My John Deere Tractor Won’t Start: 20 Causes & Fixes!

John Deere Tractor Mechanic

Table of Contents


If your John Deere Tractor refuses to start and you need to get somewhere quickly, it might be exasperating and nerve-wracking. While some causes for a tractor not starting can be easily identified and resolved, other issues necessitate professional mechanic intervention. In this piece, we'll address a few typical causes why your tractor won't start and offer guidance on finding and fixing them yourself. Let's get your John Deere Tractor functioning and on the streets!

Chat with a John Deere Tractor Mechanic

Prior to diving in, if you'd rather skip to the end and simply find the resolution, feel free to chat directly and ask a John Deere Tractor mechanic about why your John Deere Tractor won't start and methods to resolve it. In the lower right corner of this site, you'll find a live chat option that links you with expert mechanics accessible round-the-clock to address queries and provide guidance. So if you need fast, cheap help with your John Deere Tractor, it's a fantastic selection in which you can inquire about the mechanics with countless questions. So with that out of the way, let's dive in!

1: Dead Battery

Dead battery

A common reason your John Deere Tractor won't start is a depleted battery. Signs that your battery may be dead include no engine turnover and a clicking sound when turning the key in the ignition. To resolve this issue, jump-starting your John Deere Tractor, or changing the drained battery might be required – maintain jumper cables handy in case you need them!

2: Neglected Alternator

Car alternator causing battery to drain

Your John Deere Tractor's alternator is responsible for recharging your John Deere Tractor's battery when it's in operation. If it malfunctions, there might not be adequate energy to get your John Deere Tractor started. Symptoms that something may be amiss involve an illuminated battery indicator on the John Deere Tractor's dashboard, dimmed headlights, or perhaps a total lack of power. Addressing this situation adequately requires a skilled technician's evaluation and repair. The cost of this for diagnosis and repair relies on the expert and necessary components. If you need advice about this, you are welcome to chat with one of our online mechanics anytime.

3: Clogged Fuel Filter

Clogged Fuel filter

The fuel filter serves a vital purpose in clearing out contaminants from the fuel prior to reaching the engine, so when it becomes clogged, it might decrease efficiency or prevent your John Deere Tractor from starting altogether. Indications that your filter may be blocked consist of lack of power, stalling out, or no start at all. Fixing an obstructed fuel filter yourself or with assistance from an experienced mechanic should take only moments. You can get recommendations and detailed instructions on this through a chat with a skilled mechanic via the Internet.

4: Malfunctioning Starter Motor

car starter motor faulty

A starter motor is responsible for starting an engine when you turn the key in the ignition. If it malfunctions, chances are the cause for your automobile refusing to start or you could experience abrasive noises as you turn the key. The answer for a malfunctioning starter involves replacing it; this requires professional diagnosis and repair. The expense for this might differ significantly depending on your specific situation. You can inquire a mechanic via the internet for recommendations on cost estimates for your specific situation, so you're ready as you head into the local mechanic's garage.

5: Neglected Ignition Switch

Faulty ignition switch

The ignition switch handles initiating and maintaining your automobile's engine running smoothly. In case it fails, it can stop your vehicle from starting or make it stall during driving. Symptoms that an ignition switch has failed involve no action while turning the key in the ignition switch and a failure to crank the engine. To resolve this situation, professional mechanic diagnosis and fixing may be all that's necessary. Talk to a mechanic online or in person to have this issue checked and resolved.

6: Damaged Spark Plugs

faulty spark plugs car

Spark plugs ignite gasoline inside the cylinders of an engine. Should they get worn or damaged, they could fail to create a spark and this can stop the engine from starting. Indications of faulty spark plugs include an uneven idle, sluggish acceleration, or challenges when you try to start your tractor. To resolve this concern, swap them out for new ones – either by a proficient mechanic or do-it-yourself enthusiast. This shouldn't be an expensive or difficult repair; if you want to do it yourself, you can receive recommendations and be directed through the procedure at any time by consulting with a mechanic via the Internet.

7: Fuel Pump Failure

faulty fuel pump

The fuel pump is responsible for supplying fuel to the engine, and when it fails, your tractor won't start or run correctly. Symptoms that there might be a concern include a lack of response as you turn the key in the ignition, the engine coming to a stop or erratic firing. The only solution for a defective fuel pump is to replace it – this requires expert assessment and repair by experienced mechanics.

