Touareg V8-4.2L (BAR) (2007)
‹› The Oxygen Sensor (O2S) Heater (Z19) and Oxygen Sensor (O2S) 2 Heater (Z28) before catalytic converter OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› A/C switched off.
‹› Ground (GND) connections between engine/transmission/chassis OK.
‹› Exhaust system between catalytic converter and cylinder head properly sealed.
‹› Coolant Temperature at least 80° C.
Test procedure
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Perform a preliminary check to verify the customers complaint. Refer to --> [ Preliminary Check ] See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Preliminary Check.
Start diagnosis
Function test
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Connect scan tool.
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Start the engine and let it run at idle.
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Select "Diagnostic mode 6: Check test results of components that are not continuously monitored".
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Select "Test-ID 01: Oxygen sensor monitoring before catalytic converter".
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Select "Test-ID 131: Dynamic test".
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Check the specified values at idle.
If specified values are obtained:
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End diagnosis and switch the ignition off.
If the specified values are not obtained: