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2003 Toyota Tacoma - OBD Codes P0420, P0441, and P0446

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Hello all! I recently bought a 2003 Toyota Tacoma double cab 4x4 with an automatic transmission and 193,000 miles used from an auto auction. I got it and I noticed that it had a check engine light on. I plugged in an OBDII scanner and it showed the following codes:

P0420 - Catalyst System Efficiency Below Threshold Bank 1

P0441 - Evaporative Emission System Incorrect Purge Flow

P0446 - Evaporative Emission System Vent Control Circuit

The only mod on the truck appears to be an AEM air intake (AEM-21-8402DP) Can anyone help me out? Thank you.

4 Answers
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It would usually be a bad cat. 

But with those other codes, I am not 100% certain. So many emissions things to deal with. The problem ccoild be upstream from the cat. Or downstream from the EVAP codes. 

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this is why you inspect and scan codes BEFORE paying money.

https://www.youtube.com/c/ScottyKilmermechanic/search?query=p0420

https://www.youtube.com/c/ScottyKilmermechanic/search?query=evap

 

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Topic starter

@MoutanManJoe Absolutely! I got the car from a Copart auction about 400 miles away though so unfortunately that wasn't an option... It was a very low price however, so I did expect for there to be something wrong with it, and, well, I was right, haha! Thank you for your reply!

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@kaizen Thank you for your response! Will look into that.

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