Why wont my Subaru engine start?
If your Subaru engine won't start, there could be several potential causes. The most common reasons include a dead battery, a problem with the fuel system, or an issue with the ignition system. Let's explore these potential issues in more detail.
Dead Battery
One of the most common reasons a Subaru engine won't start is a dead or weak battery. Over time, the battery can lose its charge, especially if the vehicle hasn't been driven for an extended period. To check if the battery is the issue, try jump-starting the car or using a battery charger to see if that resolves the problem. If the battery is the culprit, you may need to replace it.
Fuel System Issues
Another potential cause of a Subaru engine not starting is a problem with the fuel system. This could include a clogged fuel filter, a faulty fuel pump, or a problem with the fuel injectors. If the engine is not receiving the proper amount of fuel, it won't be able to start. You may need to have a mechanic diagnose and repair any fuel system issues.
Ignition System Problems
The ignition system is responsible for providing the spark that ignites the fuel in the engine. If there's an issue with the ignition system, such as a problem with the spark plugs, ignition coils, or the ignition control module, the engine won't start. A mechanic can diagnose and repair any ignition system problems.
Other Potential Causes
- Immobilizer or security system issues: If your Subaru's security system is malfunctioning, it may prevent the engine from starting.
- Mechanical issues: In some cases, a more serious mechanical problem, such as a seized engine or a problem with the timing belt, can prevent the engine from starting.
If you've checked the battery, fuel system, and ignition system and the engine still won't start, it's best to have a professional mechanic diagnose and repair the issue. They can use diagnostic tools to identify the root cause and get your Subaru back on the road.
What is the most common engine problem in Subaru?
One of the most notorious issues plaguing Subaru vehicles is head gasket leaks, particularly in older models with the EJ series engines. These leaks can lead to coolant loss, overheating, and potential engine damage if left untreated.
Why does my Subaru car turn on but won't start?
Electrical system issues, such as blown fuses, corroded battery terminals, or damaged wiring, can also prevent a Subaru car from starting. It's essential to inspect the electrical system components and connections for signs of damage or corrosion and address any issues promptly.
How do you force restart a Subaru?
Press and Hold the Power Button: Press and hold the power button for approximately 10-15 seconds until the screen goes blank and the system powers off. Wait a Few Moments: Allow the system to remain powered off for a few moments before pressing the power button again to restart it.
What happens if your car won't start but has power?
If your car has power but won't start, the problem is likely a bad starter motor, an issue with the fuel system, or a faulty ignition switch. You may hear a single click (which can point to a bad starter) or a whirring sound (which can mean a bad starter solenoid). Other less common causes include blown fuses, a security system issue, or a bad alternator.
This video explains the common issues why a car won't start but has power: 55sFixITYouTube · Jan 23, 2025
Common causes
- Starter motor: If you hear a loud click when you turn the key, the starter motor may be failing. It could be getting power, but it isn't able to turn the engine over.
- Fuel system: A bad fuel pump or clogged fuel filter can prevent the engine from getting the necessary fuel to start.
- Ignition switch: A faulty ignition switch may not be sending the "start" signal to the rest of the car, even if the lights and radio work.
- Blown fuse: A blown fuse can cause the car to have no power at all or only partial power, depending on which fuse is blown.
- Security system: Some anti-theft systems can prevent the car from starting as a security measure.
- Alternator: If your battery is getting low, the alternator may be failing and not charging the battery correctly.
What to do
- Check the basics: Make sure the gear shift is firmly in Park or Neutral. Also, check that the battery terminals are clean and tight.
- Listen for sounds: Turn the key to the start position and listen for any sounds. A single loud click points to the starter, a whirring sound suggests a bad starter solenoid.
- Don't keep cranking: Repeatedly cranking the engine can drain the battery further.
- If you suspect a specific issue, such as a blown fuse: Use a multimeter to check the fuses in the fuse box and replace any that are blown.
- If you're still unsure: It's best to have the car diagnosed by a professional to avoid any further damage.
