P219b code

Hey guys I just purchased my 2012 tacoma 4.0. 110,000 miles on it. After about 1 week of owning it check engine and Trac off came on at the same time went to autozone and pulled the code p219b- bank 2 fuel/air ratio imbalance. Took negative off and put it back on to reset code and so far it hasn't came back on. Any ideas as to what might have happen? Some valve stuck open or something? Something to worry about? Any help would be greatly appreciated. Thank you.

 

Welcome, to start I always suggest cleaning the throttle plate and air flow meter on these trucks.

Also they have frequent spark plug replacement intervals so check when it was done last.

Both of these are just starting points, work your way from there.

 

Replace the o2 sensors with Denso brand sensors, or dealer sensors. You have sensors before and after the Cats, before is the air/fuel ratio sensors, the after's are actually o2 sensors. With that many miles on your truck, it is time to replace them.

 

Awesome thanks for the quick reply. I will try those things as soon as I get off from work!

 

I've got over 250k on mine. I had one code, 420 I believe and traced that down to the cat y pipe gasket. I imagine the fuel used had a lot to do with that too. I always go for a branded gas. Never a no name or Costco/ BJs.