Subaru Trezia Wont Start? Here’s Quick Solutions to Most Common Problems

Introduction

As a qualified mechanic with over 20 years of experience, I’ve helped plenty of people battling when their Subaru Trezia Won’t Start. And let’s face it, not being able to start your car when you need to drive straight up sucks.

But don’t worry, you’ve come to the right place, no need to keep googling searches like “reason Subaru wont start“, I got you covered. My name’s Robby, a certified auto mechanic with over two decades of experience, and in this guide, I’ll walk you through the most common reasons for why your Trezia can’t start. I’ll discuss all the routine suspects so you can diagnose what’s causing issues, plus what to do to resolve each specific problem. Drawing on my 20 years of firsthand experience, I’ll supply actionable diagnostic pointers to get your Subaru Trezia starting again as soon as possible!

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Why Won’t My a Subaru Start?

Subaru Trezia wont start

Before we dive into the laundry list of possible issues and solutions, it’s critical to first get on the same page of the central issue. When you hop in your Subaru Trezia and discover “it won’t start!”, there could be several components causing the difficulties. Maybe the engine isn’t cranking at all, or maybe it’s turning over partially yet not igniting. Or you might notice clicking sounds when you try to start it, but ultimately nothing happens. Each scenario can signal different mechanical issues.

Common Reasons Why Your Subaru Trezia Won’t Start

There are many contributing factors why your Trezia won’t start. The usual suspects include a weak or drained battery, broken alternator, starter motor failures, fuel system snags, plus electrical or wiring issues. Every one of these issues can show up differently, requiring specific methods of troubleshooting and fixing to get you back on the open road as quick as possible. All of which, we’ll delve into.

Symptoms of a Subaru Trezia That Won’t Start

Identifying these symptoms will guide you toward the core mechanical problem. Take for example, when you turn the key or press the start button and you hear it turning over yet no start up, it often means a problem with either fuel delivery or ignition issues.

Analysis of The Reasons Why Your Subaru Trezia Won’t Start

The initial move in remedying the no-start hassle is understanding the exact cause of the trouble. So let’s explore the most frequent explanations for the Trezia failing to start when you turn the key.

Battery Issues in a Subaru Trezia

car wont start but battery is good
Image Credit: MechanicAnswer.com

In the vast majority of situations, the most frequent reason a Subaru Trezia won’t start comes down to issues with the battery. Specifically, a drained or weak battery prevents the engine from cranking. The car’s battery delivers the required power to start the engine and energize all your vehicle’s electrical components. Signs of a dying battery include sluggish or strained cranking, faint headlights, or a battery alert symbol aglow on the dash. A battery charger can recharge a drained battery if you don’t have the help of another vehicle to jump start it, but do have an electrical socket nearby like at home.  And a portable jump starter lets you charge p the battery without another vehicle, and by the roadside without the need for an electrical socket, so you are never stuck.

Alternator Problems in a Subaru Trezia

car wont start alternator

The Alternator keeps the battery charged by using engine power while driving. A busted alternator can easily stop your Subaru Trezia from starting since it cannot recharge the battery, draining it fully so that one day you hop in your beloved Subaru Trezia and it refuses to start up. Symptoms of a faulty alternator can be an illuminated battery or alternator caution light on the dashboard, dull headlights while idling, or a whirring noise from the engine while running.

Starter Motor Failures in a Subaru Trezia

car wont start wont turn over

The starter motor is key to cranking the engine when you attempt to start your Subaru. In the event of starter problems, the engine might not crank, keeping your Trezia from starting. Be on the alert for clicking noises when you turn the key or grinding while trying to start, possibly meaning starter troubles.

Fuel System Issues in a Subaru Trezia

car wont start fuel filter

This isn’t about running out of gas like a silly goose. Instead, it’s problems in the fuel system itself that could leave your Trezia unable to start up. Your Subaru Trezia uses fuel to mix with air and powers the engine. Issues in fuel delivery like a clogged fuel filter or failing fuel pump relay can result in the engine lacking the fuel it needs to start. Fuel injectors can also get clogged over time, so try a fuel injector cleaner like Red Line to clear any blockages and improve starting.

