:confused I have a 2000 land rover discovery I took it to get it smog and they told me I had some codes to take care of P0734 for a Maf so I replaced the Maf. Also a P1590 for ABS so I replaced the Shuttle Valve. Now there is a P1884 now there telling me that is a factory code and I would have to take it to a dealer to fix it. What is P1884. and how do I fix it.