Engine codes P117B & P0174 2019 tacoma

Was driving to the store today and this code popped up when I turned into grab coffee.

I have a 2019 manual 3.5l with 25,000 miles. Just trying to see what could cause this code.

 

Cylinder A/F Imbalance Monitoring Bank 2

System Too Lean Bank 2


5 second search found that. This your first day on-line?

 

Smells like a fuel pump recall

 

Wow, put down the fucking coffee man.. geez!

 

Yeah, I actually meant to put that in, just wanted to see what others experienced this

 

Go find a safe space, FL.

 

Huh, maybe it's the bottle you need to put down.

 

I checked for recalls for the truck but didn't find anything

 

Is the truck running okay? From what I’ve seen around here and the internet means when that code appears it’s normally a compression issue inside the motor. Some people had valve issues.. can’t remember if it was burnt valves or valve seats not sealing. Which kinda go hand in hand.

 

@Drtbker ,quick Google says engine Running lean. Any mods ? https://www.700r4transmissionhq.com/toyota-tacoma-p0171-p0174/

 

Its the fuel pump. I had my fuel pump replaced last week and all my issues went away. I had issues with it stalling right after starting

 

only thing I have is the TRD exhaust. trying to figure out why it threw both codes before I take it in to the dealership.

 

Did you have the recall for the truck? I checked for recalls and it didn't show anything with my vin.

 

Truck seems to be running fine. did not notice anything when the check engine light came on.

 

I think every 2019 is affected by it

 

Cool, ill take it in. just wanted to know what I was looking at so I understand before taking it in.

 

fuel pressure loss would normally effect both cylinder banks. If only one bank is setting a lean code it could be any cylinder on that bank. PCM's monitor the HEGO sensors to set the fuel trims. A lean cylinder would put more air by the HEGO. I have seen a bug/debris go through a MAF sensor causing weird lean codes. You could clear the code and see if it comes back. That way when you go to the Dealer you know its a verifiable issue. Good Luck

 

Good deal. Yeah I’d have someone look at it with a scan tool with live data and monitor short term fuel trim on that bank. I’ve had a Toyota tech tell me straight out that the cylinder imbalance issue normally leads to heads being pulled but that’s when they have a misfire. Vacuum leak would be the thing I’d be starting to look for at the moment.