Code Definition

P013D — Oxygen sensor signal slow to change from lean to rich - Bank 2 - sensor 2

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

About P013D

P013D 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 P013D 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 P013D 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 is set when the engine control module (ECM) detects that the oxygen (O2) sensor in Bank 2, Sensor 2, is slow to respond during the transition from a lean to rich condition. This indicates a lag in the sensor's ability to react to changes in the composition of exhaust gases, possibly due to sensor wear, contamination, or malfunction. It can also suggest problems within the exhaust system or with fuel delivery that are affecting the sensor's performance. Bank 2 Sensor 2 is typically positioned after the catalytic converter and is responsible for assessing its efficiency.

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