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I just got these codes this morning. I've been having problems with my emission system lately and I've already changed the air injection valves and pump. This is the first time I've gotten these codes and everything I'm reading online says I need to replace the vapor canister or charcoal...

I have a 2012 tacoma, v6 4wd trd sport. I noticed a rattling or knocking sound when accelerating around 1500 to 2000 rpm. If I put premium gas in it goes away. I changed the spark plugs and that quieted the sound but it's still there. I hate to have to pay for premium gas every time so has...