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Old Sep 5, 2017
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I have a 2002 Honda Civic ex the car starts and runs but the immobilizer light blink's and the car runs like it's in limp mode and I've changed out the immobilizer on the ignition switch and it didn't change.
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Old Sep 5, 2017
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Re: Sage

Does a scanner communicate with the PCM?

Alternator mounting bolts were left loose?
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Old Sep 5, 2017
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Re: Sage

The scan tool I used couldn't connect with the PCM and the alternator was loose.
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Old Sep 5, 2017
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Re: Sage

and the alternator was loose.
This is the direct cause of the PCM being ruined.
Yes I said ruined.
If it cannot communicate with a scanner, it's ruined.

Root cause of the entire ordeal would be whomever forgot to tighten those alternator bolts.



Fix alternator hardware issues, replace PCM, and program replacement PCM to the immobilizer so the engine can run (dealer or locksmith?).
Or maybe get a used PCM with the ignition lock/keys/immobilizer as a matched set.
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Old Sep 6, 2017
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Re: Sage

I got a used PCM from pick and pull and a new immobilizer and a new ignition switch and key will they all program to match to make it work.
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Old Sep 6, 2017
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Re: Sage

Originally Posted by Sage Johnson
I got a used PCM from pick and pull and a new immobilizer and a new ignition switch and key will they all program to match to make it work.
That combo will have to be programmed before it will run.
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Old Sep 6, 2017
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Re: Sage

Where would I have to take it to get it programmed to get it to work? Dealer or can I locksmith do it
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Old Sep 6, 2017
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Re: Sage

Any Honda or Acura dealership will have the scanner to program it.



Locksmith...you'll have to call around and ask. Some have the equipment, some don't.
In my little town the locksmith only does this work for American cars.
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Old Sep 6, 2017
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Re: Sage

Ok thank you for your help
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Old Sep 6, 2017
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Re: Sage

OP...technically speaking the title of your post implies you have a problem with yourself
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