Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer thinks there's a problem with the cap on a special tank that helps reduce pollution. It's like when a toy's battery cover isn't on right, and the toy doesn't work properly.
The P24CC code indicates an issue with the electrical circuit related to the reductant tank cap switch, which monitors the cap's position to ensure it's properly closed.
The reductant tank is part of the vehicle's Selective Catalytic Reduction (SCR) system, which reduces nitrogen oxide emissions. The cap switch circuit monitors whether the tank cap is properly sealed. If the circuit's readings are outside the expected range, the P24CC code is triggered.
• Check Engine Light illuminated
• Possible reduction in engine performance
• Increased emissions
• Faulty reductant tank cap switch
• Damaged or corroded wiring/connectors
• Faulty Engine Control Module (ECM)
Reductant: A substance used in the SCR system to reduce emissions.
SCR: Selective Catalytic Reduction, a system used to reduce nitrogen oxide emissions in diesel engines.
• Inspect the reductant tank cap for proper installation.
• Check the wiring and connectors for damage or corrosion.
• Test the reductant tank cap switch for proper operation.
• Replace the reductant tank cap switch if faulty.
• Repair or replace damaged wiring/connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $300
Moderate
• Ford F-250
• Chevrolet Silverado 2500
• Ram 2500
• Regularly check the reductant tank cap for proper sealing.
• Perform routine inspections of the SCR system.
• Ensure the vehicle's software is up to date.
Sensor Issue
• Avoid driving with the Check Engine Light on for extended periods.
• Have the vehicle diagnosed by a professional if unsure.
• Regularly maintain the vehicle's emission system.
Emission-related components may be covered under the vehicle's emissions warranty. Check with the manufacturer.
The P24CC code has become more common with the increased use of SCR systems in diesel vehicles to meet stricter emission standards.
Moderate – While the vehicle may still be drivable, emissions and performance may be affected.
Driving with a malfunctioning emission system may violate emissions laws and contribute to pollution.
• Vehicle at operating temperature
• Engine running and at idle
The reductant tank cap is located on the reductant tank, typically found near the rear of the vehicle or in the engine compartment.
Q: Can I drive with a P24CC code?
A: While the vehicle may still be drivable, it's best to address the issue to avoid increased emissions and potential engine performance issues.
Q: What happens if I ignore the P24CC code?
A: Ignoring the code can lead to increased emissions, potential fines for non-compliance with emissions laws, and possible damage to the SCR system.
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