Electrical System or Wiring Problems in a Subaru Trezia

car wont start electrical issue
Image Credit: MechanicAnswer.com

Ok, well yes that image is a joke, but I want to emphasize today’s cars depend greatly on electronics, expanding the number of things that can go wrong. With older Subaru’s, the usual suspects include blown fuses, spark issues, damaged ignition switches, or non-working sensors. Faulty wiring and electronics like these can all prevent your vehicle from starting. Be on the lookout for your car only starting sometimes, dashboard alerts, or failure to crank as indicators pointing to an underlying electrical issue. Diagnosing and repairing these often needs an experienced mechanic near you.

Solutions: Let’s Get Your Subaru Trezia Starting Again!

If you think you might know what the issue may be, it’s time to figure out the cause of your car’s failure to start, and then the next step is to try to repair the issue. Here are some tips for common issues we’ve talked about already:

How to Identify and Fix Battery Issues in a Subaru Trezia

car not starting but battery is fine

If you suspect a battery issue is to blame for your Subaru’s difficulty cranking, first inspect the battery terminals Verify they are clean, tight, and correctly connected. If the terminals are in fact dirty, try scrubbing them with a sodium bicarbonate(baking soda) and water solution.

Once you have checked the battery terminals, you can check to see if the battery is just out of charge, or worse, it’s old and weak, or dead and needs to be replaced. For this, you can charge the battery in a few different ways:

If the battery charges fully and performs as expected, the issue may be resolved. However, replacing the battery will be required if it is old, weak or dead. Otherwise, even sufficiently charging it to start your Trezia may only provide temporary relief before it likely runs out of power again soon. Using a multimeter or OB2 scanner to evaluate the battery’s condition can determine if it’s worth preserving or requires replacement. Suitable replacement batteries for your specific Subaru can be found on Amazon here by entering your vehicle details to filter for the right fit and choosing a highly-rated seller.

Robby Recommends:

Portable Car Battery Jump Starter Charger - NOCO Boost Plus GB40

At Home Battery Charger - YONHAN - Fully Automatic

Jumper Cables by Energizer for Car Battery - Heavy Duty

NOCO Boost Plus GB40 1000A UltraSafe Car Battery Jump Starter

YONHAN Battery Charger Fully-Automatic

Energizer Jumper Cables for Car Battery, Heavy Duty

If charging your Trezia’s battery fails to solve ongoing issues like frequent draining and recharging even after installing a new battery, an underlying problem likely causes the excessive drain. Professional diagnostic services would then be needed to inspect and identify the root cause. You can also consult a mechanic online through us or obtain an instant quote from a mobile mechanic.

How to Identify and Fix Alternator Problems in a Subaru Trezia

Car wont start replace alternator needed

If you think the alternator is the reason your vehicle won’t start, a test can confirm. If you can temporarily get the auto running (you may need a jump start), with the engine on, disconnect the positive battery terminal. It’s probably the alternator if the motor dies soon after disconnecting the positive lead. Keep in mind though this test can be dicey and mess up delicate electronics in your motor, so consulting a trained mechanic in your area or online is best before trying it.

If you figure out that the alternator is the problem, it’s a case of having it replaced. I recommend consulting an online or local mechanic as they will advise you on how difficult the repair is for your specific model, and you can work out if you want to try it yourself, or with the advice of an online mechanic

If you do want to try it yourself or take it to a local garage, you can often buy the replacement parts yourself cheaper than at the garage, but you need to know what to get for your model of Subaru Trezia. You find all the information you need about your specific vehicle by searching online for something like “Subaru vin“, which is a purchasable report, that will give the specs for your vehicle and which parts are compatible, and then you can go get the alternator parts you need. However, an easier option is, Amazon probably has the alternator you need online, at a cheaper price, and their site easily shows which ones will go in your specific car model. Check the Amazon alternator page here

How to Identify and Fix Starter Motor Problems in a Subaru Trezia

starter motor issues in a ford

If you question if the starter motor is the root cause for your Trezia refusing to ignite, listen carefully for a clicking noise when you turn the ignition key. If present, but the engine does not turn over, the starter motor likely requires replacing. You can take it to a local garage and have them repair it, or repair it yourself with the help and advice from an online mechanic guiding you. 

