1998 Chevy Silverado code p1631

1998 CHEVROLET SILVERADO
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TONY SCHULZ
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  • 2 POSTS
Electrical problem
1998 Chevy Silverado V8 Four Wheel Drive Automatic

how to fix code p1631 theft system password incorrect
Nov 1, 2009 at 11:18 AM
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BRIAN 1
  • ✓ASE Certified Mechanic
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  • ASE Certified Mechanic
try this relearn,Attempt to start the vehicle (the vehicle will start and stall), after the engine has stalled, leave the ignition ON for 10 minutes (the security light will remain ON for 10 minutes and then go OFF).
After the Security lamp turns OFF, turn the ignition OFF for 30 seconds.
Again, attempt to start the vehicle (the vehicle will start and stall), after the engine has stalled, leave the ignition ON for 10 minutes (the security light will remain ON for 10 minutes and then go OFF).
After the Security lamp turns OFF, turn the ignition OFF for 30 seconds.
Again, attempt to start the vehicle (the vehicle will start and stall), after the engine has stalled, leave the ignition ON for 10 minutes (the security light will remain ON for 10 minutes and then go OFF) or until DTC P1630 sets.
Turn the ignition OFF for 30 seconds.
Turn the ignition ON and wait 30 seconds.
Attempt to start the engine.post back with what you find.
Nov 1, 2009 at 7:29 PM
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