remote start not working and check engine light on

3 min read 20-08-2025
remote start not working and check engine light on


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remote start not working and check engine light on

Having your remote start fail while simultaneously facing a lit check engine light can be frustrating. This combination suggests a potential underlying problem that needs attention. This guide will walk you through troubleshooting steps to pinpoint the cause and get your remote start working again. Remember, safety is paramount; if you're unsure about any step, consult a qualified mechanic.

What Could Be Causing This?

Several factors can lead to both your remote start malfunctioning and the check engine light illuminating. The connection might be direct, or they could be coincidental issues. Let's explore some common culprits:

  • Low Battery: A weak car battery can prevent the remote start system from functioning correctly. The check engine light might not directly relate, but a low battery can trigger various system errors.
  • Faulty Remote Start System: The remote start unit itself might be malfunctioning, either due to internal failure or a connection problem.
  • Security System Issues: Problems with your car's security or immobilizer system can interfere with the remote start.
  • Vehicle System Malfunction: The check engine light indicates a problem with your vehicle's engine or related systems. This could be something as simple as a loose gas cap or a more serious issue. This underlying problem could also be preventing the remote start from functioning.
  • Software Glitch: Sometimes, a software glitch in your car's computer system can affect multiple functions, including the remote start and trigger the check engine light.

How to Troubleshoot the Problem

Let's address potential solutions systematically:

1. Check Your Car Battery

This is the easiest and most common cause. Start by checking the battery voltage using a multimeter. If the voltage is low, recharge or replace the battery. Often, a jump start will temporarily resolve this if the battery is only slightly discharged.

2. Inspect Fuses and Relays

Your car's remote start system uses fuses and relays to protect the electrical components. Check your vehicle's owner's manual to locate and inspect the relevant fuses and relays. Replace any blown fuses or faulty relays.

3. Examine the Remote Start Unit

Depending on your vehicle's setup, the remote start unit might be easily accessible under the dashboard or elsewhere. If you are comfortable working with automotive electrical systems, you can inspect the unit for any visible damage or loose connections. If you're not comfortable with this, seek professional help.

4. Diagnose the Check Engine Light

The check engine light is crucial. You need to get the diagnostic trouble codes (DTCs) read using an OBD-II scanner. This will give you clues about the specific problem causing the light. Many auto parts stores offer free code reading services. The DTCs will help you and/or your mechanic narrow down the source of the problem.

5. Check the Remote Itself

Ensure the remote's battery is working correctly. Try replacing the battery as a simple first step. Also, check for any physical damage to the remote.

6. Consider Software Issues

In some cases, a software update for your car's system might resolve the problem. Consult your vehicle's owner's manual or a dealership to see if a software update is available.

7. Consult a Professional

If you've tried the above steps and the issue persists, it's best to consult a qualified mechanic or the dealership. They possess the diagnostic equipment and expertise to accurately identify and resolve the problem.

Frequently Asked Questions

What does a flashing check engine light mean?

A flashing check engine light usually indicates a more serious issue that requires immediate attention to prevent further damage to your engine. Get it checked immediately.

Can a bad battery cause the check engine light to come on?

Yes, a weak or failing battery can cause the check engine light to illuminate because the car's computer may detect voltage irregularities.

How much does it cost to fix a remote start problem?

The cost varies greatly depending on the cause. It could range from a simple fuse replacement (a few dollars) to a complex repair of the remote start unit or underlying vehicle systems (hundreds or even thousands of dollars).

Can I disable my remote start system?

Usually, you can disable your remote start system via a switch or a setting within your car's options menu. Check your owner’s manual for instructions.

By following these steps, you'll be well on your way to diagnosing and resolving the problem with your remote start and check engine light. Remember, safety first, and don't hesitate to seek professional help if needed.