Remote Start and Check Engine Light Connection

Remote start systems and check engine lights are interconnected in modern vehicles. While a remote start typically cannot directly cause a check engine light to illuminate, the presence of a check engine light will often disable remote start functionality as a safety precaution.
Remote Start Systems
Remote start systems allow drivers to start their vehicle's engine from a distance using a key fob or smartphone app. These systems are designed with various safety features to prevent issues when starting the engine remotely.
Safety Precautions
Most remote start systems are programmed to disable functionality if certain conditions are not met. This includes situations where the check engine light is illuminated, indicating a potential problem with the vehicle.
Check Engine Light
The check engine light, also known as the malfunction indicator lamp (MIL), alerts drivers to potential issues with the vehicle's engine, emissions system, or other critical components.
Common Causes
Some common reasons for a check engine light to come on include:
- Loose or faulty gas cap
- Malfunctioning oxygen sensor
- Catalytic converter issues
- Spark plug or ignition coil problems
- Mass airflow sensor malfunction
Connection Between Remote Start and Check Engine Light
When a check engine light is illuminated, it typically indicates that the vehicle's onboard diagnostic system has detected an issue. As a safety measure, most remote start systems are designed to be disabled when the check engine light is on.
Why Remote Start is Disabled
The reasoning behind this safety feature includes:
- Preventing potential damage to the engine
- Avoiding exacerbation of existing issues
- Ensuring the vehicle is in proper condition before starting remotely
Troubleshooting
If your remote start system stops working and you notice the check engine light is on:
1. Check your gas cap to ensure it's properly tightened
2. Use an OBD-II scanner to read any error codes
3. Address the underlying issue causing the check engine light
4. Once the issue is resolved and the light turns off, remote start should function again
Conclusion
While a remote start system itself is unlikely to cause a check engine light to come on, the presence of a check engine light will often disable remote start functionality. This is a built-in safety feature designed to protect your vehicle. If you experience issues with both your remote start and check engine light, it's best to diagnose and address the underlying problem causing the check engine light to illuminate.
FAQs About Remote Start and Check Engine Light
- Can using remote start cause a check engine light?
Generally, no. Remote start systems are designed to work with your vehicle's existing systems and should not cause a check engine light on their own. - Why won't my remote start work when the check engine light is on?
Most remote start systems are programmed to disable functionality when the check engine light is on as a safety precaution to prevent potential damage to the engine. - How can I fix my remote start if it's not working due to a check engine light?
Address the underlying issue causing the check engine light. Once the problem is resolved and the light turns off, the remote start should function again.
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