2017 Lexus GS350 Won't Start

Resolve Starting Issues for Your 2017 Lexus GS350

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Reviewed by
Aisha
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 Lexus GS350 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 when a 2017 Lexus GS350 won't start?

When your 2017 Lexus GS350 refuses to start, the first step is to check the battery, as a weak or dead battery is often the culprit behind starting issues. Ensure that the battery terminals are clean and securely connected, and consider jump-starting the vehicle if necessary. Next, verify the fuel level; sometimes, the simplest explanation is that the tank is empty. If both the battery and fuel levels are adequate, turn your attention to the ignition system. Inspect components like the spark plugs and ignition coils for wear or damage, as these can hinder the starting process. Utilizing an OBD-II scanner can also be beneficial; it allows you to read any error codes that may indicate specific problems within the vehicle's systems. If no codes are present, assess the starter motor to ensure it is operational, as a malfunctioning starter can prevent the engine from cranking. Finally, examine the fuel system, including the fuel pump and filter, to rule out any issues that could impede fuel delivery. By systematically following these diagnostic steps, you can effectively identify and address the reasons your Lexus GS350 won't start, empowering you to take the necessary actions for resolution.

What are the common problems that could cause a 2017 Lexus GS350 to not start?

When troubleshooting starting issues with a 2017 Lexus GS350, it's essential to consider several common problems that could be at play. A dead or weak 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 properly, the next component to examine is the starter motor; a faulty starter may fail to crank the engine, leading to frustration. Additionally, issues within the fuel system, such as a clogged fuel filter or a malfunctioning fuel pump, can hinder the engine's ability to start. It's also crucial to check the ignition switch, as a malfunction here can prevent the vehicle from responding when the key is turned. Worn or faulty spark plugs can further complicate matters by causing ignition problems. Lastly, if the vehicle's security system is malfunctioning, it may inadvertently block the starting process. By systematically evaluating these potential issues, you can effectively diagnose and address the starting problems with your Lexus GS350.

What urgent steps should be taken to diagnose and resolve the starting issue in a 2017 Lexus GS350?

When dealing with a starting issue in your 2017 Lexus GS350, it is crucial to act swiftly to prevent further complications that could compromise your vehicle's safety and performance. A weak or dead battery is often the first culprit, and neglecting to check it can leave you stranded. If the battery is functioning but the car still won’t start, the starter motor may be at fault, which can lead to more extensive electrical problems if not addressed. Additionally, issues within the fuel system, such as a malfunctioning fuel pump or clogged fuel filter, can hinder fuel delivery, resulting in engine failure to start. Ignoring these signs can lead to costly repairs down the line. Furthermore, problems with the ignition system, including faulty spark plugs, can exacerbate starting issues, making it essential to test these components promptly. Utilizing a diagnostic scanner to check for error codes can provide critical insights into the problem, allowing for a more targeted approach to repairs. Lastly, a failing alternator can drain your battery, compounding the starting issue and potentially leading to a complete breakdown. By taking these urgent steps, you not only enhance your chances of a quick resolution but also safeguard your vehicle from further damage, ensuring a safer driving experience.

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