Rick's Free Auto Repair Advice

Posts Tagged: Alarm system

Car alarm goes off on its own Hyundai Sonata

Fix car alarm goes off on its own Hyundai Sonata If you own a Hyundai Sonata and have this problem: Car alarm goes off on its own Hyundai Sonata or the alarm goes off intermittently, this may be the fix you’re looking for. Hyundai has issued a technical service bulletin (TSB) 09-BE-026. The bulletin applies to other Hyundai vehicles as well: Genesis Genesis Coupe Tiburon Tucson Entourage Elantra Hyundai attributes the problem to light contact with the hood switch pad and the hood switch. Hyundai has revised the part. The … Read More

Misfires – caused by alarm system

What causes a Misfire? Sometimes it’s your alarm system If you’re getting misfires and can’t find the source but have installed an aftermarket alarm  the alarm may be causing them. GM has determined that aftermarket alarm systems that use mechanical relays wired into the ignition system can generate actual ignition misfires that are serious enough to damage the catalytic converter. Mechanical relays have contact points mounted on a spring. Vehicle movement, pot holes, bumps, etc., can jolt the contacts enough to interrupt the ignition circuit for a few milliseconds. That’s … Read More


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