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 temperature of a special fluid used to clean the car's exhaust is too hot.
The P24FF code is triggered when the temperature sensor in the reductant system detects a temperature that exceeds the normal operating range.
The reductant system, often associated with Diesel Exhaust Fluid (DEF), uses a temperature sensor to ensure the fluid remains within a specific temperature range. If the temperature exceeds this range, it can indicate a malfunction in the heating system or sensor itself.
• Check Engine Light illuminated
• Possible reduction in engine performance
• Increased emissions
• Faulty reductant temperature sensor
• Malfunctioning reductant heater
• Electrical issues such as short circuits or poor connections
Reductant: A fluid used in diesel engines to reduce emissions.
DEF: Diesel Exhaust Fluid, a type of reductant used in selective catalytic reduction systems.
• Use an OBD-II scanner to confirm the code.
• Inspect the reductant temperature sensor and wiring for damage.
• Check the operation of the reductant heater.
• Replace the reductant temperature sensor if faulty.
• Repair or replace the reductant heater if malfunctioning.
• Fix any wiring or electrical issues found during inspection.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $500
Moderate
• Ford F-250
• Chevrolet Silverado 2500
• Ram 2500
• Regularly inspect the reductant system components.
• Ensure proper maintenance of the vehicle's exhaust system.
• Use high-quality Diesel Exhaust Fluid (DEF).
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle if performance issues are noticeable.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
The P24FF code is relatively uncommon and typically occurs in diesel vehicles with selective catalytic reduction systems.
Moderate – Addressing this issue can prevent further emissions-related problems.
Ignoring emissions-related issues can lead to failing emissions tests and potential fines.
• Vehicle at operating temperature
• Engine running
The reductant temperature sensor is typically located near the DEF tank or along the DEF line.
Q: Can I drive with a P24FF code?
A: It's not recommended as it could lead to increased emissions and potential engine performance issues.
Q: How often should the reductant system be checked?
A: Regular maintenance checks should be performed according to the vehicle's service schedule.
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