8: Faulty Distributor Cap

faulty distributor cap

A distributor cap takes care of transferring electric current from the ignition coil to the spark plugs. If this piece breaks down, your engine could fail to achieve proper ignition. A malfunctioning distributor cap can prevent your engine from starting correctly, causing engine misfiring, poor acceleration, and challenges starting it. The solution for a bad distributor cap is replacing it – something that can be done either by a skilled mechanic or DIYer with fundamental know-how and tools to cut costs. For live stepwise instructions on completing this process and spending less, you can talk to a mechanic online and receive assistance.

ion Coil Failure

faulty ignition coil car

The ignition coil is responsible for creating the electrical current that ignites the fuel in the cylinders of the engine. If it breaks down, the engine might not start or experience misfiring. Signs of a defective ignition coil comprise an absence of reaction as you turn on the ignition, misfiring engine noises, and sluggish acceleration. To handle this situation professional diagnosis and service are usually necessary; replacing an ignition coil usually resolves all these issues. The price for this depends on the mechanic and your individual situation. You are free to obtain a quote or a second opinion on cost from a mechanic online to aid in the course of action.

10: Broken Timing Belt

broken timing belt car

Your John Deere Tractor's timing belt takes care of syncing the actions of the engine's valves and its pistons. If it fails, it's likely the cause of your John Deere Tractor not starting, since the engine could fail to start or operate properly. Symptoms that there may be an issue involve a lack of response when engaging the key, engine misfiring, or the stalling of your engine. To resolve this problem, skilled evaluation and fixing are necessary; replacing the timing belt involves both. If you would like a quote for your specific situation, feel free to get advice from a mechanic online, so you are more prepared while visiting a nearby garage.

11: Failed Camshaft Position Sensor

camshaft position sensor.

Your John Deere Tractor's camshaft position sensor handles keeping track of a camshaft's position and relaying that data to the Tractor's engine control module. If the sensor fails, when you attempt to start your John Deere Tractor, the engine might not start or operate properly. Indications could encompass no response when turning the key in the ignition, engine misfiring noises, or inadequate acceleration. A professional diagnosis and repair for a broken camshaft position sensor usually involve swapping it with a replacement. This cost relies on your situation, you may obtain a quote from a nearby garage or an online mechanic.

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 transmitting that information to its control module. If it malfunctions, your tractor may not crank or start, and may not run properly; signs encompass no response when turning the ignition key, engine misfiring noises, or inadequate acceleration. The sole solution for a malfunctioning crankshaft position sensor is a replacement, which demands a skilled mechanic to diagnose and repair it. You can get advice on your individual situation from a local repair shop or through online platforms.

13: Faulty Mass Airflow Sensor

faulty air flow sensor

A mass airflow sensor takes care of measuring the amount of air going into the engine and sending that data to the John Deere Tractor's engine control module. If it breaks down, it's probable the reason why your John Deere Tractor won't start or run correctly. Symptoms of a defective mass airflow sensor encompass poor acceleration, misfiring engine noises, or trouble starting the John Deere Tractor. To fix this situation, it's necessary to have a professional mechanic evaluate and resolve the malfunctioning mass airflow sensor. Talk to a nearby garage or through online platforms to receive suggestions and expense approximations specific to your case.

14: Computer System Malfunction

faulty computer system in car

Today's Tractors rely heavily on their engine control unit for many essential functions, such as running and starting the engine and managing transmission and emissions. If this component fails, it might result in multiple complications like a non-responsive engine, alert lights on your dashboard, poor acceleration, or challenges in starting the engine. To resolve a problem with the engine control unit, it's best to get it checked and fixed by a skilled tractor mechanic.

15: Blown Fuses

blown fuse in car

A burnt-out fuse may also be to blame in terms of your John Deere Tractor not starting. Automotive fuses protect numerous electrical parts in your tractor, and when a fuse fails, that component such as the ignition system and might not function correctly. Indications that a fuse has blown are no reaction when turning the ignition key in the ignition, no functioning lights or accessories, and a sporadically misfiring engine. To check for a burnt-out fuse, examine the fuse box located either in the engine compartment or below the dashboard. If you find a blown fuse, swap it with one with an identical rating. Though replacing a fuse is usually an easy DIY project, take note that repeatedly blowing fuses could point to a deeper electrical issue that needs skilled evaluation and repair. If you need more guidance regarding this or help through the process in real-time, don't hesitate to speak to a mechanic online.

16: Clogged Air Filter

clogged air filter in car

The air filter is responsible for preventing dirt and other contaminants as well as other pollutants from penetrating your engine. When clogged, it could limit airflow to the motor, which could lead to starting issues or even poor performance. Indications that the filter is clogged are decreased acceleration, problems starting the engine, and decreased gas mileage. To address this issue, it is needed to swap out the air filter – something effortlessly done by either a professional mechanic or someone who enjoys DIY that knows what they are doing.

