Will alarm cause a no start problem?

Yes, an alarm system can cause a no-start problem if it is malfunctioning or improperly installed. If the alarm is triggered or its immobilizer feature is engaged, it may prevent the vehicle from starting. Additionally, issues with the alarm's wiring or connections can lead to electrical problems that affect the ignition system. It's essential to troubleshoot the alarm system if you suspect it is causing the no-start issue.