I have a 2001 S600 with about 100K miles on it that suffered a dramatic loss of power yesterday after accidentally accellerating to the high RPM limit in 1st gear.
The CEL is on, so I checked and pulled these codes:
P0133pd O2 sensor ckt slow response bank 1 sensor 1.
There are also multiple misfire codes for many different cylinders.
P0300, P0308, P0309,P0310, P0311, P0312.
The B service due in 13 days message is also showing.

Do I just need to replace the O2 sensor?
Any advice would be appreciated.

 

Replace your O2 sensor originals or with OEM o2 sensors will be sufficient enough- thats a definately a faulty....

after replacing it clear the codes

update us on your findings

 

After clearing the codes and rechecking when the CEL came back on, all the cylinders on the left bank were giving misfire codes. After some research, replaced the complete ignition module for left bank with OE at a cost of $1000 for the part.

This solved the problem