Take it to the dealer, its not normal. You could also check to see if the barend weight is touching against the throttle tube.
TPS does not come into play during idle.Makes a lot of sense. That would explain why the throttle is probably shutting but the engine keeps running. Still, I'd think the TPS would show idle position and a code would get thrown.
Or possibly the servo motor for the idle control sticking.No, not normal - nor widely reported as a fault.
There is probably an air leak in the intake system somewhere.
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This is a bit of a "misnomer". ECU doesn't get "idle position" from the TPS - it gets "throttle position". If it detects fully closed throttle position, the ECU itself sets idle.How does the ECU know when the throttle is at idle position?