If you need it, one of the cheapest and easiest places to get a new starter motor, for your exact vehicle model is on the Amazon here.

How to Identify and Solve Fuel System Problems in a Subaru Trezia

clogged fuel filter car wont start

If you suspect a fuel system issue might be to blame for the no-start, listen closely for the fuel pump noise when you flip the key to “on” before attempting to start the car. The pump should make a quiet humming for a few seconds. If such a noise is not heard, the fuel pump could be faulty. Difficult starting, stalling, or lagging acceleration may also stem from a problematic or clogged fuel filter. Both pump and filter issues usually require a skilled mechanic to diagnose and fix them properly, often involving fuel pressure testing and specialized diagnostic gear. Later in this article, I detail the best ways to get help from a local Subaru mechanic near you. 

How to Fix Electrical or Wiring Problems in a Subaru Trezia

fuses to check when car wont start

If you think it’s an electrical circuitry issue, first check the fuses for the ignition system, and replace any that have blown. If your Trezia starts after this, it was a successful, inexpensive repair! However, if it still won’t start, even sometimes, the ignition switch itself could be the cause of the issue. Warning lights on the dashboard could also mean a damaged sensor. These can be intricate issues needing a qualified mechanic to identify and properly repair (see below advice on local mechanics).

How to Prevent Starting Issues in a Subaru Trezia

As dad would say: “An ounce of prevention is worth a pound of cure”. Here’s how to avoid future troubles starting your Trezia:

Regular Upkeep of Your Subaru Trezia

Regular maintenance on car to prevent starting issues

Regular maintenance is critical to avoiding issues, including oil changes, battery checks, cleaning terminals, replacing the fuel filter as needed, and having a mechanic inspect the vehicle routinely. If unsure about maintenance for your model, ask a mechanic locally or online for guidance.

Drive Your Trezia Regularly

drive regular to avoid car troubles

If your Subaru Trezia happens to sit unmoved in your garage or driveway for too long without being driven, the battery can decrease as it is not being recharged by the engine running, through the alternator. Try your best to drive your car regularly to maintain a charged battery. If you remember you haven’t driven your car in a while, take it for a brief drive around town to ensure there is still a charge left.

Note: Letting the battery completely run out of charge is also bad for its longevity, so try to avoid that.

Pay Attention to Warning Signs

Check Engine Control Light on a Vehicle Dashboard

If you notice any irregular things like unusual noises, changes in driving and performance, or warning lights lit up on the dashboard, do not ignore them. These are often early signs of an issue that should be addressed ASAP before they escalate into larger problems later on. Consult with a mechanic locally or online about these problems and get advice on if they require attention.

When to Ask a Subaru Mechanic Online

If your schedule is packed, or you gave fixing the no start yourself an honest effort but with no luck, consider consulting a Subaru mechanic online. It delivers quick professional advice from the comfort of your living room, and is far less expensive than a tow and diagnosis at the local garage.

Advantages of an Online Subaru Mechanic

Happy mechanic repairing car looking at camera

Online Subaru mechanics can review your symptoms, past repair history, and circumstances to provide troubleshooting steps tailored to your situation. With so many Subaru mechanics available they can help fix nearly any problem, it doesn’t if matter it’s your Trezia that’s having issues or a Subaru RV won’t start, the online mechanics can help sort anything in no time. And with many household budgets tighter these days, an online mechanic provides instant affordable help when you need it most, 24/7.

