Jetta GLS L4-1.8L Turbo (AWD) (2001)
NOTE: The heated oxygen sensor may be switched on or off depending on the operating mode of the engine, therefore the display in display zone
2 may show "Htg.bC.ON or alternating from Htg.bC.ON to Htg.bC.OFF.
If the display does not indicate as described:
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Remove protective cover (arrows) and separate 4-pin connector (black) to Oxygen sensor before catalyst (G39).
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Check probe heating for continuity at Oxygen sensor connector contacts 1 and 2.
If it is determined that probe heating has an open circuit:
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Replace Oxygen sensor before catalyst (G39).
If probe heating has continuity: