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 air from the exhaust. It's like a valve that isn't working right, and it helps make sure the car isn't polluting too much.
The P24DC code is triggered when the Engine Control Module (ECM) detects that the Reductant Purge Control Valve B is not performing within the expected parameters.
The Reductant Purge Control Valve B is part of the vehicle's Selective Catalytic Reduction (SCR) system, which reduces emissions by injecting a urea-based fluid into the exhaust stream. This valve controls the flow of reductant (DEF fluid) and its performance is critical for proper SCR operation. A performance issue could mean the valve is stuck, not opening or closing properly, or there is a blockage.
• Check Engine Light is on
• Reduced engine performance
• Increased emissions
• Faulty Reductant Purge Control Valve B
• Wiring issues or poor electrical connections
• Blocked or clogged reductant lines
SCR: Selective Catalytic Reduction, a system used to reduce emissions.
DEF: Diesel Exhaust Fluid, a urea-based solution used in SCR systems.
• 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.
• Replace the Reductant Purge Control Valve B if faulty.
• Repair or replace damaged wiring or connectors.
• Clean any blockages in the reductant lines.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regular maintenance of the SCR system.
• Use high-quality DEF fluid.
• Inspect and clean the exhaust system regularly.
Emission Control System Issue
• Do not ignore the Check Engine Light.
• Get the vehicle inspected by a professional mechanic.
• Avoid driving long distances until the issue is resolved.
Check with your vehicle manufacturer; emissions-related components may be covered under warranty.
This code has become more common as vehicles with SCR systems age, particularly in diesel engines.
Moderate – The vehicle may continue to operate, but emissions will be higher and performance may be affected.
Driving with a malfunctioning emission control system may violate emissions regulations and contribute to pollution.
• Engine running at operating temperature
• Vehicle in closed-loop operation
The Reductant Purge Control Valve is typically located near the DEF tank or along the reductant line.
Q: Can I drive with a P24DC code?
A: While the car may still drive, it's not recommended as it can lead to higher emissions and potential engine performance issues.
Q: What is a reductant purge control valve?
A: It's a valve in the SCR system that controls the flow of DEF fluid to reduce emissions.
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