Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car has a system to check for leaks in the gas tank and pipes. This code means there's a problem with the part that checks for leaks, like a light switch that won't turn off.
The P2402 code indicates that the Engine Control Module (ECM) has detected a high voltage condition in the EVAP system leak detection pump control circuit.
The EVAP (Evaporative Emission Control) system prevents fuel vapors from escaping into the atmosphere. The leak detection pump is a component of this system that checks for leaks. A high circuit condition means that the voltage is higher than expected, which can indicate a wiring issue or a faulty component.
• Check Engine Light illuminated
• Possible fuel odor
• Failed emissions test
• Faulty leak detection pump
• Wiring issues or poor connections
• Faulty ECM
EVAP: Evaporative Emission Control System
ECM: Engine Control Module
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connections to the leak detection pump.
• Test the leak detection pump for proper operation.
• Repair or replace faulty wiring or connectors.
• Replace the leak detection pump if defective.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $500
Moderate
• Toyota Camry
• Ford F-150
• Honda Accord
• Regularly inspect wiring and connectors.
• Maintain the EVAP system components.
• Perform routine vehicle diagnostics.
Emission Control System Issue
• Address the issue promptly to avoid failing emissions tests.
• Consult a professional mechanic if unsure about repairs.
Check if the vehicle's emissions warranty covers EVAP system components.
The P2402 code has been associated with EVAP system issues in vehicles since the introduction of OBD-II standards.
Moderate – While not immediately critical, it can lead to emissions test failures and should be addressed soon.
Driving with an emissions system fault can lead to increased pollution and may be illegal in some areas.
• Vehicle at operating temperature
• Fuel tank between 15% and 85% full
The leak detection pump is typically located near the fuel tank or within the EVAP canister.
Q: Can I drive with a P2402 code?
A: Yes, but it's best to fix it soon to avoid emissions issues.
Q: Will a P2402 code affect my fuel economy?
A: Not directly, but unresolved EVAP issues can lead to other problems.
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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.