How to test and replace the EVAP Canister Purge Volume Control Valve P1445

The EVAP canister purge control volume control valve is operated by a step motor for control of flow rate of fuel vapor from EVAP canister. Each time the valve opens or closes to change the flow rate, an on pulse is issued. When no change in the flow rate is needed, the valve remains at a certain opening, hence no pulse signal output is issued. This was performed on a 1997 Nissan Maxima. Check with your vehicle's repair manual for testing parameters.
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P1445 - An improper voltage signal is entered to ECM through the valve. Or, the canister purge flow is detected during the specified driving conditions, even when EVAP canister purge volume control valve is completely shut off.
Note:
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