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Discussion Starter · #1 ·
Probably not a lot of 2019 hybrids with as many miles as mine but I just had the spark plugs swapped out, cars engine light came on yesterday and had the code P0420.

I keep up the regular maintenance and actually had the spark plugs on order from earlier on in the week so the timing worked out.

Make sure your changing your clutch fluid regularly along with the transmission fluid as listed.

no big expenses yet.
 

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Do you have photos of the plug electrodes or description of how they were when swapped?
 
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