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P1924 Ford Code - Fuel Additive Level Circuit Low

Quick Answer

The P1924 Ford code indicates a problem with the fuel additive level circuit being too low. Common causes include Faulty DEF Level Sensor: The sensor that measures the level of DEF in the tank may be malfunctioning, providing incorrect readings to the vehicle's computer, Wiring Issues: A damaged or corroded wiring harness connected to the DEF level sensor could be causing a poor connection or signal disruption, Low DEF Fluid: If the DEF tank is actually low on fluid, it could trigger this code and indicate the need for a refill. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1924 Ford indicates Fuel Additive Level Circuit Low.
Common causes
Common causes include Faulty DEF Level Sensor: The sensor that measures the level of DEF in the tank may be malfunctioning, providing incorrect readings to the vehicle's computer, Wiring Issues: A damaged or corroded wiring harness connected to the DEF level sensor could be causing a poor connection or signal disruption, Low DEF Fluid: If the DEF tank is actually low on fluid, it could trigger this code and indicate the need for a refill.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P1924 Ford Description

The P1924 Ford code indicates a problem with the fuel additive level circuit being too low. In modern vehicles, many diesel engines are equipped with a Selective Catalytic Reduction (SCR) system to reduce harmful emissions. This system requires a special urea-based fluid, known as diesel exhaust fluid (DEF), to be injected into the exhaust stream. The vehicle's onboard computer monitors the level of DEF in the tank using a sensor in the tank or in the delivery system.

OBDII Code P1924 Ford - Fuel Additive Level Circuit Low
P1924 Ford Code - Fuel Additive Level Circuit Low

Common Causes of P1924 Ford

  1. Faulty DEF Level Sensor: The sensor that measures the level of DEF in the tank may be malfunctioning, providing incorrect readings to the vehicle's computer.
  2. Wiring Issues: A damaged or corroded wiring harness connected to the DEF level sensor could be causing a poor connection or signal disruption.
  3. Low DEF Fluid: If the DEF tank is actually low on fluid, it could trigger this code and indicate the need for a refill.
  4. Defective SCR System: A problem with the SCR system itself, such as a clogged injector or malfunctioning pump, could lead to issues with the fuel additive level circuit.

Symptoms of P1924 Ford

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Reduced Engine Performance: The vehicle may experience a decrease in power and acceleration due to the engine management system restricting performance.
  3. Increased Emissions: A malfunctioning fuel additive level circuit can lead to higher emissions being released by the vehicle.
  4. Rough Idling: The engine may idle roughly or inconsistently if the fuel additive level circuit is not operating correctly.

How to Fix P1924 Ford

  1. Check DEF Fluid Level: Begin by checking the level of DEF fluid in the tank and refilling if necessary.
  2. Inspect Wiring: Inspect the wiring harness connected to the DEF level sensor for any damage or corrosion, and repair or replace as needed.
  3. Test DEF Level Sensor: Test the DEF level sensor to ensure it is providing accurate readings, and replace if found to be faulty.
  4. Clear Codes: After repairing the issue, use a diagnostic tool to clear the code and reset the check engine light.

Cost to Fix P1924 Ford

The cost of repairing a P1924 Ford code can vary depending on the specific cause of the issue. In general, the cost of parts for this repair could range from $50 to $200, with labor costs adding an additional $100 to $200. This brings the total estimated cost to between $150 and $400. However, as mentioned earlier, labor rates at auto repair shops can vary significantly, so it's best to check with local shops for a more accurate estimate based on your location and vehicle.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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