My Infiniti Won’t Start: 20 Causes & Fixes!

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When your Infiniti won't start and time is of the essence, it can be annoying and nerve-wracking. While a few explanations for a car not starting can be easily identified and resolved, others require the help of a skilled mechanic. In this piece, we'll address several usual factors why your automobile refuses to start and supply advice on identifying and repairing these problems independently. Time to get your Infiniti functioning and on the streets!

Chat with an Infiniti Mechanic

Before we get into it if you'd rather skip to the end and just get the answer, feel free to engage in a one-on-one chat and ask an Infiniti mechanic regarding the reasons your Infiniti doesn't start and how to fix it. At the bottom right-hand corner of this site, there is a real-time chat function that links you with skilled mechanics reachable anytime to respond to your questions and provide guidance. So if you need quick, affordable assistance with your Infiniti, it's a fantastic selection where you're able to inquire about the mechanics with countless questions. So with that out the way, let's get stuck in!

1: Dead Battery

Dead battery

One typical cause your Infiniti won't start is a depleted battery. Indications that your battery may be dead include an engine failing to turn over or a clicking noise while turning the ignition key. To fix this problem, jump-starting your Infiniti, or replacing the depleted battery may be necessary – keep jumper leads available just in case!

2: Neglected Alternator

Car alternator causing battery to drain

Your Infiniti's alternator handles recharging your vehicle's battery while it's running. In case it fails, there may not be sufficient power to get your vehicle running. Symptoms that something may be amiss include an illuminated battery indicator on your dashboard, weaker headlights, or even a total lack of power. Resolving this issue properly demands expert assessment and repair. The cost of this to diagnose and repair hinges on the mechanic and the parts needed. If you need advice on this, you can have a chat with an expert mechanic online at any time.

3: Clogged Fuel Filter

Clogged Fuel filter

The fuel filter plays an essential role in filtering unwanted particles out of gasoline before it reaches your engine, so, when it's obstructed, it can decrease efficiency or prevent your Infiniti from starting altogether. Indications that your Infiniti's filter could be obstructed involve a lack of power, stalling, or no start at all. Fixing a blocked fuel filter yourself or with assistance from a skilled mechanic shouldn't take long. You can receive recommendations and detailed instructions on this by chatting with an expert mechanic online.

4: Malfunctioning Starter Motor

car starter motor faulty

The starter motor handles cranking the engine as you turn the key in the ignition. Should it malfunction, it's probable the cause for your vehicle doesn't start or you might notice grinding noises as you turn the key. The answer for a malfunctioning starter involves replacing it; this necessitates professional diagnosis and service. The cost of this can vary a lot depending on your specific situation. You can inquire a mechanic via the Internet for guidance on estimates for your specific situation, so you are prepared while going to the nearby mechanic's shop.

5: Neglected Ignition Switch

Faulty ignition switch

An ignition switch takes care of initiating and maintaining your vehicle's engine operating efficiently. If it malfunctions, it can hinder your automobile from starting or lead to stalling while driving. Signs that an ignition switch is malfunctioning involve no reaction when turning the key in the ignition and no engine turning over. To address this problem, a skilled technician's evaluation and repair could be all it takes. Speak to a mechanic online or in person to have this issue checked and fixed.

6: Damaged Spark Plugs

faulty spark plugs car

Spark plugs initiate the fuel in an engine's cylinders. Should they get worn or get damaged, they could fail to generate a spark and this can prevent the engine from igniting. Indications of faulty spark plugs involve a rough idle, sluggish acceleration, or trouble when you try to start your vehicle. To fix this concern, swap them out for new ones, either by an experienced professional or a do-it-yourself enthusiast. This shouldn't be an expensive or difficult repair; if you choose to tackle it independently, you can obtain guidance and be guided through the steps anytime by talking to a mechanic online.

7: Fuel Pump Failure

faulty fuel pump

The fuel pump takes care of providing fuel to the engine, and if it malfunctions, your vehicle won't start or function as it should. Indications that there might be a concern include a lack of response when turning the key in the ignition, the engine coming to a stop or misfiring. The sole solution for a defective fuel pump system involves changing it, which calls for skilled evaluation and fixing by knowledgeable mechanics.

8: Faulty Distributor Cap

faulty distributor cap

The distributor cap handles transporting electric current from the ignition coil to your spark plugs. If this part malfunctions, your engine might not achieve proper ignition. A faulty distributor cap can hinder the engine from starting correctly, resulting in engine misfiring, sluggish acceleration, and challenges starting it. The solution for a faulty distributor cap involves getting a new one; a task that can be accomplished either by an experienced mechanic or someone who prefers doing it themselves with basic skills and tools to cut costs. For live step-by-step directions on how to complete the procedure and spend less, you can consult a mechanic online and receive assistance.

9: Ignition Coil Failure

faulty ignition coil car

The ignition coil handles generating the electric current that ignites the fuel in the engine's cylinders. If it breaks down, the engine could fail to start or misfire. Indications of a faulty ignition coil involve an absence of reaction while turning on the ignition, misfiring engine noises, and sluggish acceleration. To handle this problem skilled evaluation and service are generally needed; replacing an ignition coil usually resolves all such concerns. The cost of this hinges on the technician and your individual situation. You can request a cost estimate or an alternative viewpoint on the price from an online mechanic to help with the process.

10: Broken Timing Belt

broken timing belt car

The timing belt is responsible for syncing the actions of the valves in an engine and its pistons. If it breaks, it's likely the cause of your Infiniti won't start, since the engine may not start or function as it should. Symptoms that there may be a concern include no response when engaging the ignition key, misfiring, or stalling of the engine. To address this situation, skilled evaluation and fixing are necessary; changing the belt entails both. If you're interested in a quote on your individual case, you are free to ask for guidance from a virtual mechanic, to ensure you are well-prepared when you visit a local mechanic.

11: Failed Camshaft Position Sensor

camshaft position sensor.

Your Infiniti's camshaft position sensor takes care of keeping track of the position of a camshaft and relaying that data to the car's engine control module. If this sensor malfunctions, when you try to start your Infiniti, the engine might not start or run correctly. Signs could encompass no response when using the ignition key, misfiring noises from the engine, or weak acceleration. A professional diagnosis and service for a faulty camshaft position sensor usually involve swapping it with a fresh component. The cost of this depends on your specific case, you can get a cost estimate from a local repair shop or a mechanic online.

12: Failing Crankshaft Position Sensor.

Car mechanic hands replacing a camshaft position sensor.

A crankshaft position sensor handles observing the position of your engine's crankshaft (crank) and relaying that information to its control module. If the sensor fails, your Infiniti might not start or run correctly, with issues cranking; symptoms encompass a lack of response when turning the ignition key, misfiring engine sounds, or weak acceleration. The only solution for a faulty crankshaft position sensor is a replacement – which requires a skilled mechanic to assess and fix. You may obtain suggestions regarding your unique circumstances from a local mechanic or online.

13: Faulty Mass Airflow Sensor

faulty air flow sensor

Your Infiniti's mass airflow sensor takes care of measuring the quantity of air flowing into the engine and sending that data to your Infiniti's engine control module. If it breaks down, chances are the culprit your vehicle struggles to start or run properly. Signs of a malfunctioning airflow sensor encompass weak acceleration, engine misfiring sounds, or difficulty starting it. To fix this problem, a professional mechanic is required an expert mechanic to evaluate and resolve the defective mass airflow sensor. Talk to a nearby garage or through online platforms for guidance and expense approximations specific to your case.

14: Computer System Malfunction

faulty computer system in car

Contemporary vehicles depend greatly on their onboard computer for many essential functions, like starting and running the engine and managing transmission and emissions. If this element fails, it might result in different problems like a non-responsive engine, alert lights on the instrument panel, poor acceleration, or trouble getting the engine to start. To fix an issue with the computer system, it is recommended to get it checked and fixed by a professional mechanic.

15: Blown Fuses

blown fuse in car

A damaged fuse could also be to blame for your Infiniti failing to start. Fuses safeguard numerous electrical components in your Infiniti, and when a fuse blows, that particular component like the ignition system or may no longer operate as intended. Indications of a blown fuse involve no response when turning the ignition key in the ignition switch, no functioning lights or accessories, as well as an engine misfiring intermittently. To identify a burnt-out fuse, examine the fuse box situated either in the engine compartment or below the dashboard. If you find a burnt-out fuse, replace it with one of the same amperage ratings. Though fixing a fuse is often an uncomplicated DIY repair, take note that repeatedly blowing fuses could point to a deeper electrical issue which necessitates expert diagnosis and fixing. If you want more guidance on this or help through the process in real time, feel free to speak to a mechanic online.

16: Clogged Air Filter

clogged air filter in car

The air filter is responsible for blocking dirt and other contaminants and other pollutants from entering the engine. If it's clogged, it can limit airflow to the engine, which may cause problems starting or even reduced performance. Signs of a clogged filter include reduced acceleration, trouble starting the engine, and reduced fuel efficiency. To address this problem, it's necessary to replace the filter, a task effortlessly done by an experienced mechanic or even a do-it-yourselfer who understands what they are doing.

