Code Definition

P2BAE (02) — NOx Exceedance – NOx Control Monitoring System

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

About P2BAE

P2BAE is a generic (obd-ii standard) powertrain diagnostic trouble code recorded for Land Rover vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

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 P2BAE 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

DTC P2BAE:02 is set by the Engine Control Module (ECM) when the NOx control monitoring system determines that tailpipe NOx emissions have exceeded the calibrated legal threshold despite the commanded emissions control strategies being active. The system uses upstream and downstream NOx sensors to measure how effectively the SCR catalyst is converting NOx, and this exceedance code reflects a monitored emissions failure rather than a single component electrical fault. The fault is logged when sensor feedback indicates insufficient NOx reduction over a defined drive cycle, typically during steady...

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