I have the code P219A for a air fuel ratio sensor. Mileage is at 152k, changed spark plugs and cylinder 1 coil park, atf change and coolant change. Do you think its the sensor that is going out or the egr and intake needs to be clean or both? Thank you
I would check both, but verifying the EGR isn’t plugged and checking for signs of a head gasket failure trumps the intake for right now.
thank you for your inputs, i will check it out. the light disappeared on its own after two days. gonna wait and see what happens
The air fuel ratio sensor was pretty expensive about $150, so I decided to check out the egr and intake first. Remove and found out it was clogged. Cleaned the tube and manifold and now drives better and check engine light is gone. Looks like clogged intake and egr will cause the air fuel ratio sensor engine code to come on.
Sorry to revive this thread, but perhaps all is well still?? I just got this code on my 260k mile 15 gen 3. BTW, mine is not a plug in but I believe it doesn't matter as the ICE is the same. I have no misfire codes just the p219A. I bought the car a week ago and when I initially scanned it it had P0300 P0302 p03 and P0304 in the History but not current or pending. It had the 12v battery replaced right before I bought it so it caused a CEL clear due to that but so far those codes did not appear instead I got a P0A80 code for the hybrid system 2 days ago but I cleared it and hasnt come back and today while driving, this P219A came on, a first. I had never seen that code on any car before until now. Anyhow, I do have a slight “flutter” when accelerating at low speeds but still runs decent and I also verified NO coolant loss.. I also have not driven it enough to say the MPG is bad and at highway speeds, it's pretty smooth. The cat converter, upstream and downstream sensors were all replaced by Toyota 100 miles before I bought the car so I doubt an OEM air/fuel, oxygen sensor would go bad that fast. The one thing I am getting ready to do is a major tune up (spark plugs, air filters, EGR and affiliated items cleaning) so funny to say is I hope I do find the TB ports and EGR dirty as I read was your case above. Finally I opted for a 2015 model as I heard they revised and corrected the HG / EGR issues by updating better HG material and other significant fixes so I will see if perhaps the EGR/ TB carbon clogging caught up with this one due to its high miles. Any word on how it worked out after the EGR / TB cleaning after all these years?
