Mystery solved: why your subaru forester won’t start (and how to fix it)

If you’re facing the frustrating issue of your Subaru Forester not starting, don’t panic. This common problem can be caused by various factors, and there are several steps you can take to troubleshoot and resolve it.

Possible Causes of Subaru Forester Not Starting

• Dead or Weak Battery: A discharged battery is a primary culprit for starting problems.
• Faulty Starter: A malfunctioning starter motor can prevent the engine from cranking.
• Ignition Switch Issues: A faulty ignition switch may not engage the starter or provide power to the ignition system.
• Fuel System Problems: Clogged fuel filters, faulty fuel pumps, or fuel injector issues can disrupt fuel delivery to the engine.
• Electrical Problems: Loose or damaged electrical connections, faulty relays, or a bad alternator can affect the ignition process.
• Engine Mechanical Issues: Internal engine problems, such as low compression or a seized engine, can prevent the engine from starting.
• Immobilizer System Malfunction: The anti-theft immobilizer system may malfunction and prevent the engine from starting.

Troubleshooting Steps

1. Check the Battery

• Use a voltmeter to test the battery voltage. It should be around 12.6 volts when fully charged.
• Inspect the battery terminals for corrosion or loose connections. Clean them if necessary.
• Attempt to jump-start the car using jumper cables connected to a known-good battery.

2. Inspect the Starter Motor

• Locate the starter motor and check for any visible damage or loose connections.
• Tap the starter gently with a hammer while someone tries to start the car. If the engine cranks, the starter may be faulty.
• Test the starter relay by bridging the terminals with a screwdriver. If the engine cranks, replace the starter relay.

3. Examine the Ignition Switch

• Turn the ignition key to the “On” position and check if the dashboard lights illuminate.
• If the lights don’t come on, the ignition switch may be faulty.
• Try wiggling or turning the key slightly to see if it engages the starter.

4. Check the Fuel System

• Inspect the fuel lines and fuel filter for any leaks or obstructions.
• Listen for the fuel pump running when you turn the ignition key to the “On” position.
• If you suspect a fuel injector issue, have it diagnosed and replaced if necessary.

5. Inspect Electrical Connections

• Check all electrical connections related to the ignition system, including the battery terminals, starter connections, and ignition switch wiring.
• Look for loose or damaged wires and repair or replace them as needed.
• Test the alternator by checking its output voltage with a voltmeter.

6. Rule Out Engine Mechanical Issues

• If the starter cranks but the engine doesn’t start, suspect mechanical issues.
• Check the spark plugs and replace them if they’re worn or damaged.
• Use a compression tester to measure the engine compression. Low compression may indicate a more serious engine problem.

7. Check the Immobilizer System

• If the engine cranks but doesn’t start, the immobilizer system may be engaged.
• Contact a Subaru dealership or qualified mechanic to diagnose and reset the system.

Wrapping Up: Final Thoughts

If your Subaru Forester does not start, follow these troubleshooting steps to identify and resolve the issue. Remember to approach the problem systematically and consult a mechanic if you encounter any complexities. Regular maintenance and professional assistance can help prevent starting problems and ensure the smooth operation of your vehicle.

Frequently Asked Questions

Q: Why won’t my Subaru Forester start when it’s cold outside?
A: Cold temperatures can weaken the battery, making it harder to start the engine. Ensure your battery is in good condition and fully charged.

Q: What does it mean when my Subaru Forester cranks but doesn’t start?
A: This could indicate fuel system problems, ignition switch issues, or more serious engine mechanical issues. Further diagnosis is necessary to determine the exact cause.

Q: How do I reset the immobilizer system on my Subaru Forester?
A: Contact a Subaru dealership or qualified mechanic to properly diagnose and reset the immobilizer system. Attempting to do it yourself may cause further problems.