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 of the car that helps clean the exhaust. It's like a valve that isn't working right, and it's important for keeping the air clean.
The P24DE code indicates that the engine control module (ECM) has detected a high voltage condition in the reductant purge control valve B circuit.
The reductant purge control valve is part of the diesel exhaust fluid (DEF) system, which helps reduce emissions. A 'circuit high' condition means that the ECM is seeing a higher than expected voltage in the control circuit for this valve, which could be due to a short to voltage, an open circuit, or a faulty valve.
• Check Engine Light is on
• Possible reduction in engine performance
• Increased emissions
• Faulty reductant purge control valve
• Open or shorted wiring in the valve circuit
• Poor electrical connection in the valve circuit
ECM: Engine Control Module
DEF: Diesel Exhaust Fluid
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the voltage and resistance of the reductant purge control valve circuit.
• Replace the reductant purge control valve if faulty.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford F-250
• Chevrolet Silverado 2500
• Ram 2500
• Regularly inspect and maintain the DEF system.
• Ensure all electrical connections are clean and secure.
• Use quality DEF fluid to prevent contamination.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid driving extensively until the issue is resolved to prevent further damage.
Check with your vehicle manufacturer for specific warranty coverage related to emissions control components.
This code has been more commonly reported in diesel vehicles with DEF systems as they age and components wear.
Moderate – Addressing this code promptly can prevent increased emissions and potential engine performance issues.
Driving with a malfunctioning emissions system may violate emissions regulations and contribute to environmental pollution.
• Engine running
• Vehicle at operating temperature
The reductant purge control valve is typically located near the DEF tank or along the DEF line in the exhaust system.
Q: Can I drive my car with a P24DE code?
A: It's possible to drive, but it's not recommended as it could lead to increased emissions and engine performance issues.
Q: How can I prevent this code from appearing?
A: Regular maintenance of the DEF system and ensuring clean electrical connections can help prevent this issue.
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.