17: Dirty Fuel Injectors

Dirty Fuel Injectors

Fuel injectors are in charge of delivering gas to the engine. If they become dirty or blocked, it might prevent enough fuel delivery to start or even run the engine properly. Signs that the fuel injectors could be clogged include an unresponsive reaction when activating the key in the ignition, poor acceleration, or even engine stalling. The remedy for clogged injectors is cleaning – which could be performed by a professional mechanic.

18: Faulty Engine Control Module (ECM)

Car mechanic team using laptop boosting car engine at auto repair shop

The engine control module (ECM) is in charge of monitoring and controlling many Infiniti systems, including engine performance as well as emission levels. When the engine control module stops working or even malfunctions, it might cause several difficulties with the starting or even the running of your engine. Symptoms that there is an issue with an ECM feature warning lights on your dashboard, slow acceleration, or even difficulty starting your engine. To solve the issue with a malfunctioning ECM, seek advice from a professional mechanic who can correctly diagnose and fix it.

19: Bad Fuel Pump Relay

bad fuel pump relay

The fuel pump relay is responsible for providing current to the pump, thus if the relay malfunctions, the fuel pump will not receive sufficient power to work which might cause engine starting issues. Symptoms that something is wrong comprise no response while turning the key into the ignition, engine stalling, or even engine misfires. To resolve a bad fuel pump relay, a professional or even knowledgeable do-it-yourselfer can swap the relay with proper instructions or even directions.

20: Failed Throttle Position Sensor

Faulty throttle position sensor

The throttle position sensor takes care of observing the throttle position and relaying such information to the engine's control module. If it malfunctions, your vehicle could not begin or operate properly. Signs of a malfunctioning throttle position sensor comprise a lack of response when turning your key into the ignition, lousy acceleration, or even stalling. Addressing a malfunctioning position sensor necessitates expert analysis and repair by way of a seasoned Infiniti mechanic.


In summary, when experiencing a car that won't turn over,  be an annoying and stressful situation. Yet, you will find several potential reasons and solutions regarding why this may happen. Through understanding the usual reasons as well as signs linked to a not starting automobile, it is possible to accurately identify the problem as well as locate an effective fix. No matter the cause for your car failing to start, whether it's a dead battery, fuel malfunction, bad starter motor, or even an ignition problem – there are steps you can take to acquire back on the road safely. Always exercise caution when focusing on the car and do not hesitate to find expert assistance if needed. Hopefully, this comprehensive manual offers enough information so you are able to quickly determine what exactly is stopping the engine from turning on again to ensure that the problem could be addressed immediately. Don't forget, if you need extra help or advice, feel free to use our online mechanic advice service!


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FAQs (Frequently Asked Questions)

What Should I Do if My Infiniti Won't Start?

In case your Infiniti doesn't start, first check the car battery, fuel system, starter motor, as well as ignition system for issues. If you can't take your Infiniti. to a nearby mechanic, you can speak to one on the Internet initially.

What are the signs of a dead Infiniti car battery?

Signs of a dead battery include problems starting the engine or even hearing a clicking sound when you turn on the ignition switch. If you are not sure, consult an online or local mechanic.

What are the signs of a blocked Infiniti car fuel filter?

Symptoms of a clogged filter include reduced power, stalling, or even difficulty starting the Infiniti. If you're uncertain, speak to a local or online mechanic.

When should I replace my Infiniti car battery?

The lifespan of a car battery varies, but generally speaking, it's recommended to change car batteries every three to five years to prevent problems when starting up the Infiniti.

Can a malfunctioning mass airflow sensor cause my Infiniti to not start?

A faulty mass airflow sensor may have an effect on performance, it is not likely to cause problems with starting up your vehicle.

How do I jump start my Infiniti?

In order to jump start your vehicle, you'll need jumper cables and another vehicle with a working battery. Attach the jumper cables properly following the correct order, turn on the functioning vehicle, wait for a short while, then restart your car. Talk to an online mechanic, they can give advice as well as guide you through this process.

Can a bad alternator cause my Infiniti to not start?

Unfortunately, yes. If the alternator is faulty, the battery might not have enough charge to start the engine. Consult with an online or local mechanic for guidance regarding this matter.

How do I know if my spark plugs in my Infiniti need replacing?

Indications of bad spark plugs include a rough engine idle, poor acceleration, or difficulty starting the engine.

What actions should I take if my Infiniti stalls while driving?

If your vehicle stalls while you are driving, first try to carefully pull over to the side of the road, turn off its engine then attempt to restart it. If this fails, seek professional assistance for help.

Will a damaged timing belt harm my Infiniti car's engine?

Yes, this type of damage might be expensive to repair if the timing belt breaks. If you're uncertain, speak to an online or local mechanic.

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