Cayman S Aft O2 Sensor Wiring Diagram
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Thread: Aft O2 Sensor Wiring Diagram

  1. #1
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    Post-Cat O2 (Bosch 'Universal') Sensor Wiring Diagram

    Well I guess I stumped the band on this one. An answer in-hand from a trusted vendor so I will share:

    ================
    Cylinders 1-3 (cyl #1 is closest to the passenger on US drivers)
    BK/YE Voltage Positive
    YE/BN Voltage Negative
    RD/BK Heater Negative
    BK/BK Heater Positive

    Cylinders 4-6
    WH/GY Voltage Positive
    BU/BN Voltage Negative
    BK/RD Heater Negative
    BK/BK Heater Positive

    ===============

    Hello friends, firstly I thank you for all the valuable posts I've read through the last 3 years. But secondly, I'm stumped...

    Well the AOS finally went on my 2006 CS, making the Jeep that was tailgating me disappear...along with the 3 cars behind him!!
    Oh well, thanks to you guys, no panic, I expected that to happen. It was time, so I replaced said AOS, plugs/coils/ and installed
    one of the first offered SOUL 987.1 catted headers they whipped up for me to connect to my SOUL cat-back already in use. So BN cats too. Purchased the Bosch OEM O2 sensor up front and in an effort to save money, got the 'universal' Bosch O2 sensor for the aft spot. Yup a mistake trying to save money I learned. Bosch offered no wiring diagram for the CS. I cut the OEM plugs and used the tricky splicers that supposedly allow oxygen to pass along the copper conductors (true ?). Something short of a wild guess on how to wire them in terms of color code. Over an hour search & many days led me to frustration on learning how the simple 4-wire circuit is supposed to be wired. At this point, I'd order the 3x more costly OEM ones but I lopped off the connectors already.
    Well I put it all together and took off with no CEL indicated until I shut it down for the first time. Dang!
    Thanks guys!
    Attached Thumbnails Attached Thumbnails Aft O2 Sensor Wiring Diagram-o2-connectors-jpg   Aft O2 Sensor Wiring Diagram-o2-wiring-bosch-jpg  
    Last edited by oZone76; 07-07-2019 at 05:41 PM. Reason: add pic

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  3. #2
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    Re: Aft O2 Sensor Wiring Diagram

    I too have the Soul Performance Catted HEaders and love all about them. Replaced all 4 O2 sensors when I did the headers and still have the after cat O2 code. I am running the OFT flash and have tried numerous times to get OFT to respond to help set wider parameter for the sensor; no luck. There customer service has gone to S*@t for Porsche.

    I am looking to add these spacers:
    https://soulpp.com/product/universal-o2-spacers/
    to see if I can tune them out.

    Please post if you use them and let us know if they work. If I get them sooner, I will post.

    BTW, I live in Florida; no emissions testing.

    Good luck.
    2006 CS, Manual, Numeric Racing Cables, Porsche Short Shifter, IPD Competition Plenum, GT3 Throttle Body, BMC Air Filter, De-Snork, Soul Performance Catted Headers, Carnewal/Cantrell Cat Back Exhaust, Dream 2 Tips, Open Flash Tablet ECU Flash,
    Royal Steering Wheel in Alcantara,
    Michelin Pilot Super Sports on 18" OZ Alleggerita HLT's in Anthracite, Sebro Slotted Rotors, Hawk 5.0 Pads, Goodridge SS Brake Lines.

  4. #3
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    Re: Aft O2 Sensor Wiring Diagram

    Thanks for the info, albeit not good news...well NY doesn't test emissions per se but the darn O2 code likely wont fly.
    I agree, that SOUL setup is excellent. The headers were so well built that I didn't even have to loose the existing cat-back system to install, they were that precise! Perfect real world drive-able sound too. (no I don't work for them haha). Any other tuner ideas are welcome, she's running stock tune at present.

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