Error codes P1128 and PO411 01 NB

fr_holley · #1 (**permalink**) 11-15-2008, 05:07 PM

01 NB with 43,000 miles. Keep getting error codes. It started with PO411, "Secondary air system incorrect flow" After resetting and taking the car on a 4 hour drive it seemed OK. Now the code is back with additional code P1128 "Manufacturer controlled fuel and air mixture". These both have to be associated. When this happened to our 99 NB it was the MAF sensor but not 2 error codes. That was an easy fix and per the dealer very common. Anyone had any experience with this issue?
Thanks
Fred

fr_holley · #2 (**permalink**) 11-28-2008, 06:00 PM

Replaced MAF sensor $214, Ouch drove 200 miles and the code is back. Now checking secondary air pump. Will post results.
Fred

fr_holley · #3 (**permalink**) 11-28-2008, 07:18 PM

Replaced vac hose for secondary air pump, it was broken at the switch. will see if this fixes it and post the results.
Fred