scrubnick
New Member
- Messages
- 9
- Location
- Ypsilanti, MI
My SC400 throws a CEL intermittently while driving. It will come and stay for a bit, then go away. I checked codes and got 21, 27, 28 and 29, all of which are O2 sensors. I know the sensors were all replaced about 20,000 miles ago. Why am I having this problem?