Subaru Key Fob Is Programmed But Car Won't Start

Your Subaru key fob is programmed, the lights flash, but the engine stubbornly refuses to turn over. This is a frustrating scenario, and one we see frequently at KEYFOBPROG. Let’s explore the reasons why your programmed Subaru key fob might not be starting your car and how you can get back on the road.

Common Reasons Why a Programmed Subaru Key Fob Won’t Start the Car

Several factors can contribute to this issue, ranging from simple battery problems to more complex immobilizer system malfunctions. Identifying the root cause is the first step to finding a solution. Is it the key fob, the car, or something else entirely?

Key Fob Issues

Weak Key Fob Battery: This is the most common culprit. Even if the key fob lights up, a weak battery may not have enough power to transmit the signal to the car’s immobilizer system.
Damaged Key Fob: Physical damage to the key fob, such as a cracked casing or water damage, can interfere with the internal circuitry and prevent it from functioning correctly.
Key Fob Programming Errors: While you believe the key fob is programmed, there might have been an error during the programming process. This can happen if the incorrect procedure is followed or if there’s an interruption during programming.

Car Issues

Immobilizer System Malfunction: The immobilizer system is designed to prevent theft, but it can malfunction and prevent the car from starting even with a programmed key fob. This could be due to a faulty antenna, wiring issue, or a problem with the immobilizer control module.
Low Car Battery: A weak or dead car battery can prevent the car from starting, even if the key fob is working correctly. This is often mistaken for a key fob problem.
Faulty Ignition Switch: A malfunctioning ignition switch can also prevent the car from starting. This is a less common issue, but it’s worth considering.
Other Mechanical Problems: Sometimes, the issue isn’t related to the key fob or the immobilizer system at all. It could be a fuel pump issue, a starter motor problem, or another mechanical fault.

Replacing the Battery in Your Subaru Key Fob

Troubleshooting Your Subaru Key Fob and Car Starting Problems

Here’s a step-by-step guide to troubleshoot the issue:

Check the Key Fob Battery: Start with the simplest solution. Replace the key fob battery with a new one. Make sure it’s the correct type.
Try the Spare Key Fob: If you have a spare key fob, try using it to start the car. If the spare key works, it confirms the issue lies with the original key fob.
Inspect the Key Fob: Check for any physical damage, cracks, or water damage.
Check the Car Battery: Ensure the car battery has sufficient charge. Try jump-starting the car to see if a low battery is the culprit.
Check for Error Codes: Use an OBD-II scanner to check for any diagnostic trouble codes related to the immobilizer system. These codes can provide valuable clues about the source of the problem.

Checking for Diagnostic Trouble Codes in a Subaru

When to Seek Professional Help

If you’ve tried these troubleshooting steps and the car still won’t start, it’s time to seek professional help. A qualified auto locksmith or Subaru dealership can diagnose the problem accurately and provide the necessary repairs or reprogramming services.

Expert Insight from John Smith, Senior Auto Technician at KEYFOBPROG

“Often, car owners assume it’s a complex issue when their Subaru won’t start with a programmed key fob. However, a simple battery replacement in the key fob solves the problem in a surprising number of cases.”

Another Perspective from Sarah Jones, Lead Programmer at KEYFOBPROG

“While a weak key fob battery is a common cause, don’t overlook the possibility of a faulty immobilizer system. We’ve seen instances where a malfunctioning antenna or control module was the root cause.”

Conclusion

A programmed Subaru key fob that won’t start the car can be a frustrating experience. By systematically troubleshooting the key fob, the car battery, and the immobilizer system, you can often identify the root cause and find a solution. If the problem persists, seeking professional assistance from a qualified auto locksmith or your Subaru dealership is the best course of action. Remember, KEYFOBPROG is always here to assist you with your Subaru key fob programming and replacement needs.

FAQ

How do I know if my key fob battery is weak?
Can I program a Subaru key fob myself?
What is the cost of replacing a Subaru key fob?
How does the Subaru immobilizer system work?
What should I do if my spare key fob also doesn’t work?
How can I prevent future key fob problems?
Where can I find a reliable auto locksmith for Subaru Key Fob Programming?

Situations:

Situation: The key fob battery is dead. Solution: Replace the key fob battery.
Situation: The key fob is damaged. Solution: Replace the key fob.
Situation: The immobilizer system is malfunctioning. Solution: Have the immobilizer system diagnosed and repaired by a qualified technician.
Situation: The car battery is dead. Solution: Jump-start or replace the car battery.

Subaru Key Fob Is Programmed But Car Won’t Start