EVAP Canister Purge Volume Control Solenoid Valve
Table of contents
P0443 NISSAN Possible Causes
- Faulty EVAP Canister Purge Volume Control Solenoid Valve
- EVAP Canister Purge Volume Control Solenoid Valve harness is open or shorted
- EVAP Canister Purge Volume Control Solenoid Valve circuit poor electrical connection
- Faulty EVAP Control System Pressure Sensor
How do I fix code P0443 NISSAN?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- It’s a very common problem with Nissan vehicles. If the harness is not damaged, it’s very likely that the problem is the canister purge volume control solenoid valve.
- There is a factory service bulletin for the following Nissan models:
- 2008 Nissan Maxima
- 2008 Nissan Pathfinder
- 2008 Nissan Xterra
- 2008 Nissan Frontier
- 2008 Nissan Quest
- Nissan Factory Service Bulletin OBDII Code P0443
- The service bulletin recommends reprogramming the Engine Control Module (ECM) to repair the problem.
Cost of diagnosing the P0443 NISSAN code
The cost of diagnosing the P0443 NISSAN code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0443 NISSAN Description
This system controls the flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass passage in the EVAP canister purge volume control solenoid valve changes to control the flow rate. The EVAP canister purge volume control solenoid valve repeats ON/OFF operation according to the signal sent from the Engine Control Module (ECM). The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor from the EVAP canister is regulated as the airflow changes.
The EVAP canister purge volume control solenoid valve uses an ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. The EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount of fuel vapor that will flow through the valve.
The Diagnostic Trouble Code (DTC) will set when the canister purge flow is detected during the specified driving conditions, even when the EVAP canister purge volume control solenoid valve is completely closed.