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 has detected a problem with the sensor that checks the pressure in the system that prevents fuel vapors from escaping. It's like when a balloon has a tiny hole and can't hold air properly.
The P24BB code indicates that the voltage signal from the EVAP system leak detection pump pressure sensor is higher than expected by the vehicle's engine control module (ECM).
The EVAP (Evaporative Emission Control) system is designed to capture and store fuel vapors from the fuel tank and prevent them from escaping into the atmosphere. The leak detection pump pressure sensor monitors the pressure in the EVAP system to ensure it is sealed properly. If the sensor sends a high voltage signal, it may indicate a malfunction or fault in the sensor circuit.
• Check Engine Light (CEL) is illuminated
• Possible fuel odor
• Failed emissions test
• Faulty EVAP leak detection pump pressure sensor
• Wiring issues such as short circuits or open circuits
• Faulty ECM (Engine Control Module)
EVAP: Evaporative Emission Control System, which prevents fuel vapors from escaping into the atmosphere.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to verify the code
• Inspect the EVAP pressure sensor and wiring for damage
• Test the sensor's voltage and resistance
• Replace the EVAP leak detection pump pressure sensor
• Repair or replace damaged wiring or connectors
• Reprogram or replace the ECM if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect EVAP system components
• Perform routine vehicle maintenance
• Avoid overfilling the fuel tank
Sensor Issue
• Address the issue promptly to avoid emissions test failures
• Consult a professional mechanic if unsure about repairs
Check with your vehicle manufacturer for warranty coverage on emissions-related components.
The P24BB code is relatively common in vehicles with advanced EVAP systems, especially as they age and components wear out.
Moderate – While the vehicle may still operate normally, it is important to address this issue to maintain emissions compliance and fuel efficiency.
Driving with an unresolved emissions system issue may violate local emissions laws and contribute to environmental pollution.
• Engine running
• EVAP system under test conditions
The EVAP leak detection pump pressure sensor is typically located near the fuel tank or within the EVAP canister assembly.
Q: Can I drive my car with a P24BB code?
A: While you may be able to drive, it's best to fix the issue soon to avoid emissions problems and potential fuel efficiency loss.
Q: How do I reset the Check Engine Light after fixing the P24BB code?
A: You can use an OBD-II scanner to clear the code, or the light may turn off automatically after several drive cycles if the issue is resolved.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
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.
View on Amazon
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.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.
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.