O2 Sensor Issue

[nhall22]

Hey guys, I'm new to Bimmerwerkz. Got a 1995 530i 5spd. Recently my check engine little started coming on intermittently and engine was running rough. I used the Peake R5 FCX3 and got codes Cb, C9, OC Od. So I replaced both O2 sensors with Bosch Premium O2 Sensors. I then cleared check engine codes with the R5 FCX3, and drove around the block. The check engine light came back on and running very rough. Rechecked codes and got OC Od, which is O2 #1 and O2 #2. Any ideas how to solve. - Thanks for the help.

[Lord Vader]

Are the sensors tight? Loose sensors after replacement will trigger it again and is common.

Can you scan for OBD codes as well? Ods are a more detailed code is stored in the computer that might give more information.

[nhall22]

Hey Vader,
Yeah they are screwed-in tight and I made sure the connectors were secure also.
I tried the stomp test to get the OBD codes, but can't seem to get the timming right ... or something. Tried at least 10 times and no reponse from OBD.

[Lord Vader]

You have to stomp the pedal to the floor 5 times in 5 seconds. completely to the floor.