What's involve in programming a new keyfob?

[bikejog]

I know the dealer would have to cut a physical key, but do they have to pull the ECU or do another kind of re-wiring? Or is this all done via ODB-II?

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[saiko21]

All OBD-ii

 

[slab42]

Yeah, you need a specific tool. Not something you can do yourself.

 

[bikejog]

Yeah, you need a specific tool. Not something you can do yourself.

I wasn't planning on doing it myself. My dealer only gave me one fob said they lost the other one. I want to know exactly what's involve in case they tell me they need to pull the ECU or do re-wiring, then I know they're trying to pull a fast one on me.

 

[slab42]

Yeah, you don't need to do that for sure. I was testing out a programmer for work and programmed a new key to my car (2020 Si sedan) to see how the process went and how the aftermarket programmer worked. It was all done via the obd2 port.

 

[bikejog]

Yeah, you don't need to do that for sure. I was testing out a programmer for work and programmed a new key to my car (2020 Si sedan) to see how the process went and how the aftermarket programmer worked. It was all done via the obd2 port.

The tool erases all current keys first before it lets you program the new one(s) correct? At least I'd hope so because there's still a missing fob out there that's programmed to my car.

 

[domicubarican]

The tool erases all current keys first before it lets you program the new one(s) correct? At least I'd hope so because there's still a missing fob out there that's programmed to my car.

Depends on the programming. Honda HDS allows you to program one or multiple new keys, rewrite keys, or do an "all keys lost" programming. If you want to erase a lost key from the immobilizer and just program the ones you, all keys lost is the way to go...just make sure you have every key you want programmed.

 

[bikejog]

Is there a way to tell how many fobs are programmed to the car? For regular owners without a programmer that is.

 

[domicubarican]

I don't think so, not that I know of.

 

[saiko21]

When I bought my car My dealer said the same thing that they misplaced second key and will mail me once they found. I went to them for something and I collected my second key on that day.

 

[bikejog]

When I bought my car My dealer said the same thing that they misplaced second key and will mail me once they found. I went to them for something and I collected my second key on that day.

Same here except mine was missing instead of "misplaced". Lol.. They didn't have the fob in stock when I took delivery so they told me to come back when it's back in stock. I wish there's a way to check how many fobs are programmed to the car so I know for sure the "missing" fob is erased.

 

[slab42]

The tool erases all current keys first before it lets you program the new one(s) correct? At least I'd hope so because there's still a missing fob out there that's programmed to my car.

I didn't try to do that with mine, so I can't say that it has the ability to delete keys from the car's registry. That might be a dealer thing.

 

[WhiskeyTango]

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