Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that a part of your car that checks for fuel leaks is stuck and not working properly.
The P24C0 code indicates that the leak detection pump's switching valve in the EVAP system is stuck in the 'on' position, preventing proper operation.
The EVAP (Evaporative Emission Control) system is designed to capture fuel vapors from the fuel tank and prevent them from escaping into the atmosphere. The leak detection pump is a component of this system that pressurizes the system to check for leaks. The switching valve controls the operation of the pump. If the valve is stuck in the 'on' position, it can lead to incorrect leak detection results.
• Check Engine Light is on
• Failed emissions test
• Noticeable fuel odor
• Faulty leak detection pump switching valve
• Electrical issues such as a short circuit in the valve circuit
• Corrosion or debris causing the valve to stick
EVAP: Evaporative Emission Control System, which prevents fuel vapors from escaping into the atmosphere.
OBD-II: On-Board Diagnostics II, a standardized system for self-diagnostics and reporting in vehicles.
• Use an OBD-II scanner to confirm the code.
• Inspect the EVAP system for visible damage or leaks.
• Test the switching valve for proper operation.
• Replace the faulty switching valve.
• Repair or replace damaged wiring or connectors.
• Clean the valve if debris is causing it to stick.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect the EVAP system for damage.
• Ensure the fuel cap is properly tightened.
• Keep the vehicle's electrical system in good condition.
Emission Control System Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you notice a fuel smell.
Check with the vehicle manufacturer for warranty coverage on emission control components.
EVAP system issues have been common in vehicles as emission standards have become stricter.
Moderate – Address the issue to avoid failed emissions tests and potential fuel vapor leaks.
Driving with a malfunctioning EVAP system may result in increased emissions and is illegal in some areas.
• Vehicle at operating temperature
• Fuel tank between 15% and 85% full
The leak detection pump and switching valve are typically located near the fuel tank or in the rear of the vehicle.
Q: Can I drive with a P24C0 code?
A: While you can drive with this code, it's best to address it soon to avoid emissions issues.
Q: Will a P24C0 code affect my fuel economy?
A: It might not directly affect fuel economy, but unresolved issues can lead to other problems that might.
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Universal · Digital multimeter
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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.