Engine Code P015B

dlgkswh88

Hello Everyone,

So on the way home last night, check engine light came on, which the code came out to be:

P015B - Air fuel ratio (A/F) sensor 1 (bank 1) circuit delayed response

Couldn't find much information on this code on 370Z except the above.

Has anyone experienced this code before?

My first assumption is to clean the MAF sensor and throttle body.
(The reason being, when I got the car as used, air filters were extremely dirty which I changed to new 'dry' filters from aFe, but did not clean MAF sensor and throttle body at the time)

It is 2018 370Z and only has about 15K miles on it so doubting cats or O2 are already going bad.
(Car is completely stock except for the new dry air filters and short tail axle-back exhaust from AAM. Not even sure if these two mods will cause a big difference in air/fuel ratio)

Car didn't feel any slower nor having erratic moves with RPM.

I know I could take it to dealer, but trying to see what could be the actual issue and see if can be simply fixed.
(Just hate taking the car to dealership, and most of the time forum is more beneficial)

Thank you all in advance!

JARblue

Cleaning the TBs and MAFs and clearing the code sounds like a good start. Then wait to see if the code comes back. Common symptom of dirty MAFs and/or TBs is lower RPM idle or RPM-hunting idle.

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