to adopt a methodical diagnostic approach to identify the underlying issue. Begin by checking the battery, as it is often the primary culprit in starting problems. Use a voltage meter or an OBD II scanner to assess the battery's health and ensure it has sufficient charge. Next, inspect the battery cables for secure connections and signs of corrosion, as these can impede power delivery. If the battery appears functional, turn your attention to the ignition coil, which can also prevent the engine from starting if faulty. Testing this component is relatively straightforward and may require replacement if it fails. Additionally, consider the alternator's condition, as a malfunctioning alternator can lead to battery drainage, even if the battery itself seems fine. If these initial checks do not resolve the issue, it may be time to consult a professional mechanic or a Subaru dealership, as they possess the specialized tools and expertise necessary for more complex diagnostics. By following this structured approach, you can effectively troubleshoot the starting problem and determine the best course of action.

What are the common problems that could cause a 2016 Subaru Forester to not start?

When your 2016 Subaru Forester refuses to start, several common problems may be at play. One of the most frequent culprits is a weak or dead battery, which can lose its ability to hold a charge over time, particularly in colder weather. If the battery is not providing sufficient power, the engine may not crank at all. Additionally, fuel delivery issues can hinder the starting process; if the fuel pump is malfunctioning or there are clogged fuel filters, the engine may not receive the necessary fuel to ignite. Another potential issue is related to the coolant bypass valve, which, if faulty, can disrupt the start-stop function and lead to unexpected engine shutdowns. By understanding these common problems, you can take the first steps toward diagnosing and resolving the starting issues with your Subaru Forester, ensuring a smoother DIY repair process.

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