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P1128 Oxygen Sensing Adaptation, Idle Range, Bank 1 – Above Limit
P1130 Oxygen Sensing Adaptation, Idle Range, Bank 2 – Above Limit
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
Bottom Line - Your car is running lean. In most cases we are looking at an intake air leak or a bad MAF. If the MAF is bad then it is sending the wrong signal to the DME. Driving with these fault codes over time could damage your cats or worse.
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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