The longer the on pulse the greater the amount of.
Bmw x5 evap system.
This indicates a fuel vapor leak in the evap control system.
The engine control module monitors for leaks and actuator malfunctions based on the evap pressure.
By means of a diagnostic module tank leakage dmtl an electrically actuated pump located at the atmospheric connection of the evaporative canister a pressure test of the evaporative system is.
P0444 bmw description the evaporative emission system canister purge volume control solenoid valve uses a on off duty to control the flow rate of fuel vapor from the evap canister.
P2402 bmw description 5 hours after the ignition switch is turned off the electric vacuum pump creates negative pressure vacuum in the evap evaporative emission system.
The evap canister purge volume control solenoid valve is moved by on off pulses from the engine control module.
It means a very small leak has been detected.