Code Definition

P013C — Oxygen sensor signal slow to change from Rich to lean - Bank 2 - sensor 2

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P013C

P013C is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P013C is stored, the module has detected a signal or supply voltage lower than the expected operating range; a bank-specific fault, meaning it applies only to one cylinder bank of a multi-bank engine; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P013C is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

This fault code indicates that the engine control module (ECM) has detected a slow response from the oxygen (O2) sensor in Bank 2, Sensor 2, when transitioning from a rich to lean condition. This slow response suggests that the sensor is not reacting quickly enough to changes in the exhaust gas composition, which could be due to sensor aging, contamination, or a fault in the sensor itself. This condition might also be reflective of issues in the exhaust flow or inconsistencies in fuel delivery affecting the sensor's readings. Bank 2 Sensor 2 is generally located downstream of the catalytic con...

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