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CTsoundguy
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97" Boxster O2 sensor harness repalcement
CTsoundguy replied to CTsoundguy's topic in 986 Series (Boxster, Boxster S)
Thanks to both of you. A brief recap of my saga- June- CEL comes on with 1102 & 1107 codes. I buy 2 new Bosch sensors and install them ( pre cat ). CEL out for about 75 miles and comes back on with 1115 & 1119 codes. Same problem with a different code # this time. Remove and clean MAF sensor. No chage in CEL or codes. Decide at this point I need help and take to my indy shop. Here's their conclusion- I am dubious that both new sensors could be bad, but go ahead and buy 2 more and replace them. I got about 200 miles of no CEL before it came back on, with the 1102 & 1107 codes...Not happy having spent over $500 on diagnostics which were incorrect apparently. The receipt seems to indicate the harness has been ruled out, but I don't know if they did a wire by wire check as Jeff has suggested and should try and confirm that. Not sure what to do at this point. I guess I am intimidated by both the logistics of the harness check, and fear of harming a wire at the connector end trying to check it myself. Since it is consistently both banks and the same 2 sensors, it has to be something in the electronics upstream of the senors right?
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Trying to solve a persistent CEL light which was thrown by P1102 and P1107 ( pre cat sensor heating power exceeds limit value ) I've been trying to check ( as suggested by JFP ) continuity, resistance, etc in the harness, and that has proven to be a for me, a difficult and onerous task. Troubleshooting electrical is not my forte. I'm considering just replacing the entire harness ( 996-612-988-00 ) and wonder how challenging this might be? I have already done new speed senors successfully. Would I simply leave the longer runs in the back of the trunk the trunk in place, and run the new one alongside? I don't want to create more problems by moving and messing around with old wires. I haven't seen any tutorials or videos concerning this repair. Thanks
