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Also from Renntech:
P1128, P1130
Possible fault causes:
– Incorrect signal from MAF sensor
– Intake air system leaking
– Fuel pressure too low
– Volume supply of fuel pump too low
– Fuel injectors fouled
– Exhaust system leaking
A fouled MAF can certainly cause the car to run lean... or rich tripping these codes. It still might be a failed MAF but an intake air leak is most often the cause.
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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