How To Remote Start Nissan Altima 2015

So, you're having trouble remote starting your 2015 Nissan Altima? You're not alone! A lot of Altima owners experience issues with the remote start system, and it can be frustrating, especially on those cold mornings or sweltering afternoons. Getting your remote start working reliably is important for convenience, comfort, and even resale value. Let's troubleshoot this together.

Symptoms of Remote Start Problems in a 2015 Nissan Altima

Here's a detailed list of symptoms you might be encountering:

• The most common symptom: Pressing the remote start button on your key fob does nothing. No lights, no sounds, no engine start.
• The vehicle attempts to start (you might hear a click or the engine turning over briefly), but then it shuts off immediately.
• The hazard lights flash continuously when you try to remote start the vehicle, but the engine doesn't start.
• The horn honks repeatedly when attempting remote start.
• The remote start works intermittently – sometimes it starts, sometimes it doesn't.
• The remote start used to work fine, but suddenly stopped working.
• The 'Security' light on the dashboard flashes rapidly when attempting remote start.
• The car starts with the key in the ignition, but the remote start functionality is completely disabled.
• The remote start works but the climate control settings don't activate (e.g., the heat doesn't turn on in cold weather).
• The remote start only works when you're standing very close to the vehicle.

Root Causes of Remote Start Failure

Several things can cause your 2015 Altima's remote start to malfunction. Here’s a breakdown of the most likely culprits:

1. Hood Switch Malfunction

This is a very common issue. Your Altima has a hood switch (also called a hood latch sensor) that detects if the hood is securely closed. For safety reasons, the remote start is disabled if the system thinks the hood is open. Over time, this switch can become corroded, damaged, or simply misaligned. Even a slightly loose hood can trigger the sensor.

2. Key Fob Issues

Your key fob itself might be the problem. This can include:

• Low Battery: The most straightforward cause. A weak battery can prevent the fob from transmitting a strong enough signal.
• Damage: The fob could be physically damaged (dropped, water damage, etc.).
• Programming: The fob might need to be reprogrammed to the vehicle. Sometimes the connection between the fob and the car's computer gets lost.

3. Vehicle System Issues

Several vehicle systems can prevent the remote start from functioning correctly:

• Check Engine Light (CEL): If your check engine light is on, the remote start will likely be disabled. This is a safety feature to prevent further damage if there's a serious engine problem.
• Low Fuel Level: Some vehicles disable remote start when the fuel level is very low.
• Security System Issues: Problems with the vehicle's anti-theft system can interfere with the remote start.
• Faulty Sensors: Issues with other sensors, such as the brake pedal sensor, can also disable remote start.

4. Wiring Problems

Damaged or corroded wiring in the remote start system can also cause problems. This is more likely if the vehicle has been involved in an accident or if there's been water damage.

5. Aftermarket Accessories

If you've had any aftermarket accessories installed (e.g., an aftermarket alarm system), they might be interfering with the remote start system.

What Happens If You Ignore Remote Start Problems?

Ignoring a malfunctioning remote start system might seem like a minor inconvenience, but it can lead to more significant problems down the line:

• Increased Discomfort: You'll have to deal with a cold car in the winter and a hot car in the summer.
• Potential Battery Drain: A faulty remote start system can sometimes drain the vehicle's battery.
• Underlying Problems: A disabled remote start can be a symptom of a more serious underlying mechanical or electrical issue. Addressing it early can prevent more expensive repairs later.
• Decreased Resale Value: A non-functional feature can negatively impact the vehicle's resale value.

Recommended Fixes

Here's a breakdown of recommended fixes, starting with the simplest:

1. Check the Key Fob

Solution: Replace the battery in your key fob. Use a quality battery and make sure it's installed correctly. If you have a spare key fob, try using it to see if the problem lies with the original fob.

2. Inspect the Hood Switch

Solution: Locate the hood switch. It's usually near the hood latch. Clean the switch and the surrounding area with a contact cleaner. Make sure the hood is closing completely and engaging the switch properly. You can try manually pressing the switch to see if it activates the remote start. If the switch is damaged, it will need to be replaced.

Tip: Some owners have temporarily bypassed the hood switch (for testing purposes only!) by disconnecting it and bridging the connector with a short piece of wire. Do not do this permanently as it removes a crucial safety feature. This is only a diagnostic step to see if the hood switch is the problem.

3. Check Engine Light Diagnosis

Solution: If your check engine light is on, have the vehicle scanned for diagnostic trouble codes (DTCs). You can do this at most auto parts stores for free, or at your local mechanic. Address any issues identified by the codes. Once the underlying problem is fixed and the check engine light is cleared, the remote start should work again.

4. Check Fuel Level

Solution: Ensure your fuel level is above the low fuel warning. Fill up the tank if necessary.

5. Check Door Locks

Solution: Make sure all doors, the hood, and the trunk are securely closed. Sometimes a slightly ajar door can prevent the remote start from working.

6. Reprogram the Key Fob

Solution: The key fob may need to be reprogrammed to the vehicle's computer. The procedure for reprogramming can vary depending on the trim level. It's best to consult your owner's manual or a qualified mechanic. Some dealerships offer key fob programming services.

7. Consult a Professional Mechanic

Solution: If you've tried all the above steps and the remote start still isn't working, it's time to consult a professional mechanic. They have the tools and expertise to diagnose more complex electrical issues and perform necessary repairs.

Cost Estimates and Shop Advice

Here are some rough cost estimates for potential repairs:

• Key Fob Battery Replacement: $5 - $10
• Hood Switch Replacement: $50 - $150 (parts and labor)
• Key Fob Reprogramming: $50 - $150 (depending on the dealership or locksmith)
• Diagnostic Scan (Check Engine Light): Free (at many auto parts stores) to $100 (at a mechanic)
• Electrical System Diagnosis: $100 - $300 (depending on the complexity of the issue)

Shop Advice:

• When choosing a mechanic, look for one that specializes in automotive electrical systems.
• Be sure to explain all the symptoms you're experiencing to the mechanic.
• Ask for a detailed estimate before any work is performed.
• Don't be afraid to get a second opinion.

Credibility and Additional Information

While I couldn't find a specific TSB (Technical Service Bulletin) specifically for the 2015 Altima remote start issue, problems with hood switches and key fob programming are common across many Nissan models. Online forums dedicated to Nissan Altima owners often discuss these remote start issues, with the hood switch being a frequent topic. Many users report experiencing these problems around the 50,000-100,000 mile mark, although this can vary depending on driving conditions and maintenance.

Addressing your remote start problem promptly can save you time, money, and frustration in the long run. By following these troubleshooting steps, you can hopefully get your 2015 Nissan Altima's remote start working reliably again. Good luck!