Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a part of the car that helps control pollution. It's like a valve that helps keep bad gases from escaping into the air, and it's not working right.
The P1443 code indicates a malfunction in the evaporative emission control system, specifically with the control valve that manages the flow of fuel vapors.
The evaporative emission control system prevents fuel vapors from escaping into the atmosphere. The control valve is responsible for regulating the flow of these vapors to the engine for combustion. A P1443 code is triggered when the control valve fails to operate as expected, either due to a mechanical failure, electrical issue, or blockage.
• Check Engine Light is on
• Fuel odor around the vehicle
• Poor fuel economy
• Faulty evaporative emission control valve
• Clogged or damaged EVAP canister
• Leaking or disconnected vacuum hoses
EVAP: Evaporative Emission Control System
Control Valve: A component that regulates the flow of fuel vapors
• Check for any visible damage or disconnections in the EVAP system components.
• Test the control valve for proper operation using a multimeter.
• Inspect the EVAP canister for clogs or damage.
• Replace the faulty control valve.
• Repair or replace damaged vacuum hoses.
• Clean or replace the EVAP canister.
• OBD-II scanner
• Multimeter
• Vacuum pump
$100 - $300
Moderate
• Ford Ranger
• Mazda B-Series
• Ford Explorer
• Regularly inspect and maintain the EVAP system.
• Ensure all hoses and connections are secure.
• Use quality fuel to reduce residue build-up.
Emissions Control System Issue
• Have the vehicle inspected by a professional if the Check Engine Light is on.
• Avoid overfilling the fuel tank to prevent EVAP system damage.
Check with the vehicle manufacturer for emissions-related warranty coverage.
The P1443 code has been commonly associated with Ford and Mazda vehicles from the late 1990s to early 2000s.
Moderate – While it may not affect immediate drivability, it can lead to increased emissions and fuel consumption.
Driving with a malfunctioning EVAP system can lead to higher emissions, which may violate environmental regulations.
• Vehicle at operating temperature
• Fuel tank between 15% and 85% full
The control valve is typically located near the charcoal canister, which is usually mounted in the engine bay or near the fuel tank.
Q: Can I drive with a P1443 code?
A: Yes, but it's best to fix it soon to avoid increased emissions and fuel consumption.
Q: Will a P1443 code affect my vehicle's performance?
A: It might not affect performance immediately, but it can lead to poor fuel economy and increased emissions.
Budget · Enhanced code reader
A wired color-screen reader with readiness hotkeys, live data, code definitions, and data logging.
Good for emissions-related codes because it exposes readiness monitors and live powertrain data.
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Specialty · Smoke machine
Helpful for finding EVAP and vacuum leaks that are hard to see with visual inspection alone.
Helpful for tracking down EVAP and vacuum leaks that can trigger emissions faults.
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Specialty · O2 sensor socket
Helpful when the code points toward exhaust or oxygen-sensor work and space is tight.
Useful when the diagnosis points toward oxygen-sensor removal or replacement.
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Fitment Required · Vehicle-fitment part
Relevant when EVAP diagnosis points toward purge-flow or purge-control faults.
EVAP diagnosis often includes purge-flow and valve-control faults.
Confirm the failed valve and exact fitment before buying parts.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.