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Old 08-25-2013, 03:00 AM   #1
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I think it's time for new O2 sensors

Hi Folks. I've been getting codes P0134 and P00154 lately. I clear them and eventually they come back. I guess after 87k in the clock, it may be time to replace the pre cat sensors. Can anything else cause the codes?
'99 Boxster Artic Silver/Red
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Old 08-25-2013, 01:04 PM   #2
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yep... lots of things can cause the codes. It's extremely rare for more than one O2 to go at a time (unless there is another underlying issue). A fault code for O2s only means the value they are reporting to ECU are outside of norm. Test the O2s individually using using a multi-meter to see if they are really bad...

Good luck
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Old 08-25-2013, 07:31 PM   #3
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P0134/P0154 sound like broken connection or failed DME, not aging O2 sensors. Possibly a rodent damaged the wiring at a bulkhead.
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