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Carhelp4u
Carhelp4u, ASE CERTIFIED TECH
Category: Chevy
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Experience:  ASE CERTIFICATION
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2003 chevy malibu: wont start..replaced fuel pump,filter..shuts

Resolved Question:

2003 chevy malibu wont start, replaced fuel pump,filter,&relay.car starts then shuts off immediately
Submitted: 5 years ago.
Category: Chevy
Expert:  Carhelp4u replied 5 years ago.
With the key in the on position do you have a security indicator showing on the instrument panel?
Customer: replied 5 years ago.
theft system light blinks nonstop
Expert:  Carhelp4u replied 5 years ago.

This is not an uncommon problem in this model. Normally this is caused by a faulty passlock sensor within the ignition cylinder assembly. Here is a relearn procedure that normally fixes this problem for a bit.

  • Turn ON the ignition, with the engine OFF.
  • Attempt to start the engine, then release the key to ON, vehicle will not start.
  • Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
  • Turn OFF the ignition, and wait 5 seconds.
  • The vehicle is now ready to relearn the PasslockTM Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK.

    Important: The vehicle learns the PasslockTM Sensor Data Code and/or password XXXXX the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

  • Start the engine, the vehicle has now learned the PasslockTM Sensor Data Code and/or password.
  • If this does not work, you will need a scan tool that can read body failure codes to verify the actual failure that your car is having. I would bet 90% or better are caused by the passlock sensor as I have mentioned. Good luck!

    Carhelp4u, ASE CERTIFIED TECH
    Category: Chevy
    Satisfied Customers: 5203
    Experience: ASE CERTIFICATION
    Carhelp4u and 2 other Chevy Specialists are ready to help you

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