Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSVOLKSWAGEN2002GOLF GLS, 2.0 K, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 11 (1.9L - DIESEL FUEL INJECTION - TDI, ALH, BEW (GENERIC SCAN TOOL) (A4 PLATFORM))DIESEL FUEL INJECTIONCOMPONENTS AND FUNCTIONS, CHECKINGMASS AIR FLOW (MAF) SENSOR, CHECKINGFUNCTION TEST
2002 Volkswagen Golf GLS, 2.0 K, Standard
Function test
2002 Volkswagen Golf GLS, 2.0 K, StandardSECTION Function test
WARNING: This page is about a different variant/trim than selected.
- Connect diagnostic tester; see DIAGNOSTIC TESTER, CONNECTING .
- Start engine and let run at idle.
- Under address word 33, select "Diagnostic mode 1: Check measured values."
- Select the measuring value "PID 16: Air flow quantity at Mass Air Flow (MAF) sensor".
- Check specified value of air flow quantity at Mass Air Flow (MAF) Sensor at idle.
Specified value: 2.80 to 5.30 g/sec
- End diagnosis and switch ignition off.
If specified value is obtained, but DTC memory has a DTC concerning Mass Air Flow (MAF) sensor:
- Check voltage supply of Mass Air Flow (MAF) sensor, see VOLTAGE SUPPLY FOR MASS AIR FLOW (MAF) SENSOR, CHECKING .
If specified value is not obtained:
- Check signal and Ground (GND) wires of Mass Air Flow (MAF) sensor, see CHECKING SIGNAL AND GROUND WIRES OF MASS AIR FLOW (MAF) SENSOR .
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.