Many car owners face the frustrating situation of their remote starter malfunctioning, often accompanied by the dreaded check engine light illuminating on the dashboard. This combined issue can signal various underlying problems, ranging from simple fixes to more complex repairs. This guide will help you diagnose and troubleshoot why your remote start isn't working and the check engine light is on.
Why is My Remote Starter Not Working?
The failure of your remote start system isn't always directly linked to the check engine light. However, the simultaneous occurrence often points towards a shared problem, such as a faulty component impacting both systems. Let's explore the common culprits.
1. Low Battery: The Silent Culprit
A weak car battery is a prime suspect. The remote start system demands significant power, and insufficient charge can prevent it from engaging. Similarly, a low battery can trigger the check engine light as various vehicle systems rely on consistent power. Check your battery voltage using a multimeter; ideally, it should read above 12.6 volts. If it's low, jump-starting your car might temporarily resolve the issue, but consider replacing your battery if this happens frequently.
2. Faulty Key Fob Battery: A Simple Fix
A seemingly trivial issue, a dead key fob battery can render your remote start useless. Replace the battery in your key fob as a first step. It's an inexpensive and easy fix that might resolve the problem entirely.
3. Issues with the Vehicle's Electrical System
Problems within your car's electrical system can disrupt both the remote start and trigger the check engine light. This can range from blown fuses to damaged wiring or even more complex electrical malfunctions. Checking fuses related to the remote start system (consult your owner's manual) is a crucial step. If a fuse is blown, replace it with one of the correct amperage. However, if the fuse blows again immediately, there's likely a more serious underlying electrical fault requiring professional attention.
4. Problems with the Remote Start System Itself
The remote start system itself could have failed components, such as a faulty receiver, control module, or antenna. These issues are often more challenging to diagnose and typically require a professional mechanic to identify and replace the faulty part.
What Does the Check Engine Light Mean in This Context?
The check engine light, independent of the remote start malfunction, indicates a problem within the vehicle's engine or emission control system. It could be a simple issue (like a loose gas cap) or something more serious requiring immediate attention. Use an OBD-II scanner to read the diagnostic trouble codes (DTCs). This will provide valuable clues about the specific problem triggering the light. Some common causes include:
- Oxygen sensor issues: A faulty oxygen sensor can affect engine performance and fuel efficiency, also triggering the check engine light.
- Mass airflow sensor problems: A malfunctioning mass airflow sensor can disrupt the air-fuel mixture, impacting engine performance and potentially affecting the remote start.
- Spark plug or ignition coil issues: Problems with the spark plugs or ignition coils can lead to misfires, causing the check engine light and potentially interfering with the remote start.
How to Troubleshoot Remote Start and Check Engine Light Issues
- Check the key fob battery. This is the easiest and cheapest fix to try first.
- Check your car battery. A low battery can affect many systems, including the remote start.
- Inspect fuses. Check the fuses related to the remote start system in your car's fuse box (refer to your owner's manual).
- Use an OBD-II scanner. This tool will read diagnostic trouble codes from your car's computer, helping you identify the root cause of the check engine light.
- Consult your owner's manual. This manual will provide valuable information specific to your vehicle's remote start system and troubleshooting.
- Seek professional help. If you're unable to diagnose the problem yourself, take your car to a qualified mechanic for a professional diagnosis and repair.
By systematically investigating these potential issues, you'll significantly increase your chances of resolving the remote start problem and addressing the cause of your check engine light. Remember, ignoring the check engine light can lead to more significant and costly problems down the line.
