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 in your car that helps control gas fumes. It's like a valve that should open and close, but it's not working right.
The P0443 code indicates that the Engine Control Module (ECM) has detected a malfunction in the purge control valve circuit of the Evaporative Emission Control System (EVAP).
The EVAP system captures fuel vapors from the fuel tank and stores them in a charcoal canister. The purge control valve regulates the flow of these vapors into the engine to be burned. Code P0443 is set when the ECM detects an electrical issue in the circuit controlling the purge valve, which could be due to a faulty valve, wiring issues, or a defective ECM.
• Check Engine Light is on
• Increased emissions
• Possible fuel odor
• Faulty purge control valve
• Damaged or corroded wiring in the purge valve circuit
• Defective ECM
ECM: Engine Control Module, the computer that controls the engine's functions.
EVAP: Evaporative Emission Control System, which prevents fuel vapors from escaping into the atmosphere.
• Use an OBD-II scanner to confirm the code.
• Visually inspect the purge valve and its wiring for damage.
• Test the purge valve for proper operation using a multimeter.
• Replace the faulty purge control valve.
• Repair or replace damaged wiring or connectors.
• Replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $200
Moderate
• Toyota Camry
• Ford F-150
• Honda Accord
• Regularly inspect the EVAP system components.
• Keep the fuel cap tight and in good condition.
• Perform periodic emissions system checks.
Emissions Control System
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you're not familiar with car repairs.
Repairs may be covered under the emissions warranty, depending on the vehicle's age and mileage.
The P0443 code has been a common issue in vehicles since the introduction of OBD-II systems, often due to aging components or wiring issues.
Moderate – While the vehicle may still be drivable, emissions may increase, and it should be repaired to pass emissions tests.
Driving with a malfunctioning EVAP system may lead to increased emissions, which is illegal in some areas and may cause the vehicle to fail emissions tests.
• Engine at operating temperature
• Fuel tank between 1/4 and 3/4 full
The purge control valve is typically located near the engine, connected to the intake manifold and the EVAP canister.
Q: Can I drive with a P0443 code?
A: Yes, but it's not recommended as it may lead to increased emissions and potential fuel odor.
Q: Will a P0443 code cause my car to fail emissions tests?
A: Yes, a P0443 code can cause your vehicle to fail emissions tests due to increased emissions.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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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.