What does it mean P1101 code on my code reader?

P1101 is a code that indicates the engine control module (ECM) has detected an abnormal reading in the mass airflow sensor (MAF) circuit. This can be caused by a number of things, including a dirty or faulty MAF sensor, an obstruction in the MAF sensor circuit, or a problem with the ECM itself. In most cases, cleaning or replacing the MAF sensor will fix the problem. If the problem persists, it may be necessary to have the ECM inspected or replaced.

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