Golf L4-1.8L Turbo (AWW) (2003)
If the specifications are not attained:
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Road test vehicle to free oxygen sensor of possible residues and repeat test.
Observe the valid safety precautions when carrying out a road test See: Service Precautions/Technician Safety Information
If the specifications are again not attained:
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Check basic voltage. Refer to "Oxygen Sensor (O2S) Behind Catalytic Converter/Sensor and Sensor Control Check" See: