What Does P0141 Code Mean?
Fault Code Definition
The Catalyst Monitoring Oxygen Sensor evaluates the rear most Catalytic Converter's emissions-reducing capability. Code P0141 is set when the Rear Oxygen Sensor does not show signal activity indicative of closed loop fuel system operation within the required time.
P0141 Symptoms
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Check Engine Light will illuminate
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In many cases, no abnormal symptoms may be noticed
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In some cases, the vehicle will fail an Emissions Test
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In many cases, the NOx emissions will be elevated
Common Problems That Trigger the P0141 Code
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Defective Rear Most Oxygen Sensor
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Faulty Rear Most Oxygen Sensor wiring or connections
Common Misdiagnoses
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Oxygen Sensor Sensor is replaced when the problem is a defective Catalytic Converter
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Oxygen Sensor is replaced when the problem is faulty sensor wiring or connections
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Oxygen Sensor is replaced when the problem is an exhaust leak before the Rear Oxygen Sensor