DTC P0458: Evaporative Emission System Purge Control Valve Circuit Low; DTC P0459: Evaporative Emission System Purge Control Valve Circuit High: Description
To reduce hydrocarbon emissions, evaporated fuel from the fuel tank is routed through a charcoal canister to the intake manifold for combustion in the cylinders.
The ECM changes the duty signals to the purge valve (Vacuum Switching Valve for Purge Control) so that the intake amount of hydrocarbon emissions is appropriate for the driving conditions (engine load, engine speed, vehicle speed, etc.) after the engine is warmed up.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0458 | The voltage of purge valve circuit is low for 2.5 seconds or more. (2 trip detection logic) |
|
| P0459 | The voltage of purge valve circuit is high for 2.5 seconds or more. (2 trip detection logic) |