Troubleshooting P0444 Nissan: The Role of the Gas Cap and Canister Purge Valve

If you are encountering the PO444 error code, this guide will provide you with two practical solutions that you can implement at home to rectify the issue.

Firstly, using the Zeus app to scan your vehicle and identify the error code PO444 reveals that it pertains to a detected problem with the EVAP circuit.

Below are two simple do-it-yourself methods you can apply to address this problem:

Method A: The Gas Cap

Begin by opening your gas tank and assessing the condition of the cap. Use a WD-40 cleaner to spray and clean the gas tank, paying attention to the cleanliness of the gas cap. If the cap is dirty, use the cleaner to wipe it clean. If necessary, replace it with the appropriate model gas cap.

Method B: The Canister Purge Valve

The canister purge valve is typically situated behind the intake, adjacent to the throttle body. While the engine is running, verify the functionality of this component by placing your finger at the vacuum port. If your finger experiences a vacuum sensation, the canister purge valve may be stuck and necessitate replacement.

Remove the old canister purge valve and substitute it with the correct new one to resolve the issue.

By following these steps, you can effectively address the PO444 error code. After implementing the repair, utilize the Zeus app to clear the error code and rescan your vehicle to ensure that everything is functioning optimally.

What does the error code po444 refer to?

The error code po444 refers to a detected issue with the evap circuit.

What are the two methods to fix the po444 error code?

The two methods to fix the po444 error code are: method A – checking the gas cap and method B – inspecting the canister purge valve.

How to check and fix the gas cap as a solution?

To check and fix the gas cap: open the gas tank, inspect the cap condition, spray clean the gas tank with a WD-40 cleaner, and if the gas cap is dirty, clean it with the WD-40 cleaner or replace it with a correct model gas cap.

How to check and fix the canister purge valve as a solution?

To check and fix the canister purge valve: locate the valve behind the intake, place your finger at the vacuum port while the engine is running, if your finger experiences vacuum suction, it means the valve is stuck and needs to be replaced. Simply replace the used valve with the correct new one.

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