P0133

DTC P0133
Lambda sensor aging tp bank 1 Drive cycle C:Signal out of range - above maximum.

DTC P0133
Lambda sensor aging tp bank 1 Drive cycle C:Signal out of range - below minimum.


Possible causes by suggested order of priority:
- Deteriorated oxygen sensor.

Deteriorated oxygen sensor.
- The Motronic ECM has internally diagnosed that the switching delay time of this oxygen sensor has degraded to a point where exhaust emissions will be increased.
- This fault is usually caused by the aging of the sensor in normal operation, however, this effect can be accelerated if the sensor has been contaminated with oil or other surface contamination.