Codes 12-01, what exactly is?

Car Won't Start Because of Anti-Theft System ... - RepairPal

repairpal.com > Problems > Oldsmobile > 88

Car Won't Start and Security Light is On on Oldsmobile 88 ... key turns over enginebut fails to start some times..security system keeps the fuel injectors from ...

Car Won't Start Because of Anti-Theft System ... - RepairPal

repairpal.com > Problems > Buick > LeSabre

Car Won't Start and Security Light is On on Buick LeSabre. Problems with the ... 1998 Buick LeSabreVisitor. Turn key on every thing come on but won't turn over.

Car Won't Start Because of Anti-Theft System ... - RepairPal

repairpal.com > Problems > Pontiac > Bonneville

Replaced trans, engine, PCM and bcm, now starter diabled- theft flashes on service ...1995 Bonneville car turns over but wont fire an security light is flashing car ...

GM Passlock Security Light Issues - RepairPal

if a mercedes

Check the Fuel Pump Relay. behind the battery next to the OVP Over Voltage Protection Relay. They do fail. Occasionally the engine will not start when hot. This becomes more frequent until you are left stranded. If you are comfortable with jumping two terminals you can jump terminals 7 & 8 test the relay. if the car starts your Fuel pump relay is bad.

many possible causes. sounds all too much like a crank sensor failing. when it dies, does it act like you shut key off, (instant stall)? or does it sputter and cough, then stall out? seen this same situation and problem many times in my shop and a cranksensor fail can be hard to catch when it fails. most likely cause.

I suggest scanned the module in order to know exactly what is the fault code stored there. Note this code and send us for other details.

Manifold Absolute Pressure sensor you might be onto something I would try and replace the sensor

have a mechanic scan for computer codes this will put you in a better direction than just changing parts although it wont tell you the exact problem

I just had this on my car too. Turn the key to "on" without starting the engine. Look at the display and see if the Anit-Theft light is blinking. If it is, you need to keep your key in the on position for about 15 minutes until the light stops blinking. Start the car when the light starts blinking.

You could try resetting the computer. The car maybe in lockout mode. Try turning your car over….leave the ignition on. Wait exactly 10 min. Then try turning over again….again leave the key on. Wait exactly 10 min and do it a third time….this time the car should start…maybe run a lil rough while it relearns the processes of your vehicle again. It is important to wait the exact 10 min each time. You will probably need a battery charger or a set of jumper cables because if your car goes low during this process it will not work. Good luck and I hope this works.

When it dies..check for spark. You could have a component in the ignition system failing when the car gets warm.

If you don't have spark then you might need a new ignition module. The distributor cap and rotor should be checked for traces of carbon. This would be evidence of a leaking cap.

If you get check engine codes then you do have some sensors going out of range or failing all together. P0446 is an evap code right?
Make sure your fuel cap isnt plugged up and all your evap lines are ok.

No spark is uasually caused by a faulty coil or the trigger unit,both are inside the distributor. Get a used distributor fron a scrap yard (about $4o) and replace yours.Remove the dis.cap and turn the engine until the rotor is pointing to fire # 1 cyclinder,and mark the exact position of the base before removing from the block." Do not turn the engine" Install the other Dist. with the base in exactly the same position and the rotor pointing exactly to # 1 cyclinder. Note. Failing to install the other dist.exactly the way you took the first one out will throw the timing out!!!!!
Be doing all of this be sure there is no spark.
Naz