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What is the normal data for the Passat 2.0 mass air flow sensor?

2 Answers
Jasper
09/01/25 6:24am
The normal intake flow value for the Passat is 2.0-4.5g/s. Additional information is as follows: 1. Passat: The Passat (PASSAT) is a mid-size sedan designed by Volkswagen AG in Germany. It is classified as a B-segment vehicle in Volkswagen's lineup. Since its debut in 1973, the Volkswagen Passat has set global automotive standards with its high safety ratings, classic design, and top-tier manufacturing quality over its 40+ years of production. 2. Origin: The name "Passat" designates this B-segment Volkswagen model in the European market. In North America, the first-generation Passat was originally called the Dasher (literally meaning "strong man" or "impactor"). The second generation was renamed Quantum/Santana. Subsequent third, fourth, and fifth-generation models reverted to the "Passat" naming convention, with numerical suffixes added to denote generational differences.
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McHenry
09/14/25 2:16am
I've been driving a Passat 2.0 for several years and regularly check the air flow data using an OBD tool. At idle, it normally stays stable between 2.5 to 4.5 grams per second. When accelerating, it can jump above 15 grams per second, and at full throttle, it can surge to over 30 grams per second. This data is crucial as it directly affects fuel consumption and engine performance. If the reading is too low, say below 2 grams per second, it might indicate a dirty sensor or an air leak, which needs cleaning. I make it a habit to scan with a diagnostic tool every six months to ensure everything stays within the normal range and avoid potential issues. On highways, the readings tend to be higher but shouldn't exceed 50 grams per second to be considered normal. Replacing the sensor with a new one can provide more accurate data. In short, remember this range—2 to 50 grams per second—and consistent readings within this range are a good sign.
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