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Mitsubishi Montero Sport LS 3.0: P0136 and P0141 Error Codes Explained - Location and Meaning of Pending Codes

Model: Mitsubishi Montero Sport LS Fault Code: P0136 Posted: 2009-09-08 14:19

I own a Mitsubishi Montero Sport LS 3.0 and am currently experiencing two OBD2 error codes: P0136 (Bank 1, Sensor 2) and P0141 (Bank 1, Sensor 2). The scan tool shows both codes with pending and non-pending statuses. I'd like to understand where exactly these sensors are located on the vehicle and what 'pending' means in this context. Can anyone clarify the technical details or point me toward a reliable diagnosis method? Thank you for your help.

Related fault codes
P0136P0141
Comments (2)
Anonymous 2009-09-08 16:02

According to the Mitsubishi service manual, both P0136 and P0141 codes are typically associated with the right rear oxygen (O2) sensor or its circuit. In most cases, this is a heated oxygen sensor that monitors exhaust gas composition. If the vehicle shows these errors, it's often indicative of a faulty or degraded O2 sensor in the right rear exhaust system.

Anonymous 2009-09-09 07:45

The Powertrain Control Module (PCM) continuously monitors all sensors each time the engine starts. If a sensor sends inconsistent or faulty signals to the PCM, it will record the issue. If the fault is detected three times in succession, the PCM sets a 'hard' code and triggers the Check Engine Light (CEL). A 'pending' code occurs when the fault is detected fewer than three times—this acts as an early warning signal, indicating potential issues that may develop into full faults if not addressed.