2011 Hyundia Elantra no start overnight

val319B to Mechanic Advice@gearhead.townEnglish · 10 months ago

I installed a new battery, brake pedal sensor, switch inhibitor.

The issue is if it sits overnight it won’t start. The push button doesn’t start. The omdb II shows nothing. No codes.

Here’s what happens. I go to start and the immobilizer light comes on. It doesn’t blink. I put in neutral because power stays on then and wait. Within 10 minutes it sees the fob. Light goes out and it’ll start. I have 2 fobs. New batteries. Hold it to button. Doesn’t change anything. I have to wait. Brake lights are not on when I turn it off. They aren’t staying on. Brake sensor feels right.

Any suggestions? I keep the fobs in a faraday box. It’s always been cranky about multiple fobs. I was leaving the key hanging by the door. I was reminding it wasn’t the safest so I’ve been putting in the box. My concern is I take to the dealer there’s no codes. Once started we’re good a while.

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