Code Definition

P259E (73) — Turbocharger Boost Control Position Low Limit

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

About P259E

P259E 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.

When P259E is stored, the module has detected a signal or supply voltage lower than the expected operating range.

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 P259E 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 P259E:73 is set by the Engine Control Module (ECM) when the turbocharger boost control actuator position is detected at or below the calibrated lower limit and does not respond as expected to commanded control inputs. The boost control actuator, an electric or vacuum operated unit, moves the variable turbine vanes or the wastegate to regulate boost, and reports its position back to the ECM through a feedback sensor. The fault is logged when the actual position feedback remains too low for a defined period during operating conditions that require increased boost, indicating the ECM cannot a...

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