Jetta Sedan L5-2.5L (BGP) (2005)
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On vehicles with automatic transmission, selector lever must be in position "P" or "N".
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If vehicle is equipped with an A/C system, it must be switched off.
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The ground (GND) connections between engine and body must be OK.
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Exhaust system must be properly sealed between catalytic converter and cylinder head.
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Coolant temperature must be at least 80 degrees C. See: Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan
Tool/Diagnostic Mode 1: Check Measured Values
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The Oxygen Sensor (O2S) Heater - Center Three Way Catalytic Converter (TWC) Z29 must be OK, checking.
Function test
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Connect Vehicle Diagnostic and Service Information System VAS 5052. See: Testing and Inspection/Reading and Clearing Diagnostic Trouble
Codes/Scan Tool Connecting/Vehicle Diagnostic and Service Information System VAS 5052, Connecting
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Start engine and run at idle speed.
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Under address word 33, select "Diagnostic mode 5: Read Lambda test results".
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Select oxygen sensor test results for Oxygen Sensor (O2S (in Center Three Way Catalytic Converter (TWC), Bank 1 G130 (sensor 3) and check if
the specified values are attained. See: Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 5:
Check Lambda Test Results
If specified values are achieved:
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End diagnosis and switch ignition off.
If specifications are not obtained:
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End diagnosis and let engine continue to run at idle.
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Check primary voltage.
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Remove right vehicle floor covering - arrows -.
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Disconnect 4-pin harness connector (black) - 1 - to Oxygen Sensor (O2S (in Center Three Way Catalytic Converter (TWC), Bank 1 G130.