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P1685 code...Did I jump the gun?

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Old 28 Mar 2014, 03:09 pm
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Join Date: Mar 2014
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Default P1685 code...Did I jump the gun?

first post to the forum. I hope everyone is well.
I own a 2001 PT w/ 208,000 miles. My wife ordered it new in fall 2000.
She purchased a newer vehicle, recently, so instead of driving my 3/4 ton pick-up 60 miles to work, I'm styling in the PT saving gas!
Recently, key would not turn in the ignition...after checking a few forums, I replaced ignition switch "tumbler" (barrel & key). Car started once, but only briefly, then cut off.
I now get this code :
"P1685 Smart key immobilizer module has received an invalid key"

I obviously put a key & tumbler in it doesn't recognize...can I get the car running myself (reset this) or does it have to go to a service center or Chrysler dealership to be reprogrammed?

Thanks in advance for any help or advice.
all my best,
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Old 28 Mar 2014, 07:55 pm
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Join Date: Jun 2013
Location: Corpus Christi,Tx.
Posts: 3,485
Question Re: P1685 code...Did I jump the gun?

Originally Posted by rustintampa View Post
I replaced ignition switch "tumbler" (barrel & key).
Did you set the tumblers to match your original keys,or are you using keys that came with the new cylinder?

Like this:

2003 PT Cruiser (Base-N/A) Patriot Blue Pearl Purchased @ Police Impound Auction for $1,000.

Last edited by randyincctx; 28 Mar 2014 at 07:59 pm.
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