Chosen Solution
How to fix error code P0507,P0171,P0304,P0300,P0101 for this car? Model:Gli; Maker:Volkswagen; Year:2006
Hey, John. These codes are likely related to the same issue. You likely have a gross vacuum leak, a failed Mass Airflow Sensor, or something related. With the car running, open the hood and listen for a sound of rushing air or hissing, and inspect all the hoses and boots for cracks/dry rot. Make sure that your Mass Airflow Sensor is plugged in. It’s a square shaped sensor mounted onto the big intake tube. If you don’t find any evidence of a vacuum leak let me know and I’ll guide you to from there on testing your MAF sensor. Hope it’s just a vacuum leak, good luck!
