Question about 2004 Oldsmobile Alero

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Having trouble starting car..when it sits after an hour the car starts..I have replaced the computer system b c they thought it was the anti theft locking me out from starting it now it wont start at all unless it sits for an hour

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You could have a stsrter that gets locked up when it gets hot. When it cools it will operate OK

Posted on Oct 11, 2010

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2 Answers

Car cranks but wont start after sitting 3 months


Sometimes if it set too long the gas went bad. You may have to drain the gas and the put fresh gas in.

Mar 01, 2014 | Ford Taurus Cars & Trucks

1 Answer

06 trailblazer trouble with anti theft system, I think, starts right up then other times the anti theft light comes on and it won't start. can try it 2-4 hours later and it starts right up????


The first thing to do get it checked for DTC'S - diagnostic trouble codes . Not at auto zone or any other parts store , you want to have full scan of all the modules on the car. Don't know how much you know about automotive electronics , computer controlled systems etc.... Your vehicle has at least 10 modules (computers ) on board , there all talk to each other on a serial data network . C.A.N - controller area network . Or in the case of GM it has it's own . GMLAN -
How to Diagnose Controller Area Network CAN When you turn that ignition switch to start it is an input to the computer ,be it the PCM or BCM ..

Jul 01, 2017 | 2004 Chevrolet TrailBlazer

2 Answers

My car won't start, have had no problems it was running fine, pulled into the driveway shut it off, then an hour later it would not start. My anti theft light flashes excessively fast when I put the...


Absolutely! If the Passive Anti-Theft System (PATS) "thinks" you are trying to steal the car, it is SUPPOSED to keep it from starting. The problem is that the PATS thinks you are a car theif when you are not.
Below is a table straight out of the service manual for your vehicle. Please note that the FIRST action that must be taken for any PATS system malfunction is to scan the computer system for fault codes.


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Aug 27, 2011 | 1997 Mercury Sable

1 Answer

2003 hyundai xg350. Starts and runs, then cuts off.


Ita an imobilizer fault.Try changing the key fob battery first.Before having it reprogamed.

Jul 07, 2009 | Hyundai Motor 2003 XG350

2 Answers

'97 Cadllac Deville Concours reading "Anti Theft System Problem"


I had the same problem. trying to save money i took it to several auto places who thought they could fix it..... after a lot of money and my 800.00 after market alarm was taken off i had it took to the dealer . They fix it in two hours they put in new switch and key haven't had any problems sence.

Apr 13, 2009 | 1997 Cadillac DeVille

1 Answer

Trouble starting once in awhile


it does sound like the anti-theft system. There are only 2 ways to bypass your problem. 1) disconnect the anti-theft system which runs into your ignition, cut the wires to the system and join them back together without hooking it back up to the anti-theft. 2) Bring it back to the dealer so that they can replace your anti-theft sensor. The part is rather cheap but the labor is the killer.

Apr 11, 2009 | 1997 Pontiac Grand Am

3 Answers

Anti theft system disabled start on car.


Did you replace the ignition lock cylinder? Are you using the original keys?

Apr 01, 2009 | 1989 Cadillac Eldorado

2 Answers

Anti theft light comes on when driving


no cutoff switch!! try this turn key to on, do not start car. let sit for about 30 minutes, after 30 minutes, turn key off. wait 15 seconds and try to start car. this should reset anti theft system.

Feb 20, 2009 | 2000 Chevrolet Malibu

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Anti-theft system seems to have been activated?


Some months ago I began starting the engine of my 2001 Chrysler 300M but turned it of before it really started "was sloppy with the key". The anti-theft system went on for some unknown reason. I disarmed it by disconnecting one of the battery connections under the hood with a wrench. I connected it again, the anti-theft system was off but the battery was dead. Battery was OK after recharging, I have had no trouble since then.

Jan 20, 2009 | 1999 Chrysler 300M

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