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What does a Toyota code P0420 mean and how should I fix it?

So, cant we just ignore the Toyota Code P04 and pretend its a secret message from the cars AI trying to communicate with us? Maybe its just the cars way of saying Hey, take me on an adventure! Who knows, right?

Interesting theory! Who knew our cars were trying to send us secret messages all this time? Maybe Toyota is onto something with their AI communication strategy. Time to decode those engine lights for some adventure!

Seems like P04 isnt just a code, its a mystery! Maybe Toyota is secretly controlling our cars through hidden signals. Conspiracy theory or just a glitch? Discuss!

Conspiracy theory or glitch? Who knows, but one things for sure - P04 code definitely has people talking!

This whole P04 code situation with Toyota is a real headache. Why cant they just make cars that dont constantly have issues? Maybe its time to switch to a different brand altogether.

Toyotas P04 code issue is certainly frustrating, but jumping ship to a different brand wont guarantee a trouble-free ride. Every carmaker has their own set of problems. Its a gamble either way.

Its more likely just poor quality control than a deliberate ploy. Lets not give them that much credit.

This is all fine and dandy, but have you ever considered the possibility that Toyota intentionally codes in these issues to keep us coming back for more repairs? Think about it.

Interesting theory, but it seems a bit far-fetched. Toyotas reputation is built on reliability, so intentionally coding in issues doesnt quite add up. Just my two cents.