08-05-2016, 09:58 PM
Join Date: Oct 2007
Location: FraserValley, BC, Canada
It is unfortunate that changing parts based on DTC's is not reliable and most often cost $$ that were not required.
If you have a LIVE DATA SCANNER, check the O2's for switching and range..
If that is not conclusive report the Fuel trims, STFT and LTFT at idle and 2000RPM, keep at the RPM for at least 30 sec so that the ECU settles..
Note the B1S2 will mimic the B1S1 (some what), Report findings..
92 Ford Explorer, 450k
97 Ford Explorer, 400k
99 Tracker, 4dr, 4x4, 2L DOHC, auto 265k