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 noticed that the temperature of the fluid in the special tank that helps clean the exhaust isn't matching up with the fuel temperature like it expects.
The vehicle's control module detects a discrepancy between the reductant tank temperature and the fuel temperature, which should correlate under normal conditions.
The reductant tank, which stores Diesel Exhaust Fluid (DEF), has a temperature sensor. This sensor should report a temperature that correlates with the fuel temperature sensor readings. If the readings differ beyond a certain threshold, the P24F3 code is triggered.
• Check Engine Light is on
• Possible reduction in engine performance
• Increased emissions
• Vehicle may enter limp mode
• Faulty reductant tank temperature sensor
• Faulty fuel temperature sensor
• Wiring issues or poor connections
• Defective control module
Reductant: A substance used to reduce emissions in diesel engines.
DEF: Diesel Exhaust Fluid, a solution used in the reductant system.
• Scan the vehicle for codes and freeze frame data.
• Inspect the wiring and connections for the temperature sensors.
• Test the reductant tank temperature sensor.
• Test the fuel temperature sensor.
• Replace the reductant tank temperature sensor if faulty.
• Replace the fuel temperature sensor if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the control module if necessary.
• OBD-II scanner
• Digital multimeter
• Temperature sensor tester
• Wiring diagram
$150 - $500
Moderate
• Ford F-250
• Chevrolet Silverado
• Ram 2500
• Regularly check and maintain the DEF system.
• Ensure proper connections and wiring integrity.
• Use quality DEF fluid.
Sensor Issue
• Have the vehicle inspected by a professional if the Check Engine Light comes on.
• Do not ignore the warning as it can lead to increased emissions.
• Regular maintenance can prevent such issues.
Check with the vehicle manufacturer as emissions-related components may be covered under warranty.
This code has become more common with the increased use of DEF systems in diesel engines to meet emissions standards.
Moderate – Should be addressed to prevent emissions issues and potential engine performance problems.
Ignoring emissions-related issues can lead to failing emissions tests and potential fines.
• Engine at normal operating temperature
• Vehicle in a safe, stationary position
The reductant tank is typically located near the rear of the vehicle, while the fuel temperature sensor is usually near the fuel rail or fuel line.
Q: Can I drive with a P24F3 code?
A: It's possible to drive, but it's not recommended as it may affect emissions and engine performance.
Q: How does the reductant system work?
A: The reductant system uses Diesel Exhaust Fluid (DEF) to reduce emissions by converting harmful nitrogen oxides into nitrogen and water.
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