P0102 on Audi: Causes, Symptoms and Fix Cost
Quick Answer
Safe to drive (short-term)
P0102 on a Audi means the mass air flow sensor is reporting a voltage or frequency below the expected idle minimum. The ECU thinks almost no air is entering the engine, so it cuts fuel injection accordingly. The root cause is usually a contaminated MAF element, a major air leak after the sensor, or a wiring fault. VW, Audi, Skoda and SEAT apps often show this code as P010200; the last two digits are a failure-type byte.
- Severity
- Moderate · Fuel System
- Typical repair cost, all makes
- €8-€350
Connect a standard OBD2 adapter (Bluetooth LE on iPhone) to your Audi and Skanyx tells you what P0102 means on that engine, whether it is safe to keep driving, and what the fix should cost. Free on iPhone and Android.
Get Skanyx freeWhat does P0102 mean on a Audi?
The Quick Answer above is the generic definition. What follows is the model-specific detail for the Audi models that log P0102.
Audi A4
2008-2024
The B8 A4 2.0 TFSI uses the same Bosch hot-film MAF design as the Golf, and the element loses sensitivity when carbon and oil contaminate it. Long-term fuel trims, readable with any OBD2 reader, often drift positive (lean correction) as the reading falls. Inspect the crankcase ventilation (PCV) diaphragm at the same time, since a leaking PCV adds oil mist that can foul a replacement sensor.
What causes P0102 on a Audi?
Beyond the generic causes listed on the main P0102 page, these are the patterns noted for Audi models:
Oil and carbon contamination of the MAF element on the B8 2.0 TFSI
: Audi A4
Leaking PCV diaphragm feeding oil mist that fouls replacement sensors
: Audi A4
How to diagnose P0102 on a Audi with OBD2
- Read live data and check MAF reading at idle. A 4-cylinder should show 2-7 g/s. Below 1 g/s is consistent with P0102
- Inspect the air filter and replace if dirty (a clogged filter pushes MAF readings low)
- Inspect the intake tract from the MAF housing to the throttle body or turbo for cracks, loose clamps, or disconnected hoses
- Clean the MAF sensor using a dedicated MAF cleaner spray (never use brake cleaner or carb cleaner)
- If readings remain low after cleaning and the intake is sealed, unplug the MAF and test drive. If the car runs better, replace the sensor
How much does P0102 cost to fix on a Audi? (EUR)
Estimated repair costs for P0102 in EUR, compiled across makes. Expect Audi parts and labour towards the upper end of each range.
| Repair | Parts Cost | Labor Cost | Total Estimate | DIY Difficulty |
|---|---|---|---|---|
| Clean MAF sensor with MAF-specific cleaner | €8–€20 | €0–€60 | €8–€80 | Easy |
| Replace MAF sensor | €40–€250 | €30–€80 | €70–€330 | Easy |
| Repair intake boot or charge pipe air leak | €20–€150 | €60–€200 | €80–€350 | Moderate |
Prices estimated as of October 2026. Costs vary by region, vehicle, and shop.
Codes related to P0102
These codes are often seen alongside P0102 or point to related issues, on any make:
Looking for the full P0102 reference (all makes, full diagnosis flow, complete repair cost matrix)? See the main P0102 guide