Key FOB Not Working. - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 25 (permalink) Old 07-05-2013, 11:31 AM Thread Starter
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Key FOB Not Working.

In fact the dealer said the car would not communicate at all. So it's not the FOB.

I bet its because my aftermarket harness is the one that disables onstar. Is my guess right? I don't want to spend $100 on a harness if it's something else as I don't care about onstar, I just want my FOB to work. (never knew if it worked before as I replaced the radio before getting an FOB programmed).

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post #2 of 25 (permalink) Old 07-05-2013, 12:56 PM
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Which RPO do you have AU0,AP3 or AP8?

---------- Post added at 04:56 PM ---------- Previous post was at 04:56 PM ----------

Do you have TPMS?

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post #3 of 25 (permalink) Old 07-05-2013, 03:33 PM Thread Starter
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Quote:
Originally Posted by Coby7 View Post
Which RPO do you have AU0,AP3 or AP8?

---------- Post added at 04:56 PM ---------- Previous post was at 04:56 PM ----------

Do you have TPMS?
no clue what you're asking with the first question, but yea tpms.

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post #4 of 25 (permalink) Old 07-05-2013, 05:23 PM
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If you have TPMS you have an RCDLR, if your TPMs work that means your RCDLR works because it's the same module and translater. In my opinion and it's an opinion only is " Your remotes must be defective. Take them apart check the battery and clip then make sure the back of your buttons still have carbon on them.

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post #5 of 25 (permalink) Old 07-05-2013, 06:09 PM Thread Starter
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the dealer said they tried all their equipment and was unable to get the car to communicate? Idk what they're going with or using. My remote is a cheap ebay one so I wouldn't doubt the remote was bad, but they said it wasnt just the remote?

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post #6 of 25 (permalink) Old 07-05-2013, 06:26 PM
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Amateurs! In your trunk should be an RPO sticker with all the options of your car. Check if you have one of these AU0, AP3 or AP8

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post #7 of 25 (permalink) Old 07-06-2013, 05:23 AM Thread Starter
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I hate to be needy, but where in the trunk? I know by vin lookup they said it should have had a fob, but no remote start if that helps. Thanks for your help btw! Glad I didn't just go out and buy the harness.

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post #8 of 25 (permalink) Old 07-06-2013, 05:34 AM
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Under the mat to the left of the spare tire.

---------- Post added at 09:34 AM ---------- Previous post was at 09:32 AM ----------

What year is your car?

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post #9 of 25 (permalink) Old 07-06-2013, 07:31 AM Thread Starter
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sweet. I see AU0 only, and its a 2008...whats that mean? lol

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post #10 of 25 (permalink) Old 07-06-2013, 08:02 AM
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Means you need a 15252034 key FOB

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