SLK-Class (R170) 1998-2003: SLK 200, SLK 230K, SLK 320

SLK/R170: p0131 & p0171 codes

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Old 07-10-2006, 11:10 AM
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p0131 & p0171 codes

hi
i have slk230 2002 and the engine light on
i have 2 codes
p0131 o2 sensor circuit low voltage(bank 1 sensor 1)

p0171 system too lean (bank 1)

what i need to do?
Old 07-10-2006, 11:20 AM
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Seems obvious to me, change the O2 sensors. Sensor 1 is the pre-cat sensor. They get carbon buildup over time and then go bad.

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