P1151 code CL fuel syst 1 faulty lack of HO2S21 switch

Question

I am guessing that the upstream heated 02 sensor needs to be changed however I do not know which bank this code is referring to. is fuel syst 1 referring to bank 1 or P 1151 bank 2 ?

Answer 1

Hi there,

This is refferring to bank 2 sensor 1. Bank 2 is the driver side of the engine and i agree with starting with the sensor. Unless you have a wiring problem it's the most likely issue.