My 996.2 C2 threw an EML light last week. I bought an OBD dongle and read the codes. I thought I had taken a screenshot of the code, but of course hadn't before I cleared the code and can't remember what code it was. It was cat/sensor related though.
I monitored the oxygen sensor voltages. Both the pre-cat sensors are switching nicely between 0.1 and 0.7 V and look very similar to each other. However, the post-cat sensors are not showing the same. Bank 1 is pretty much flat on 0.1V and bank 2 is more variable and around 0.6V.
I had a search but couldn't find any info on typical post cat voltages. Any thoughts on what the typical voltage is and whether the difference is an indication of a duff sensor or a duff cat? Car has done 93k and appears to be on the original cats.
Thanks in advance!!
I monitored the oxygen sensor voltages. Both the pre-cat sensors are switching nicely between 0.1 and 0.7 V and look very similar to each other. However, the post-cat sensors are not showing the same. Bank 1 is pretty much flat on 0.1V and bank 2 is more variable and around 0.6V.
I had a search but couldn't find any info on typical post cat voltages. Any thoughts on what the typical voltage is and whether the difference is an indication of a duff sensor or a duff cat? Car has done 93k and appears to be on the original cats.
Thanks in advance!!