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JMstamford,ct
Looks like new O2 sensor. This is the second display of the same code in a year. I suspect the sensor is dying, but not dead.
I think I will replace the two initial O2 sensors. Keep them tracking together.
Thoughts?
And what is the current thinking about the best source for these?
I am going to buy from a reputable source and a name brand item. I want to do this repair once only.
My Boxster OBD2 reference is at home but I think that's an O2 sensor heater problem.
There may be a test to check the continuity of the heater circuit of the sensor but I'd have to have my reference handy to know the pins to use for this.
There is nothing like cleaning or really anything else you can do with the old sensors. They either work right or they don't.
Certainly do nothing with the new sensors other than leave them the box until you are ready to install and when installing do not touch the tip and handle the sensors carefully and install them promptly.
Regarding bad sensors the DME is pretty good at spotting a bad sensor so you could just replace it and I like the idea of replacing the bad sensor's counterpart on the other side to help ensure both banks have the same O2 sensor response times, sensitivity, etc.
Can't help you with source and brand name although when I had the sensors replaced in my 996 Turbo the tech -- at an indy no less -- said he'd use Bosch. I was in a hurry -- had to get the car smog checked so I said go ahead. The tech was the same tech that worked on the car at the Porsche dealer and I trusted him on this. So far the sensors appear to be just fine. The engine perked up a bit after new sensors were installed which was a plus.
For my 2002 Boxster when I had the sensors replaced at 305K miles I just had the tech install whatever the Porsche parts department supplied.
If you buy from some aftermarket parts supplier you want to be sure you get sensors that are suitable for use with the Boxster and have the right connectors and the proper length wiring leads so you can route the lead correctly to avoid it touching a hot exhaust pipe or getting damaged by road debris flying up. Also, the lead doesn't want to flop about as this can lead to connector or wiring damage.