i have some codes on my 2000 discovery 2 (177k) but i don't want to keep buying stuff to chase problems does anyone know how to read more into it than what my computer says. (also remember my break servo line broke and is on order) not sure if this will affect codes..

P1884 .. no clue on this one

p0154... O2 sensor front passenger side no activity bank 2 sensor 1

p0447 emissions circuit open.

p0102 mass air flow low input.

i just replaced
timing chain and seal, front main seal, good oil, new filter, dropped oil pan removed some sludge and replaced seal..

 

First, replace both front 02 sensors because of the 154 code and your high mileage, then buy a new MAF from British Parts of Utah, install, clear the code and the only one that should appear will be for the evap system and you may have to do a little testing on that one.