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Replacing the intake manifold gasket on a 2004 Toyota Corolla. Trying to clear an on-going intermittent P0133 error that occurs after a cold soak. Recently also got a P0171 (Too lean) error which lead me to a TSB (Technical service bulletin) EG045-07 which says that the original Toyota gasket frequently fails.
As a result the old black gasket has been replaced by a new black gasket. Unfortunately the old black gaskets are still on sale on ebay and Amazon (don’t ask how I know this). Get the new gasket.
Old 17171-0D020 (black)
New 17171-22060 (orange)
After driving for a few weeks, including cold starts, this does seem to have fixed the problem.