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IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

P2009 runner gear retainer nut

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Old May 26, 2026 | 12:50 PM
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IS250_6MT
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Default P2009 runner gear retainer nut

My 07 IS250 6MT has over 280K miles, and the engine has been running poorly with a few CEL codes. I do not drive my IS250 daily, so have been taking my sweet time before fixing the problems. Over the Memorial Day weekend, I was able to clear one CEL code (P2241) by replacing the Bank 2 Sensor 1 air fuel sensor. Now, the next code that I need to tackle in the future is P2009. I saw this thread (https://www.clublexus.com/forums/is-...-solution.html) which is quite helpful, and I suspect that the intake manifold runner gear's retainer nut is loose which is causing the P2009 code.
It is quite annoying that I have to open the upper intake manifold plenum again to access the lower intake manifold runner gear motor since I did the spark plug replacement last year.
For those who have done this fix, do you have any tips to share?
My understanding is that I need to remove the lower intake manifold runner completely to gain access to the motor to fix the loose nut. Do I need any special tools to remove the lower intake manifold? Or is it fairly straightforward to remove the lower intake manifold runner?

Last edited by IS250_6MT; May 26, 2026 at 02:31 PM.
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