New Beetle GLS L4-2.0L (AZG) (2002)
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Replace Heated Oxygen Sensor (HO2S) 1 Bank 1 -G39- before catalytic converter, item 2.
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code. See: Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
With Manufacturer Scan Tool
Oxygen Sensor And Sensor Control Before Catalyst, Checking
NOTE:
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Raise vehicle to reach oxygen sensor connector
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The oxygen sensor (before catalyst) has constant regulation and can be distinguished by a 6-pin connector from the oxygen sensor after catalyst.
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Only gold-plated terminals must be used to repair the terminals in the oxygen sensors connectors.
Special tools and equipment
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Scan tool VAG 1551 or vehicle system tester V.A.G 1552 with cable VAG 1551/3B
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Test box VAG 1598/31
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Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
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Adapter set V.A.G 1594
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Wiring diagram
Check conditions
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All fuses must be OK
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The battery voltage must be at least 11.5 V
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Exhaust system between catalyst and cylinder head must be free of leaks
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Coolant temperature must be at least 85 °C See display group 04, display zone 3
Functional check
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Connect scan tool VAG 1551 (V.A.G 1552) Start engine and select "Address word" 01 of engine control module. Engine must be running at idle
speed.
Connecting scan tool and selecting Engine Control Module (ECM). Refer to "Scan Tool Testing/Scan Tool Connecting and Initial
Checks/VAG1551 Scan Tool" See: Testing and Inspection
Indicated on display
Rapid data transfer
HELP
Select function XX
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Press buttons 0 and 8 for function "Read Measuring Value Block" and confirm entry with Q button.
Indicated on display
Read Measuring Value Block
Input display group number XXX
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Press buttons 0, 3 and 0 for "Display group number 30" and confirm entry with Q button.