AutoCodes – Infiniti – P1443 Infiniti

P1443 Infiniti Code - Evaporative Emission Control System Control Valve

Quick Answer

The canister control vacuum check switch is installed in the vacuum line between EVAP canister purge control solenoid valve and EVAP canister purge control valve (built into EVAP canister). Common causes include Faulty Throttle Position Sensor, Faulty Engine Coolant Temperature Sensor, Faulty EVAP Canister Purge Control Solenoid Valve. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1443 Infiniti indicates Evaporative Emission Control System Control Valve.
Common causes: Common causes include Faulty Throttle Position Sensor, Faulty Engine Coolant Temperature Sensor, Faulty EVAP Canister Purge Control Solenoid Valve.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 4,539

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1443 Infiniti Description

The canister control vacuum check switch is installed in the vacuum line between EVAP canister purge control solenoid valve and EVAP canister purge control valve (built into EVAP canister). The switch detects vacuum signal to the EVAP canister purge control valve and send an "ON" or "OFF" signal to the ECM. When no vacuum is supplied to the valve, the canister control vacuum check switch sends and "ON" signal to the ECM. When vacuum is supplied to the valve, canister control vacuum check switch sends "OFF" signal to the ECM.
The canister control vacuum check switch is not used to control the engine system. It is used only for on board diagnosis.

OBDII Code P1443 Infiniti - Evaporative Emission Control System Control Valve - AutoCodes.com — P1443 Infiniti Code - Evaporative Emission Control System Control Valve

What does this mean?

What are the Possible Causes of the DTC P1443 Infiniti?

Faulty Throttle Position Sensor
Faulty Engine Coolant Temperature Sensor
Faulty EVAP Canister Purge Control Solenoid Valve
EVAP Canister Purge Control Solenoid Valve harness is open or shorted
EVAP Canister Purge Control Solenoid Valve circuit poor electrical connection

How to Fix the DTC P1443 Infiniti?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1443 Infiniti code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.