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thstone · 09-24-2016, 08:26 PM

P1130 = Oxygen Sensing Adaptation, Idle Range, Bank 2 - Above Limit

A lean condition is when the air/fuel mixture is low on fuel. The MAF senses the amount of air going into the engine and the O2 sensors sense the combustion gases (air/fuel mixture) in the exhaust.

If the O2 sensors detect that the air/fuel mix is off-nominal, then the ECU tries to compensate for this by injecting a little more fuel to bring the mixture back to normal. However the ECU can only adjust a limited amount and the P1130 CEL code says that the ECU has reached the maximum limit for the amount of fuel that it can add and the mixture is still low on fuel.

This can be caused by a faulty MAF (which is providing a faulty air reading) or an air leak (which is allowing additional air into the system) or a faulty injector (which is injecting the incorrect amount of fuel).

This has nothing to do with the gas cap. Best thing to do is clear the code (as you already have) and see if it comes back.

09-24-2016, 08:26 PM	#7
thstone Certified Boxster Addict Join Date: Nov 2010 Location: Los Angeles Posts: 7,669	P1130 = Oxygen Sensing Adaptation, Idle Range, Bank 2 - Above Limit A lean condition is when the air/fuel mixture is low on fuel. The MAF senses the amount of air going into the engine and the O2 sensors sense the combustion gases (air/fuel mixture) in the exhaust. If the O2 sensors detect that the air/fuel mix is off-nominal, then the ECU tries to compensate for this by injecting a little more fuel to bring the mixture back to normal. However the ECU can only adjust a limited amount and the P1130 CEL code says that the ECU has reached the maximum limit for the amount of fuel that it can add and the mixture is still low on fuel. This can be caused by a faulty MAF (which is providing a faulty air reading) or an air leak (which is allowing additional air into the system) or a faulty injector (which is injecting the incorrect amount of fuel). This has nothing to do with the gas cap. Best thing to do is clear the code (as you already have) and see if it comes back. __________________ 1999 996 C2 - sold - bought back - sold for more 1997 Spec Boxster BSR #254 1979 911 SC POC Licensed DE/TT Instructor Last edited by thstone; 09-24-2016 at 08:30 PM.