As a first step, clear the codes. Then let the car go through several drive cycles - several starts and restarts plus a mix of street and highway like driving - until its ready to monitor the O2 system again. If the codes don't come back, then they were a false alarm. If they do come back, then further investigation needed.
Replacing the O2 sensors is not the first way to go. IIRC your Durametric might be able to test their voltages to see if they are working in range.
try cleaning the MAF sensor.
I've had the same codes come up.
MAF and throttle body cleaning did the job for2 years.
second time cleaning the MAF lasted a year.
replaced the MAF and approaching 1-1/2 years without these codes.
have 130K miles on my daily drive '01 2.7
P1128 & P1130 generally means your O2 sensors are working perfectly so don't change em. Search is your friend here to gain a better understanding of the problem:
Lil Red
2009 Porsche Cayman 2.9L
Hybrid Mode
