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		986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical Chat
P0140 cel

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03-18-2014, 09:35 AM	#1
tdamlo Registered User Join Date: Jun 2013 Posts: 14	P0140 cel I have a 97 boxster base 2.5 and I just got a p0140 cel indicating oxygen sensor after catalytic converter(cylinders 1-3) interruption of signal. I recently replaced my clutch, coolant overflow, and added a topspeed exhaust. From what I have read on the forums that code typically refers to a bad connection not a bad oxygen sensor. What is the proper method for testing an oxygen sensor and related wiring? Which side of the car are cylinders 1-3? Sent from my iPhone using Tapatalk

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