Here are some possible causes:
* OBD-II Trouble Codes: The check engine light means there are Diagnostic Trouble Codes (DTCs) stored in the car's computer. You *must* get these codes read. An OBD-II scanner (available relatively inexpensively at auto parts stores) can do this, or a mechanic can. The codes will provide crucial clues to the problem.
* Low Battery Voltage: A weak battery can cause erratic remote start behavior and trigger the check engine light (though usually for a different code than a failing component). Get your battery tested for voltage and cranking amperage.
* Faulty Sensors: Various sensors (like the crankshaft position sensor, camshaft position sensor, mass airflow sensor, etc.) can lead to the engine refusing to run properly, causing the remote start to shut down and the check engine light to illuminate.
* Security System Issue: Though less likely, a problem with your car's security system or immobilizer could be interfering.
* Fuel System Problem: Issues with fuel delivery, such as a clogged fuel filter or a faulty fuel pump, could prevent the engine from running consistently.
* Engine Problems: More serious mechanical problems within the engine itself (though less likely to happen so suddenly) could also be to blame.
What to do:
1. Get the OBD-II trouble codes read: This is the absolute first step. The codes will significantly narrow down the possibilities.
2. Have the battery tested: A weak battery is a common culprit for intermittent electrical problems.
3. Consult a mechanic (if needed): Once you have the codes, you can either try to diagnose the problem yourself (if you're mechanically inclined and have the necessary tools/knowledge) or take your car to a qualified mechanic. They can use the codes to pinpoint the problem and perform the necessary repairs.
Do *not* continue to try to use remote start until the problem is solved. Repeated attempts could worsen the situation or drain your battery.