You can explain the issues you’re having, ask Subaru mechanics unlimited questions, and even submit pics and videos so you can demonstrate to the mechanic what you mean. You can chat with them via online chat or phone call, whichever you prefer. The Subaru mechanic will diagnose the problem, recommend the best fix for your particular case, and even guide you on basic repairs step-by-step.

Whether you want an expert second opinion or are simply short on time, online repairs assistance is there when you need it. Give it a try to see firsthand how convenient fixing problems can be.

So feel free to try out our ask the Subaru mechanic service and see for yourself!

When and How to Get a Local Subaru Mechanics Help

automobile mobile mechanic

When your Subaru Trezia won’t start, and you are unable to repair it yourself, thinking about how to get your vehicle to the garage can be a nightmare. There are options like roadside services, that come to you and can provide simple fixes to get your car moving enough again, so you can get it to a mechanic garage for proper repairs. You can also use a towing service, but these can be costly, easily into the hundreds of dollars. A much better option is the use of a mobile mechanic, who will come to you at your home, place of work, or by the roadside, and carry out repairs there and then for you, so you can get your Trezia started again ASAP.

So if you think a mobile mechanic is the best solution for you, instead of searching on Google something like  “house call auto mechanic near me“, the best in the USA that also covers most towns is YourMechanicI have personally recommended them to countless people across the country and they always have a great experience.

Reasons I recommend them:

  • They use experienced ASE-certified mechanics
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  • You see the price upfront, no surprises or hidden fees
  • Low Cost compared to regular garages

If you would like to know more, the process to use them is this.

  1. Visit their official website here: YourMechanic
  2. Get an instant free quote for what you need
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Super easy, super reliable, super convenient, and highly recommended.

Conclusion

In short, when your Subaru Trezia won’t start, it can be a major inconvenience. However, grasping what might be triggering the issues, being able to troubleshoot them, and knowing what actions are required in each case, and where to find help if necessary, will be a huge help. Keep in mind that regular care is key to preventing most vehicle problems.

Frequently Asked Questions (FAQs) When a Subaru Trezia Won’t Start

Subaru Trezia won’t start but lights turn on?

If your Subaru Trezia‘s lights illuminate but it still won’t start, the issue is likely not related to the battery. It’s highly possible there is a problem with the starter motor. Investigate if you hear any clicking noises when trying to turn the key. If so, the starter motor is attempting to activate but failing. Get a mechanic check over the starter motor – it may need to be repaired or replaced.

Subaru Trezia won’t start but has power?

When your Subaru Trezia has power (lights, radio etc work) but fails to start, there may be a fuel delivery problem. Issues like a faulty fuel pump relay could prevent fuel getting to the engine. Without enough fuel, combustion can’t happen and the engine won’t start. Listen near the back seat when turning the key – you should hear the fuel pump prime for a few seconds. If not, get a mechanic check the fuel system.

Subaru Trezia won’t start but battery is good?

If your Subaru Trezia‘s battery tests fine and is fully charged, but the car still refuses to start, the underlying cause is likely electrical. Possible issues include a bad ignition switch, broken sensor, or wiring problems. As electrical issues can be tricky, diagnosis by a professional mechanic is best. They can accurately identify the specific electrical fault and have it repaired.

Subaru Trezia won’t start just clicking?

When you turn the key and there’s only a clicking noise but the engine doesn’t crank, the most common cause is a faulty starter motor. The click comes from the starter solenoid trying to engage the starter motor, but the motor itself fails to crank the engine. As the starter motor needs mechanical repair or replacing, seek help from a reliable mechanic to get your Subaru Trezia running again.

What if my Subaru Trezia won’t start up?

First things first, take a deep breath and try to stay calm. Check for any odd noises, flashing lights, or changes in how it runs that could point to the issue. Most likely the culprit is one of the common problems we will talk about here. If you still can’t locate the exact issue, you’ll have to consult a trusted Subaru mechanic locally or online.

How do I know if my Subaru Trezia won’t start because of the battery?

