e39 BMW Check Engine Code P0021

After feeling a misfire and getting a check engine light on my 2003 BMW 540, I investigate what codes are stored in the computer. Code P0021 was the code.

Newer version of the scan tool from Harbor Freight: https://www.harborfreight.com/zr15s-o...

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Disclaimer: I'm not a mechanic, this video is for entertainment purposes only.