Here’s a good video on vacuum leak diagnosis. If it looks ok, than carb and choke cleaner can help. If you would like to try to find the vacuum leak yourself go ahead and perform a visual inspection and make sure that you don’t have a disconnected or broken vacuum hose. This is going to dramatically alter the reading at the mass airflow sensor gets and will trigger P1101.Ī mechanic would be able to do something called a smoke test, which would let them visually see where the intake is leaking from. A vacuum leak means that air will be getting in to the intake not through the throttle. Leaking Intake– If the intake seal on the Chevy Cruze has been damaged, there’ll be a vacuum leak. A word of caution, these sensors can be incredibly sensitive to the oil’s on skin so make sure to use caution and not touch the sensor element itself. If neither the engine wiring or the air filter seems to be a problem, then it’s going to be time to pull the mass airflow sensor and see if it is dirty. If enough air is not getting into the engine the mass airflow sensor is not going to get a proper reading, and P1101 will likely be thrown. Or if the filter looks very dirty go ahead and replace it. You’d be surprised, in the winter months a rodent can cause a lot of damage to a an engine in one night.Īir Filter– Pull your air filter and see if something has gotten in there. Make sure that the wiring doesn’t look broken or disconnected. We’ll list them in the most to least likely to have happened.Įngine Wiring– A good place to start is to do an inspection of the area around where the mass airflow sensor plugs into the intake. There are a number of issues that can cause the mass air flow sensor to fail the diagnostic. If the results of this test are out of range, than the P1101 trouble code is thrown. Whenever you start the vehicle, the mass airflow sensor does a self diagnostic. P1101 is one of the most common of the Chevy Cruze trouble codes.
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