2018 Lexus LX570 Won't Start

Resolve Starting Issues for Your 2018 Lexus LX570

Find Repair Location
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 2018 Lexus LX570 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 2018 Lexus LX570 that won't start?

When your 2018 Lexus LX570 refuses to start, the first step is to check the battery, as a dead or weak battery is often the culprit behind starting issues. Ensure the battery terminals are clean and securely connected, and consider jump-starting the vehicle if necessary. Next, verify that there is sufficient fuel in the tank, as running low can prevent the engine from starting. Pay attention to any warning lights on the dashboard, as these indicators can provide insights into specific problems within the vehicle's systems. If the battery and fuel levels are adequate, proceed to test the starter motor, as a malfunctioning starter can hinder the engine from turning over. Additionally, inspect the ignition system components, including spark plugs and ignition coils, to confirm they are functioning properly, as faulty parts here can also lead to starting difficulties. Finally, using a diagnostic scanner to check for error codes can help identify any underlying issues that may not be immediately apparent. By systematically following these steps, you can effectively diagnose and address the starting problem with your Lexus LX570.

What are the common problems that could cause a 2018 Lexus LX570 to not start?

When a 2018 Lexus LX570 fails to start, several common problems may be at play, each linked to essential vehicle systems. A dead battery is often the first suspect, as it can result from age, extreme weather, or simply leaving the lights on. If the battery is functioning but the engine still won’t crank, the starter motor could be faulty, preventing 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. Another potential culprit is the ignition switch; if it malfunctions, it may not engage the electrical system properly, leading to starting difficulties. Worn or faulty spark plugs can also contribute to ignition problems, making it hard for the engine to start. Lastly, if the vehicle's security system is malfunctioning, it may inadvertently prevent the car from starting as a safety precaution. Understanding these common issues can empower DIY enthusiasts to troubleshoot effectively and determine whether a simple fix is possible or if professional assistance is needed.

How urgent is it to address the starting issue in a 2018 Lexus LX570 that won't start?

When faced with a starting issue in a 2018 Lexus LX570, it is crucial to act swiftly to mitigate potential risks and damages. Neglecting this problem can lead to further complications, such as damage to the battery, starter, or ignition system, which may result in more expensive repairs down the line. Additionally, a vehicle that fails to start can create safety hazards, particularly if the issue arises unexpectedly while on the road, putting both the driver and passengers at risk. Moreover, the inconvenience of a non-starting vehicle can disrupt daily activities, leading to unnecessary delays and frustration. Therefore, addressing the starting issue promptly not only protects the vehicle's integrity but also ensures the safety and convenience of everyone involved.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.

2018 Lexus LX570 Won't Start? Common Causes & Repairs