The check engine light comes on when the engine computer detects a malfunction and sets a trouble code.
You use a scan tool after repairing the failure that caused the code.
The 2006 Toyota Land-Cruiser has a V8 engine.
The 2006 Toyota Land-Cruiser has a 4.7 L base engine size.
With a scan tool.
I think it means you need to check your engine.
The 2006 Toyota Land-Cruiser's engine produces 275 hp @ 4800 rpm.
The 2006 Toyota Land-Cruiser's engine produces 332 ft-lbs. @ 3400 rpm.
that is not a question
It requires an engine scanner to do that.
Bill Greene
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
That REQUIRES an ENGINE SCANNER to do that.