OBD-II Trouble Code Description for P0138 Land Rover

O2 Sensor Circuit High Voltage

What does this mean?

OBD2 Code P0138 Land Rover definition:
The Heated Oxygen Sensor (2) located rear of catalytic converter produces an output signal relative to oxygen storage capacity of catalytic converter. Ho2S 2 signal is less active than signal produced by front oxygen sensor. This code sets when HO2 Sensor voltage is greater than 999 mV for more than 2 minutes (time depends on model. Could be as high as 4 minutes)

Symptoms

Possible sumptoms of OBD code P0138 Land Rover
There may be no noticeable symptoms except for MIL illumination. Possible high fuel pressure can over rich the system.

Causes

Possible causes of OBD code P0138 Land Rover
A code P0138 Land Rover may mean that one or more of the following has happened: Faulty O2 sensor Short to battery voltage in O2 sensor signal circuit High fuel pressure (not as likely)

Possible Solutions

Here are some potential solutions: Replace O2 sensor Repair short to battery voltage in o2 sensor signal circuit