P0102 on Volkswagen
Mass or Volume Air Flow Sensor Circuit Low Input
P0102 on Volkswagen vehicles indicates mass or volume air flow sensor circuit low input. Au7o has documented this code across 1 Volkswagen model — most commonly on Golf. P0102 is a generic OBD-II code meaning the engine computer detected an abnormally low voltage or signal from the Mass Air Flow (MAF) sensor circuit. The MAF sensor measures how much air is entering the engine so the computer can deliver the correct amount of fuel. A low signal tells the computer it is reading less airflow than is actually present, which can cause poor running, stalling, or reduced power. While not usually an emergency, it can affect drivability and fuel economy and should be addressed. Typical repair costs on Volkswagen range from $150 to $1,400, depending on the specific model and root cause.
Common Causes of P0102
- •Dirty or contaminated MAF sensor element
- •Faulty MAF sensor
- •Damaged, corroded, or loose MAF connector/wiring
- •Open or short to ground in the signal or power circuit
- •Dirty or restricted air filter / intake blockage
- •Vacuum or intake air leak after the sensor
- •Poor power or ground supply to the sensor
P0102 on Volkswagen by Model
Volkswagen Golf(1 issue)
- 1.9 TDI VNT turbo actuator sticking and MAF sensor failure (power loss / limp mode)1993-1999
On the 1.9 TDI (engine codes 1Z, AHU), two age/mileage faults dominate. First, EGR soot coats the variable-nozzle turbine (VNT) vanes and the vacuum actuator seizes, so the vanes jam in one position, causing either underboost/power loss or overboost that trips limp mode; short-trip city cars are worst affected. Second, the hot-film mass airflow (MAF) sensor drifts or fails from oil/soot fouling, causing loss of power, poor throttle response, black smoke and hesitation. Both are extremely common on high-mileage TDIs and are interdependent (a bad N75 can make a good MAF read low).
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View P0102 across all makes →Frequently Asked Questions
What does P0102 mean on Volkswagen?▼
P0102 stands for "Mass or Volume Air Flow Sensor Circuit Low Input." P0102 is a generic OBD-II code meaning the engine computer detected an abnormally low voltage or signal from the Mass Air Flow (MAF) sensor circuit. The MAF sensor measures how much air is entering the engine so the computer can deliver the correct amount of fuel. A low signal tells the computer it is reading less airflow than is actually present, which can cause poor running, stalling, or reduced power. While not usually an emergency, it can affect drivability and fuel economy and should be addressed. On Volkswagen specifically, this code is documented across 1 model.
What causes P0102 on Volkswagen vehicles?▼
Common causes on Volkswagen: Dirty or contaminated MAF sensor element, Faulty MAF sensor, Damaged, corroded, or loose MAF connector/wiring, Open or short to ground in the signal or power circuit, Dirty or restricted air filter / intake blockage. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0102 on a Volkswagen?▼
Repair costs on Volkswagen range from $150 to $1,400, depending on the specific model and root cause.
Which Volkswagen models have P0102 documented?▼
Au7o has documented P0102 on 1 Volkswagen model: Golf.