17: Dirty Fuel Injectors

Dirty Fuel Injectors

Fuel injectors are in charge of delivering fuel to an engine. When they get dirty or even clogged, it might prevent enough delivery of fuel to begin or even run your engine correctly. Signs that your fuel injectors could be unclean include a lack of response when activating the ignition key, poor acceleration, or even engine stalling. The answer for clogged injectors involves cleaning, which may be completed by a skilled 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 responsible for managing and regulating many John Deere Tractor systems, including the performance of the engine as well as emission levels. If the ECM fails or experiences problems, it could cause various issues involving starting or even running of the engine. Signs that there is an issue with an ECM include alert lights on the dashboard, slow acceleration or trouble starting the engine. To resolve the matter with a faulty ECM, seek advice from a professional mechanic that is able to correctly diagnose as well as repair it.

19: Bad Fuel Pump Relay

bad fuel pump relay

The fuel pump relay is in charge of sending electricity to the pump, so if the relay fails, the pump won't obtain adequate electricity to work which can result in problems starting the engine. Signs that there's something wrong include no response when you turn your key in the ignition, stalling of the engine, or engine misfires. To repair a malfunctioning pump relay, a professional or even experienced DIYer can replace the relay by following proper instructions or directions.

20: Failed Throttle Position Sensor

Faulty throttle position sensor

The throttle position sensor handles keeping track of the position of the throttle and relaying that specific data to the control module. If it fails, your tractor may not necessarily start or even run effortlessly. Symptoms of a broken sensor consist of an unresponsive state while turning your key into the ignition, weak acceleration, or even engine stalling. Fixing a malfunctioning throttle position sensor necessitates skilled analysis and repair by way of a skilled tractor mechanic.


In conclusion, finding out your vehicle refuses to start may be a frustrating and stressful experience. But, there are several potential reasons as well as solutions regarding why this particular may take place. By grasping the common causes as well as symptoms connected to a non-starting tractor, you can precisely diagnose the problem and find a highly effective fix. No matter the reason for your tractor not starting, whether it be a dead battery, fuel system issue, a bad starter, or ignition problem – there are steps you can take to acquire back on track safely. At all times exercise care when tackling your tractor issues and do not hesitate to seek professional help online if necessary. Hopefully, this particular guide has given ample information so you are able to rapidly diagnose what's stopping its motor from starting once more to ensure that it can be addressed promptly. Don't forget, if you need extra help or advice, feel free to use our mechanic chat service!

when to ask a mechanic


FAQs (Frequently Asked Questions)

What Should I Do if My John Deere Tractor Won't Start?

In case your John Deere Tractor doesn't start, first check the tractor battery, fuel, starter, as well as ignition for problems. If you are unable to get your John Deere Tractor to a local mechanic, you may consult with one on the internet first.

What are the signs of a dead John Deere Tractor battery?

Symptoms of a dead battery include trouble starting the tractor or hearing clicking as you turn on the ignition. If you're uncertain, speak to an online or local mechanic.

How do I know if my John Deere Tractor fuel filter is clogged?

Symptoms of a clogged filter consist of reduced power, stalling, or difficulty starting the John Deere Tractor. If you are not sure, consult a local or online mechanic.

How often does a John Deere Tractor battery need replacing?

Tractor batteries have different lifespans, but in general, it is suggested to change them every three to five years to prevent issues with starting the John Deere Tractor.

Can a bad mass airflow sensor keep my John Deere Tractor from starting?

While an unhealthy mass airflow sensor might impact performance, it's unlikely to cause problems with starting up your John Deere Tractor.

What is the process to jump start a John Deere Tractor?

To jump start your tractor, you require jumper leads and another vehicle with a functioning battery. Attach the jumper cables properly following the correct order, start the functioning vehicle, pause for a few minutes, then restart your tractor. Consult with an online mechanic to guide you through the process.

Can a bad alternator cause my John Deere Tractor to not start?

Regrettably, it can. If the alternator is faulty, your tractor battery may not have enough charge to start the engine. Talk to a local or online mechanic for advice on this.

What are the signs of bad spark plugs in John Deere Tractor?

Symptoms of worn spark plugs consist of rough idle, reduced acceleration, or difficulty starting the engine.

What actions should I take if my John Deere Tractor stalls while driving?

In the event your John Deere Tractor stalls while driving, initially try to carefully pull over to a safe spot on the roadside, switch off the engine then try restarting it. If this doesn't work, seek professional assistance to assist you.

Can a broken timing belt damage my John Deere Tractor's engine?

Indeed, such damage can be quite costly to fix if the timing belt breaks. If you're uncertain, consult a local or online mechanic.

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