2014 Lexus IS F Won't Start

Common Causes for Your 2014 Lexus IS F Not Starting and How to Resolve Them

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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 2014 Lexus IS F 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 diagnostic steps should I take to troubleshoot the starting issue in my 2014 Lexus IS F?

When troubleshooting the starting issue in your 2014 Lexus IS F, it's essential to adopt a systematic diagnostic approach that begins with the simplest checks before progressing to more complex assessments. Start by examining the battery, as a weak or dead battery is often the most common culprit behind starting problems. If the battery is functioning well, move on to inspect the starter motor; listen for any clicking sounds when you turn the key, which may indicate a malfunction. Next, evaluate the ignition switch to ensure it is properly engaging the starter. If these components are in good condition, check the fuel delivery system, including the fuel pump, to confirm it is supplying fuel to the engine. Additionally, inspect the spark plugs for wear or damage, as faulty plugs can hinder the starting process. Finally, utilize an OBD-II scanner to identify any error codes that may provide insights into the issue, and examine the fuel system for leaks or clogs. By following this structured approach, you can effectively diagnose and address the starting issue in your Lexus IS F.

What are the common problems that could cause a 2014 Lexus IS F to not start?

When your 2014 Lexus IS F won't start, it’s essential to understand the common problems that could be at play to effectively troubleshoot the issue. Start by examining the battery, as a dead or weak battery is often the primary reason for starting failures, particularly if the vehicle has been unused for a while or subjected to extreme temperatures. If the battery checks out, the next component to investigate is the starter motor; a malfunctioning starter can prevent the engine from cranking properly. Fuel delivery is another critical area to assess; issues such as a clogged fuel filter or a faulty fuel pump can obstruct the flow of fuel necessary for ignition. Additionally, the ignition switch should be inspected, as a failure here can disrupt the electrical system's ability to engage. Worn or defective spark plugs can also lead to ignition problems, making it challenging for the engine to start. Lastly, consider the overall ignition system, including components like the ignition coil or distributor, as these can also contribute to starting difficulties. By methodically checking these common issues, you can pinpoint the cause of your Lexus IS F's starting problems and take the necessary steps to resolve them.

What urgent steps should I take to diagnose and fix the starting issue in my 2014 Lexus IS F?

When faced with a starting issue in your 2014 Lexus IS F, it is crucial to act swiftly to prevent further complications that could compromise your vehicle's safety and performance. Begin by checking the battery, as a weak or dead battery is often the primary culprit behind starting failures. Ensure that the battery terminals are clean and securely connected, as neglecting this simple step can lead to more significant electrical problems. If the battery is in good condition, turn your attention to the starter motor; listen for any clicking sounds when attempting to start the engine, which may indicate a malfunction. Additionally, verify that there is sufficient fuel in the tank and that the fuel pump is operational, as a lack of fuel can easily prevent your car from starting. Don't overlook the ignition system; worn spark plugs or damaged ignition coils can also hinder the starting process. Lastly, using an OBD-II scanner to check for error codes can provide valuable insights into underlying issues. Addressing these concerns promptly not only enhances your vehicle's reliability but also safeguards against potential damage and costly repairs down the line.

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2014 Lexus IS F Won't Start? Causes & Solutions | RepairPal