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Hello and Welcome to justanswer..
The code you have P2138 comes up as Faulty Throttle Switch position sensor and / or wiring.
So..its likely you will need a new "throttle position switch/sensor" - as these are a common fault.... Its always worth checking the wiring and the connectors first though - but in my experience , with these , its usually the sensor itself that is faulty.
Once you have the new one in your possession - you will see exactly what it looks like and how it fits ;))
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Kind Rgds,.... MIKE
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