Question about 2003 Oldsmobile Alero

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2003 Oldsmobile Alero, the engine turns over but the car won't start.

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Please see my notes at http://www.fixya.com/cars/r5821173-doesnt_car_start_gasoline_engines and let me know if you have questions

Posted on Sep 15, 2010

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6ya6ya
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Posted on Jan 02, 2017

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1 Answer

2003 Oldsmobile Alero won't start


Chances are you got water inside the fuse box or a wiring harness connection.
You may have to start tracing circuits to find out what is getting power and what is not.

Jan 10, 2013 | 2003 Oldsmobile Alero

1 Answer

2003 Alero, heater won't shut off? Fan shuts off but can't turn heater off.


Faulty heater control valve.Its located under the hood on the passenger side in front of the firewall.

Oct 29, 2012 | 2003 Oldsmobile Alero

1 Answer

When i go to start my 2004 Alero all the gauge lights come on but it won't start. The starter is still good. What could the problem be? Someone suggested that it was the neutral safety switch.


look for security light when you turn on key if it lights and doesn't go off leave key on for ten minutes then turn key off and then try to start

Oct 16, 2012 | 2003 Oldsmobile Alero

1 Answer

2003 alero steering won't lock and nothing happens when you turn the key in the ignition


If the security light keeps flashing,you might as well do a reset.
Be sure to turn off all the accesories including the radio before you start the process.
Insert the key to the ignition switch and turn the key to ON position without starting the car.
leave it ON until the flashing light (security) stops.It will take approximately 15 to 20 minutes.
As soon the flashing stop,turn the key to OFF
position and start the cart.
Hope this help.

Jul 23, 2011 | 2003 Oldsmobile Alero

1 Answer

Car won't start


start by checking for spark, then check fuel pressure and injector signal, so you need a spark tester and noid light

May 03, 2010 | 2003 Oldsmobile Alero

1 Answer

Shutting down


Try replacing the air filter.

Dec 21, 2009 | 2003 Oldsmobile Alero

1 Answer

We need to reset the computer on a 2003 Oldsmobile Alero


HI there if the scan tool you are using will not reprogram the theft module the try the 10 min relearn

  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to start the engine, then release the key to ON (vehicle will not start).
  3. Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
  4. Turn OFF the ignition, and wait 5 seconds.
  5. The vehicle is now ready to relearn the Passlock™ Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK. Important: The vehicle learns the Passlock™ Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
  6. Start the engine. The vehicle has now learned the Passlock™ Sensor Data Code and/or password.
  7. With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles

Apr 10, 2009 | 2003 Oldsmobile Alero

1 Answer

2003 Oldsmobile Alero Thermostat/Fan Trouble


they should turn on at about 213 orbetween 200 and 215 dont let it go over 230 if so please turn off

Apr 09, 2009 | 2003 Oldsmobile Alero

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