1998 D1 Codes: P0150 & P0130

Casey Pontes

Well-known member
Mar 24, 2019
54
7
Utah
Greetings,

I'm getting two codes on my 1998 Discovery 1:

P0150 - O2 Sensor Circuit Bank 2 Sensor 1
P0130 - O2 Sensor Circuit Bank 1 Sensor 1

Has anyone received both of these codes together, and, if so, was the fix to replace both O2 sensors, or might the problem be different or more complex? Also, does anyone know of online write-ups/tutorials (either on this site or other sites) related to changing O2 sensors?

Thanks!

Casey
 

bradartigue

Well-known member
Mar 7, 2018
112
17
Sandy Springs, Georgia
Simultaneous failure of both sensors is likely not the sensors themselves. Those codes relate to the voltage sent to the ECU from the O2 sensors being outside of the acceptable range. Regardless of engine manufacturer you can get simultaneous failures from running too lean (too much air) from an air leak in the injection system, which would be my first suspicion.

Question is, do they fail simultaneously?