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 MANUALSVOLKSWAGEN2002JETTA GLS SEDAN (9M2) L4-2.0L (AVH)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSAIR FLOW METER/SENSORSERVICE AND REPAIR
2002 Volkswagen Jetta GLS Sedan (9M2) L4-2.0L (AVH)
Air Flow Meter/Sensor: Service and Repair
2002 Volkswagen Jetta GLS Sedan (9M2) L4-2.0L (AVH)SECTION Service and Repair
Air Cleaner, Disassembling and Assembling
Air Cleaner:
1 - Connector
- black, 2- pin
- For Positive Crankcase Ventilation (PCV) heating element - N79-
- Check voltage supply for PCV heating element between terminals 1 and 2 with engine running
- Specification: at least 11.5 V
2 - Intake hose
- With Positive Crankcase Ventilation (PCV) heating element - N79-
3 - Mass Air Flow (MAF) sensor -G70- * with Intake Air Temperature (IAT) sensor - G42-*
- Terminals of sensor and connector are gold-plated
4 - Connector
- black, 5-pin
- Terminals of sensor and connector are gold-plated
5 - Seal
- Replace if damaged
6 - Air cleaner, upper portion
7 - Air duct
- Clipped into upper part of air cleaner
8 - 6 Nm
9 - Filter element
10 - Air cleaner, lower portion
11 - Air duct
12 - 10 Nm
13 - O-ring
- Replace if damaged
14 - Intake hose
- Check for secure fitting
- To disengage, squeeze together at front
- to Secondary Air Injection pump motor (V101)
15 - Connection - hose
- To air pipe for air cleaned fuel injectors
16 - Connection - hose
- For crankcase ventilation
- From ventilation housing at cylinder head cover
17 - Connection- hose
- From connecting pipe at upper part of intake manifold
18 - To throttle valve control module - J338-
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.