Clues that your Subaru’s battery is the issue are, a slow cranking engine, dim front lights, and battery alerts lighting up on the dash. You can also make sure the battery terminals are clean, corrosion-free, and tightly fastened. If your battery is older it’s probably best to just replace it fully.

How to prevent my Subaru Trezia from failing to start in the future?

To prevent this frustration from repeating, regular upkeep is crucial. This includes oil changes, testing the battery and cleaning its terminals, replacing the fuel filter when required, and getting your Subaru Trezia checked out by a mechanic frequently. Also, remember to drive the car regularly so the battery stays charged.

Can I consult an online mechanic if my Subaru Trezia fails to start up?

Yes, you can. An online mechanic service like ours can offer immediate expert Subaru mechanic aid and suggestions, without you having to leave your residence. If your vehicle fails to start and is immobile in the driveway, this is especially useful.

How can platforms like MechanicAnswer.com be of service if my Subaru Trezia fails to start?

We pair you with certified Subaru mechanics who can provide suggestions tailored to your individual situation. You can inform them about your vehicle problems, ask unlimited questions as needed, and even submit images and videos so you can fully detail the problem. The specialist auto mechanic will be able to help, pinpoint the issue, and propose the best remedy and talk you through it.

Interesting Subaru Trezia Facts

Did you know that the Subaru Trezia is actually a rebadged version of the Toyota Verso-S? That’s right, this compact MPV is a collaboration between Subaru and Toyota, and it’s packed with some pretty cool features. For starters, it’s got a surprisingly spacious interior, with plenty of head and legroom for both the driver and passengers. And despite its compact size, the Trezia offers impressive fuel efficiency, making it perfect for city driving. Plus, with its nimble handling and smooth ride, it’s a joy to drive on winding roads. So if you’re feeling stuck with your Trezia right now, just remember all the awesome features that make it such a unique and fun car to own!

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Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just £5.
  2. Get help from a Mobile Mechanic. We  recommend Fixter. They will come to you and fix your vehicle at a time that suits you. Instant free quote online below. We recommend the online mechanic first, as it’s cheaper for you, and you may not need an in-person mechanic.

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just $5.
  2. Get in-person help from a Mobile Mechanic. We recommend YourMechanic. They will come to you and fix your vehicle at a time that suits you. Instant free quote online below. We recommend the online mechanic first, as it’s cheaper, and you may not need an in-person mechanic.

Choose Your Mechanic

1. Chat with A.I. Mechanic (Robot Robby)
  • Free 7-day trial
  • A.I. Mechanic that is trained by our human mechanic writers. As helpful as a human mechanic for expert advice, troubleshooting, and repair guidance.
2. Chat with a Human Mechanic Online
  • Join for just $5, and $39/month. Cancel anytime
  • Real human ASE-certified mechanics available 24/7

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just $5.
  2. Get in-person help from a Mobile Mechanic Near You. They will come to you and fix your vehicle at a time that suits you. If there are none near you, you will be redirected to the online mechanic.

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just £5.
  2. Get help from a Mobile Mechanic. We  recommend Fixter. They will come to you and fix your vehicle at a time that suits you. Instant free quote online below. We recommend the online mechanic first, as it’s cheaper for you, and you may not need an in-person mechanic.

Which Mechanic Suits You?

  1. Chat with an Online Mechanic to get instant, unlimited help and advice for 1 full week, for just $5.
  2. Get in-person help from a Mobile Mechanic. We recommend YourMechanic. They will come to you and fix your vehicle at a time that suits you. Instant free quote online below. We recommend the online mechanic first, as it’s cheaper, and you may not need an in-person mechanic.

Where Can I Find My VIN?

Your vehicle’s unique Vehicle Identification Number (VIN) can be found on the title document, the vehicle registration, and the insurance policy. It is a series letters and numbers like this as example: WAUGC0896JA235262. The VIN can also be located on the following locations on the vehicle itself:

how to find VIN on vehicle