Why does the 4L light flashing on and off?

Asked by Nov 22, 2015 at 08:36 AM about the 2013 Toyota Tundra Grade Double Cab 5.7L 4WD

Question type: Maintenance & Repair

The engine light, track off and 4L light come on every time I start the truck.
The 4L light flashes on and off.

1 Answer

94,815

If it continues to flash after a few seconds it is indiacating that there is a problem in the 4X4 system and it needs to be checked out. It is normal for the other light to come on during a start up as they are performing a systems check just as long as they go out after the check is complete. HTH

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