If that's the shift lock control switch, that just keeps you from removing the key unless the shifter is in the Park position. It doesn't affect starting at all.
The switch that allows the starter solenoid to get power is the Neutral Start Switch, PN 84540-30270
You'll want to adjust, clean and test before just replacing... it is generally a reliable part.
-Charlie
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'99 4Runner SR5 Auto -
4WD swapped
'89 Camry Alltrac LE 3S-GTE 5spd
'17 Chevy Volt Premier
'16 Honda Odyssey Elite
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