2023 Lexus RX350 Engine Is Stalling

Common Causes of Engine Stalling in Your 2023 Lexus RX350 and How to Resolve Them

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Fuel System
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15% chance it's the
Air Intake System
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55% chance it's
Something else
The most common reasons a 2023 Lexus RX350 engine is stalling are the fuel system, the air intake system, or the ignition system.
  • Fuel System: A clogged fuel filter or failing fuel pump can restrict fuel flow, resulting in poor engine performance and starting issues.
  • Air Intake System: A dirty or damaged air filter or a malfunctioning mass airflow sensor can restrict airflow, leading to reduced engine performance and efficiency.
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.

How much does it cost to fix a 2023 Lexus RX350 engine is stalling?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

If the MAF sensor sends an erroneous signal, a few things happen. The engine's computer will trigger the check engine light, and the on-board diagnostic (OBD) trouble codes will reflect the airflow discrepancy noted by the MAF sensor. Depending on the reported volume of air, the engine may try to compensate for these conditions, causing the engine to burn excessive amounts of fuel and emit black smoke from the exhaust. In this case, the OBD trouble codes would also reference faults recognized by the exhaust oxygen sensors. The engine may also have issues with idling roughly, failing to start, stalling, hesitation, power loss, misfires, and fuel consumption.

»MORE: Signs of a failing mass airflow sensor

A faulty oxygen sensor is one of the most common causes of a check engine light. Symptoms may include a decrease in fuel mileage, hesitation or misfiring from the engine, rough idling or even stalling. A faulty sensor may cause the vehicle to fail an emissions test.

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

The most likely symptom of a faulty fuel temperature sensor is a check engine light. When the sensor goes bad, the Engine Control Module signals the driver that there is a problem by turning on the dash light. Poor fuel economy might also be noticed. In some cases, a failing fuel temperature sensor could lead to hard starting of the engine or an engine misfire and poor performance.

When the Check Engine Light comes on, you may experience engine performance issues such as poor acceleration, rough idling, or an engine that won't start. In some cases, no abnormal symptoms will be experienced. Other systems like the transmission or ABS can cause the Check Engine Light to illuminate and lights for those systems can come on at the same time. Similar lights may say "Check Engine Soon", "Malfunction Indicator Light" or just "Check". In rare case the engine can overheat.

What are the initial diagnostic steps to take for a 2023 Lexus RX350 experiencing engine stalling?

When faced with engine stalling in a 2023 Lexus RX350, it's essential to adopt a methodical diagnostic approach to effectively identify the root cause. Start by checking for error codes using an OBD-II scanner, as these codes can reveal critical information about potential malfunctions. Next, inspect the fuel system, focusing on the fuel pump, filter, and injectors to ensure they are delivering adequate fuel to the engine. Following this, examine the ignition system components, including spark plugs and ignition coils, to confirm they are functioning correctly and providing the necessary spark. Additionally, evaluate the air intake system for any blockages or leaks that could disrupt the air-fuel mixture. Don't overlook the importance of inspecting various sensors, such as the mass airflow and throttle position sensors, as they are vital for optimal engine performance. Lastly, check the battery and charging system to rule out any electrical issues that might contribute to stalling. By systematically addressing these areas, you can effectively diagnose and resolve engine stalling issues in your Lexus RX350.

What are the common problems that could cause the engine to stall in a 2023 Lexus RX350?

When diagnosing engine stalling issues in a 2023 Lexus RX350, it's essential to consider several common problems that could be at play. One of the primary culprits is the fuel system, where a clogged fuel filter or a malfunctioning fuel pump can impede the flow of fuel, leading to stalling. Additionally, the ignition system plays a crucial role; faulty spark plugs or ignition coils can disrupt the ignition process, causing the engine to stall unexpectedly. Airflow obstructions, such as a dirty air filter or a malfunctioning mass airflow sensor, can also affect the air-to-fuel ratio, resulting in performance issues. Furthermore, sensor malfunctions, particularly with components like the crankshaft or camshaft position sensors, can send incorrect signals to the engine control unit, contributing to stalling. Electrical problems, including a weak battery or faulty alternator, may lead to intermittent power loss, while vacuum leaks can create imbalances in engine performance. By understanding these potential issues, DIY enthusiasts can effectively troubleshoot and address the root causes of engine stalling in their Lexus RX350, ensuring a smoother and more reliable driving experience.

How urgent is it to address the engine stalling issue in a 2023 Lexus RX350?

When it comes to a 2023 Lexus RX350 experiencing engine stalling, the urgency to address this issue cannot be overstated. Engine stalling can occur without warning, posing a significant safety risk as it may lead to a sudden loss of control while driving, increasing the likelihood of accidents. Moreover, neglecting this problem can exacerbate the situation, potentially causing more severe damage to the engine or related components, which could result in expensive repairs down the line. For DIY enthusiasts, understanding the critical nature of this issue is essential; timely intervention not only ensures the vehicle's performance and reliability but also safeguards your investment. Regular maintenance and prompt repairs are key to prolonging the life of your vehicle, making it imperative to diagnose and resolve any stalling symptoms as soon as they arise. If you're not confident in your ability to troubleshoot the issue, consulting a qualified mechanic or dealership is highly recommended to ensure your safety and the longevity of your Lexus RX350.

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