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 a part that helps clean the air coming out of the car. It's like a valve that isn't working right, and it needs to be fixed to help the car run cleanly.
The P24DD code indicates a low voltage condition in the circuit controlling the Reductant Purge Control Valve B, which is part of the vehicle's emissions control system.
The Reductant Purge Control Valve B is responsible for managing the flow of diesel exhaust fluid (DEF) into the exhaust system to reduce harmful emissions. A low circuit condition suggests that there is insufficient voltage reaching the valve, which could be due to wiring issues, a faulty valve, or a problem with the control module.
• Check Engine Light illuminated
• Poor engine performance
• Increased emissions
• Faulty Reductant Purge Control Valve B
• Damaged or corroded wiring or connectors
• Faulty powertrain control module (PCM)
Reductant: A substance used to reduce emissions in diesel engines.
DEF: Diesel Exhaust Fluid, a solution used to reduce emissions in diesel engines.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the Reductant Purge Control Valve B for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the Reductant Purge Control Valve B if faulty.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-250
• Chevrolet Silverado 2500
• Ram 2500
• Regular maintenance and inspection of the emissions system.
• Ensure proper quality of diesel exhaust fluid (DEF).
• Avoid driving with a low DEF level.
Sensor Issue
• Address this issue promptly to avoid increased emissions.
• Consult a professional mechanic if unsure about repairs.
Check with the vehicle manufacturer for emissions-related warranty coverage.
This code has been associated with issues in vehicles equipped with diesel engines and advanced emissions control systems.
Moderate – While the vehicle may still be drivable, addressing this issue will ensure compliance with emissions standards and prevent further damage.
Driving with unresolved emissions issues may lead to failing emissions tests and potential fines.
• Engine running
• Vehicle at operating temperature
The Reductant Purge Control Valve B is typically located near the exhaust system or DEF tank.
Q: Can I drive with a P24DD code?
A: It's possible to drive, but it is not recommended as it may increase emissions and cause further damage.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to increased emissions, potential fines, and further damage to the emissions system.
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.