02 Sensors

[manxman]

Recently I bought a 97 Boxster with 98,000 on the Odo. The car ran fine but I had a engine check light on. I bought a meter to check and erase the codes and it read 02 sensors with 3 variations of potential problems. I opted to change out ALL 4 02 sensors and bought the kind with the correct ends and replaced the units. I'm STILL getting an engine check light and 02 codes after clearing the codes! Any suggestions?

[kbrandsma]

Recently I bought a 97 Boxster with 98,000 on the Odo. The car ran fine but I had a engine check light on. I bought a meter to check and erase the codes and it read 02 sensors with 3 variations of potential problems. I opted to change out ALL 4 02 sensors and bought the kind with the correct ends and replaced the units. I'm STILL getting an engine check light and 02 codes after clearing the codes! Any suggestions?

Did you use any electrical spray on the O2 connections. Porsche recommends not to. To clean the connections they recommend connecting and reconnecting a couple of time. I had codes P1115 P1117 P1119 P1121 after purchasing new O2 ans tried the connecting and reconnecting thing and it seemed to do the trick.

[manxman]

Thanks for the input! I did NOT spray anything on the electrical connector ends, just snapped them in place (boy is that a chore on the rear two, any easy way to get to them?) But when you say reconnecting them do you do it with the key on or off? I'm assuming you mean off? Just disconnect the snap part an reconnect it? The codes I got AFTER I put them in were: P1121~heating of pre cat cyl 4~6, P0160~ post cat 02 sensor cyl 4~6, P1115~pre cat 02 sensor heating cyl 1~3, P1119~pre cat 02 sensor cyl 4~6, P1117~pre cat 02 sensor cyl 1~3

[kbrandsma]

Thanks for the input! I did NOT spray anything on the electrical connector ends, just snapped them in place (boy is that a chore on the rear two, any easy way to get to them?) But when you say reconnecting them do you do it with the key on or off? I'm assuming you mean off? Just disconnect the snap part an reconnect it? The codes I got AFTER I put them in were: P1121~heating of pre cat cyl 4~6, P0160~ post cat 02 sensor cyl 4~6, P1115~pre cat 02 sensor heating cyl 1~3, P1119~pre cat 02 sensor cyl 4~6, P1117~pre cat 02 sensor cyl 1~3

I left the key out of the ignition (don't think it matters) and just connect and re-connect a couple of times. Reset the codes and see what happens.

[kbrandsma]

Thanks for the input! I did NOT spray anything on the electrical connector ends, just snapped them in place (boy is that a chore on the rear two, any easy way to get to them?) But when you say reconnecting them do you do it with the key on or off? I'm assuming you mean off? Just disconnect the snap part an reconnect it? The codes I got AFTER I put them in were: P1121~heating of pre cat cyl 4~6, P0160~ post cat 02 sensor cyl 4~6, P1115~pre cat 02 sensor heating cyl 1~3, P1119~pre cat 02 sensor cyl 4~6, P1117~pre cat 02 sensor cyl 1~3

I left the key out of the ignition (don't think it matters) and just connect and re-connect each connection a couple of times. Reset the codes and see what happens. If you want to become a "Contributing Member", you can also check the TSB's (Service Bulletins) under the DIY Menu above and check 986 Current TSB's Bulletin # 2469 - Oxygen Sensor Connections.

Good luck!