On my Tundra the 4 LO is flashing and the VSC and Check Engine lights are on solid. What is this telling me?

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The warning lights will come on together typically when there is a fault in the engine system .this occurs because much of the information is shared across these systems to allow proper function .the first step here is to get the car plugged into a diagnostic tool and read faults to narrow down the cause

Autozone can do this for free.

They have a computer they bring out to your truck and plug into and runs a free diagnostic to find the problem for free.

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