Engine-Codes - Infiniti - P0443 INFINITI

P0443 INFINITI - EVAP Canister Purge Volume Control Solenoid Valve

Repair Importance Level: 1/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0443 INFINITI 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 is the P0443 INFINITI code repair?

Start by checking 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 Infiniti vehicles. If the harness is not damaged, it's very likely that the problem is the canister purge volume control solenoid valve.

What is the cost to diagnose the P0443 INFINITI code

Labor: 1.0

The cost to diagnose the P0443 INFINITI code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0443 INFINITI Meaning

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.

More Information

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