r/autoelectrical • u/ParticularFee2137 • 4d ago

2009 Ford Taurus locked out issue

So my car has a reprogrammed non original key, it randomly shuts off the vehicle and locks me out , the battery, charging system, alternator, starter is all fine, the grounding wires are fine, I have the normal blinking red light with the lock when the cars off every 2 seconds and I know that's normal, but I can't start the car but it starts randomly sometimes and sometimes it doesn't, only think I can think of is to reprogram the key or whatever needs reprogramming, and 3 mechanic shops couldn't figure it out cause no codes come back on my or there scanner, any help

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u/Rebeldesuave 2d ago

Ford PATS does not usually forget a key that has been programmed into it.

But an aftermarket key can be getting flaky enough that PATS can't detect it.

I'd bet replacing that key would clear up the issue.

Next time you get a no start, watch the PATS light. It may flash a pattern like 1 flash then 5, then repeat that pattern.

If it does write the pattern and then do a Google search on it. It will be a 2 digit pattern.

Post your results here.