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-   -   O2 sensor issue (http://986forum.com/forums/boxster-general-discussions/83545-o2-sensor-issue.html)

dorsaiboxster 06-17-2023 05:52 PM
O2 sensor issue
 
have a 2004 base Boxster, 130K miles ...

am getting a P0056 HO2S Heater Control Circuit and P0161 O2 Sensor Heater Circuit errors ...

have replaced O2 sensor twice ... no joy ...

could this be a wiring harness issue ?

Thanks

tcoradeschi 06-18-2023 05:01 AM
I assume that you have checked the fuse(s)? If you disconnect the sensor, do you see 12V at the connector?

dorsaiboxster 06-18-2023 09:35 AM
Quote:
Originally Posted by tcoradeschi (Post 654090)
I assume that you have checked the fuse(s)? If you disconnect the sensor, do you see 12V at the connector?
fuse is good ... I'll have my guy check the voltage ... Thanks

tcoradeschi 06-19-2023 03:51 AM
Fuse is visually good or actually checks out as good with a meter? Cheap to replace if it hasn’t been.

dorsaiboxster 06-19-2023 05:17 AM
Quote:
Originally Posted by tcoradeschi (Post 654111)
Fuse is visually good or actually checks out as good with a meter? Cheap to replace if it hasn’t been.
fuse also handles injector circuit ... car won't run if fuse pulled ... fuse is good ...

Gigi 06-26-2023 01:30 PM
Water Temperature Sensor
 
Had the same problem codes thinking it will go away with new OS, but did not. Had to buy a new Water Temperature Sensor 99660641000. Easy part to replace, first disconnect batt. Water temp sensor its located on the oil pump. Clear codes at the end. Since then had no code issues.
Hope it works for you. Good luck.

Radman 06-27-2023 08:36 AM
What O2 sensors did you use?

dorsaiboxster 06-28-2023 05:28 AM
Quote:
Originally Posted by Radman (Post 654248)
What O2 sensors did you use?
A NTK 25727 from Rock Auto ...

wiebuschk 06-28-2023 06:34 AM
This would be the post cat on the drivers side. Is that what you replaced?


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