Security light flashes engine will not start

2007 ISUZU D-MAX
180,000 MILES • 3.5L • 6 CYL • 2WD • AUTOMATIC
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GIUSEPPE MANCUSO
  • MEMBER
  • 2 POSTS
After turn switch on, security light flashes engine cranks, starts, and stops immediately.
Dec 5, 2018 at 12:57 PM
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STEVE W.
  • ✓ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
The flashing security light means the system does not recognize the key you are using. Try a different key that has worked in that truck before. If neither key works then it is likely that there is a problem in the ignition switch, body control module or the wiring between them. To narrow down which item it is you need to use a dealer level scan tool to watch which components are being activated when you turn the key on. Then once the faulty part is replaced you will need to re-program the system to recognize the keys again.
Dec 7, 2018 at 11:45 PM
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