also have oxygen sensor prolem codes P0158 and P0159. ( which refer to rear left bank2 oxygen sensor).

A dealer told me that I may need to change both the sensors and
REPROGRAM ECM.

Does anybody have any idea ?

Thanks

-Mahendra Kothari

 

Change the sensors then reset your ECU (for info on how to do this, check the stickies). Reprogramming the ECU shouldn't be necessary unless you're remapping the A/F mixture like what Technosquare and JWT do for better performance.

~THT