1130 CEL - MAF or AOS?

[porsche99634]

another good test if you have access to scan data is if the fuel trim is at the lean stop it is usually a mass air flow sensor, if the fuel trim is at the rich stop it is usually the oil separator

[sb01box]

my statement "...is it possible that MAF replacement is only a temporary cure and not THE SOLUTION?" was directed at symptom where only P1130 was recorded.
By intermixing P1128/P1130 code (as a pair) into this thread, I may have unintentionally diverted the flow of the thread.

Tad

[impboy]

I'm not a 100% certain, but I think the possible faults for 1130 are the same for 1128. And thanks for the clarification!