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 the car's computer found a problem with the part that checks if gas fumes are leaking from the fuel system. It's like a sensor that isn't working right.
The P240C code indicates that the voltage in the circuit controlling the EVAP system's leak detection pump heater is higher than expected.
The EVAP (Evaporative Emission Control) system prevents fuel vapors from escaping into the atmosphere. The leak detection pump is part of this system and it has a heater to ensure proper operation in various conditions. This code is triggered when the control circuit for this heater registers a voltage that is too high, indicating a possible electrical issue.
• Check Engine Light is on
• Possible fuel odor
• Failed emissions test
• Faulty leak detection pump heater
• Damaged wiring or connectors
• Faulty Powertrain Control Module (PCM)
EVAP: Evaporative Emission Control
PCM: Powertrain Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the leak detection pump heater for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the leak detection pump heater if faulty.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Camry
• Ford F-150
• Honda Accord
• Regularly inspect and maintain the EVAP system.
• Ensure wiring and connectors are in good condition.
• Perform regular emissions tests.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional.
• Address the issue promptly to avoid further damage.
Check with your vehicle manufacturer for specific warranty coverage related to emissions components.
This code has been more common in vehicles with aging EVAP systems, particularly in areas with extreme weather conditions.
Moderate – It should be addressed soon to avoid potential emissions issues.
Driving with a malfunctioning EVAP system may lead to higher emissions, which can be illegal in some areas.
• Vehicle must be at operating temperature.
• Perform tests in a well-ventilated area.
The leak detection pump is typically located near the fuel tank or in the rear of the vehicle.
Q: Can I drive with a P240C code?
A: While the car may still run, it's best to fix the issue to avoid emissions problems.
Q: How do I reset the Check Engine Light?
A: After repairs, you can use an OBD-II scanner to clear the code, but it will return if the issue isn't fixed.
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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.