2018 Acura RLX Won't Start

Common Causes for Your 2018 Acura RLX 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 2018 Acura RLX 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 2018 Acura RLX won't start?

When faced with a situation where your 2018 Acura RLX won't start, it's essential to adopt a systematic diagnostic approach to identify the root cause effectively. Begin by checking the battery, as a dead or low battery is a common culprit; using a multimeter can help you determine its voltage, and if necessary, a jump-start might get you back on the road. Next, inspect the ignition switch to ensure it is functioning properly, as a malfunction here can prevent the vehicle from starting altogether. Don't overlook the fuel levels; sometimes, the simplest solution is just refueling the car. If these initial checks don't resolve the issue, examine the starter motor to confirm it is engaging correctly, as a faulty starter can hinder the engine from turning over. Additionally, utilizing an OBD-II scanner to scan for error codes can provide valuable insights into any underlying problems. Lastly, inspect the fuses related to the starting system, as a blown fuse can disrupt the entire starting process. By following this structured approach, you can efficiently narrow down the potential causes and take the necessary steps to get your Acura RLX running again.

What are the common problems that could cause a 2018 Acura RLX to not start?

When your 2018 Acura RLX refuses to start, it can be frustrating, but understanding the common problems can help you diagnose the issue. One of the first things to check is the battery; a dead or weak battery is often the culprit, especially if the vehicle has been sitting idle or if extreme weather conditions have affected its performance. If the battery is in good condition, the next step is to inspect the starter motor, as a faulty starter can fail to crank the engine. Additionally, consider the fuel system; a clogged fuel filter or malfunctioning fuel pump can disrupt fuel delivery, preventing the engine from starting. Don't overlook the ignition switch, as a malfunction here can also hinder the starting process. Worn-out spark plugs may lead to ignition issues, making it difficult for the engine to fire up. Furthermore, if the car's security system is malfunctioning, it may inadvertently prevent the engine from starting. Lastly, a failing alternator can drain the battery, compounding the starting issues. By systematically checking these components, you can effectively troubleshoot and resolve the starting problems with your Acura RLX.

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

Addressing a starting issue in a 2018 Acura RLX that won't start is of utmost urgency due to the potential risks and complications that can arise from neglecting the problem. When a vehicle fails to start, it can lead to further damage to critical components, such as the battery or starter motor, which may escalate repair costs significantly. Additionally, a car that stalls unexpectedly poses serious safety hazards, not only to the driver but also to other road users. Ignoring these symptoms can result in dangerous situations, especially if the vehicle fails to start in a precarious location. Moreover, the inconvenience of a non-starting vehicle can disrupt daily life, affecting work, appointments, and personal commitments. Therefore, it is crucial to diagnose and resolve starting issues promptly, ensuring both safety and the longevity of your vehicle. Seeking professional assistance can help identify the root cause and prevent further complications, making it essential to act quickly when faced with this issue.

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2018 Acura RLX Won't Start? Common Causes & Repairs