The Ford P244c diagnostic trouble code (DTC) indicates a problem with your diesel vehicle’s exhaust system, specifically that the exhaust temperature is too low for Diesel Particulate Filter (DPF) regeneration. This article explains the causes, symptoms, and common problems associated with this code, specifically for Ford vehicles.
DPF Regeneration Process
How the DPF System Works in Your Ford
Your Ford diesel engine uses a DPF to trap soot and other harmful particles from the exhaust gas. To clean the DPF, a process called regeneration is initiated. Regeneration burns off the accumulated soot, converting it into harmless ash. This process requires high exhaust temperatures, typically achieved through engine operation and sometimes aided by injecting Diesel Exhaust Fluid (DEF) into the exhaust stream. The DEF helps raise the temperature of the DPF to a level where the soot can be burned off effectively. When the exhaust temperature remains too low, the regeneration process cannot occur, triggering the P244C code.
Common Causes of P244C in Ford Vehicles
Several factors can contribute to low exhaust temperatures and trigger the Ford P244C code:
- Faulty DEF Injector: A malfunctioning DEF injector may not deliver the correct amount of DEF into the exhaust stream, hindering the temperature increase needed for regeneration. This is a common issue in Ford diesel vehicles.
- Exhaust Gas Temperature (EGT) Sensor Problems: An inaccurate or failing EGT sensor can provide incorrect temperature readings to the Engine Control Module (ECM), leading to a misdiagnosis of low exhaust temperature and triggering the P244C.
- Exhaust Leaks: Leaks in the exhaust system can cause a drop in pressure and temperature, preventing the DPF from reaching the required temperature for regeneration. Even small leaks can contribute to this issue.
- Clogged DPF: Excessive soot buildup in the DPF can restrict exhaust flow and lower temperatures, making regeneration difficult or impossible. In some cases, a forced regeneration by a qualified technician may be necessary.
- Faulty Thermostat: A malfunctioning engine thermostat that keeps the engine running too cool can also contribute to lower exhaust gas temperatures.
Symptoms of P244C in Ford Vehicles
While the P244C code itself might not directly cause noticeable driving issues, it signals a problem that can lead to further complications. Common symptoms include:
- Illuminated Check Engine Light: This is the most common indicator of a DTC, including P244C.
- Decreased Fuel Economy: A clogged DPF and failed regeneration attempts can lead to reduced fuel efficiency.
- Reduced Engine Performance/Limp Mode: In severe cases, the ECM may put the engine into “limp mode” to prevent damage, limiting power and speed.
- Increased Exhaust Smoke: You might notice increased black smoke from the exhaust, indicating incomplete combustion due to DPF issues.
Diagnosing and Fixing Ford P244C
Diagnosing the root cause of P244C requires specialized diagnostic tools and expertise. A qualified Ford technician will likely:
- Retrieve Diagnostic Trouble Codes: Using a code reader, they’ll identify all stored DTCs, including P244C and any related codes.
- Inspect the Exhaust System: A thorough inspection of the exhaust system will help identify leaks, damage, or restrictions.
- Test Sensors: The EGT sensor and other related sensors will be tested for proper operation.
- Check DEF System: The DEF injector, tank, and fluid lines will be examined for issues.
- Perform Forced DPF Regeneration: If the DPF is clogged, a forced regeneration might be attempted using specialized equipment.
Conclusion
The Ford P244C code signifies a potentially serious issue with your diesel vehicle’s emissions system. Addressing the underlying cause promptly is crucial to prevent further damage and maintain optimal vehicle performance. Consulting a qualified Ford technician is recommended for accurate diagnosis and repair. They possess the necessary expertise and tools to effectively resolve this issue and ensure the longevity of your vehicle’s DPF system.
