P0102: Mass or Volume Air Flow Sensor Circuit Low Input
3 vehicles · 2 makes · $10-$900 repair
Most Reported On
P0102 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2007-2019 Nissan Versa, 2000-2003 BMW M5, and 2007-2019 Nissan Sentra, with repair costs ranging from $10 to $900.
Common Causes
Typical Repair Cost
Based on 3 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0102, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (3)
FAQ
What does P0102 mean?
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.
What are the most common causes of P0102?
The most common causes of P0102 are: 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. The specific cause varies by vehicle.
How much does it cost to fix P0102?
Repair costs for P0102 range from $10 to $900, depending on the vehicle and root cause.
Which vehicles are affected by P0102?
Au7o has documented P0102 across 3 vehicle models from 2 manufacturers: BMW, Nissan.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.