OBD-II Trouble Code Description for P0141 Subaru

O2 Sensor Heater Circuit

What does this mean?

OBD2 Code P0141 Subaru definition:
This code means that the heated circuit in the oxygen sensor on bank 1 decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0141 Subaru. See also: P0135 Subaru (Bank 1, Sensor 1).

Symptoms

Possible sumptoms of OBD code P0141 Subaru
You will likely notice poor fuel economy the illumination of the Check Engine Light.

Causes

Possible causes of OBD code P0141 Subaru
A code P0141 Subaru may mean that one or more of the following has happened: open or short to ground in the wiring harness O2 heater circuit wiring high resistance O2 heater element resistance is high Internal short or open in the heater element Note: Typically a failed catalytic converter does not cause this code. You’re more likely to see a P0420 Subaru code for a failed converter.

Possible Solutions

Replace oxygen sensor (cannot repair open or short that occurs internally to sensor) Repair short or open or high resistance in wiring harness or harness connectors