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The "mass or volume airflow a circuit low" code that you're getting indicates a problem with the mass air flow (MAF) sensor or the air flow meter. This sensor is responsible for measuring the amount of air entering the engine so that the engine control unit (ECU) can determine the proper fuel mixture. If the MAF sensor or air flow meter is malfunctioning, it can cause the engine to run poorly when you turn on the lights or the radio, as it's drawing more power from the alternator.To diagnose the issue, you'll need to have the car scanned with a diagnostic tool to retrieve the trouble code stored in the engine control module. This will help to determine which component is causing the issue, the MAF sensor or air flow meter. If it's found that the MAF sensor is at fault, you may need to have it replaced. If the air flow meter is the problem, it may need to be cleaned or replaced, depending on the severity of the issue.