2017 Toyota Avalon Won't Start

Resolve Starting Issues for Your 2017 Toyota Avalon

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Reviewed by
Andrew Hajjar
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 2017 Toyota Avalon 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 2017 Toyota Avalon that won't start?

When your 2017 Toyota Avalon 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 fine, inspect the fuel level to confirm there’s enough gas in the tank. Next, verify the ignition switch; a malfunction here can prevent the engine from turning over. If these initial checks don’t reveal the problem, examine the starter motor for any signs of failure, such as a clicking sound without engine movement. Additionally, assess the fuel system by ensuring the fuel pump and injectors are functioning correctly, as issues here can hinder fuel delivery. Don’t forget to inspect the spark plugs, as worn or damaged plugs can also lead to starting difficulties. Finally, using an OBD-II scanner to check for error codes can provide valuable insights into any underlying issues. By systematically following these diagnostic steps, you can effectively troubleshoot the starting problem and determine the necessary repairs for your Avalon.

What are the common problems that could cause a 2017 Toyota Avalon to not start?

When troubleshooting a 2017 Toyota Avalon that won't start, 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 area to investigate is the starter motor; a faulty starter can prevent the engine from turning over. Additionally, issues within the fuel system, such as a clogged fuel filter or a malfunctioning fuel pump, can hinder the engine's ability to receive the necessary fuel for ignition. It's also crucial to check the ignition switch, as a malfunction here can disrupt the electrical system's engagement. Another component to examine is the starter relay, which is responsible for supplying power to the starter motor; if this relay is broken, the car will not start. Furthermore, a failing alternator can lead to a drained battery, compounding the starting issues. Lastly, problems within the ignition system, including worn spark plugs or a defective ignition coil, can also prevent the engine from starting. By systematically checking these components, you can effectively diagnose and address the starting issues with your Avalon.

How urgent is it to address the starting issue in a 2017 Toyota Avalon?

When dealing with starting issues in a 2017 Toyota Avalon, the urgency of the situation cannot be overstated. If the symptoms indicate a potential safety risk, such as the vehicle failing to start when needed or stalling unexpectedly, it is imperative to take immediate action. These problems not only jeopardize the safety of the driver and passengers but can also lead to dangerous situations on the road. Furthermore, neglecting these starting issues can significantly impact the vehicle's overall operation, leading to inconvenient breakdowns and the risk of being stranded. By addressing the problem promptly, you can prevent further damage to the vehicle, which could result in more extensive and costly repairs down the line. Therefore, it is advisable to prioritize resolving any starting issues to ensure both safety and the longevity of your Avalon.

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