AutoCodes – Ford – P249E Ford

P249E Ford Code - Closed Loop Reductant Injection Control At Limit - Flow Too High

Quick Answer

Some manufacturers are now using a Diesel Exhaust Fluid (DEF) system commonly called a Selective Catalytic Reduction (SCR) system to reduce harmful Oxides of Nitrogen (NOx). Common causes include Exhaust Leaks, Fuel contamination, Faulty Diesel Particulate Filter (DPF). Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P249E Ford indicates Closed Loop Reductant Injection Control At Limit - Flow Too High.
Common causes: Common causes include Exhaust Leaks, Fuel contamination, Faulty Diesel Particulate Filter (DPF).
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 20,714

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P249E Ford Description

Some manufacturers are now using a Diesel Exhaust Fluid (DEF) system commonly called a Selective Catalytic Reduction (SCR) system to reduce harmful Oxides of Nitrogen (NOx). The diesel exhaust fluid is a Urea based solution of approximately 32% Urea and 64% distilled water. The solution is injected into the exhaust gas stream upstream of the SCR catalyst. Once in the exhaust system it decomposes and becomes Ammonia (NH3) and Carbon dioxide (CO2). Within the catalyst, the NH3 and CO2 react with the Nox to create Oxygen (O2) and harmless Nitrogen (N2).
The system requires a storage tank for the diesel exhaust fluid, a pump with integrated level sensor, pressure sensor and fluid quality sensor, an injector fitted to the exhaust system, fluid heater and the catalyst. Sensors can also be fitted close to the SCR catalyst to monitor temperature during regeneration.
The system is closely monitored for correct operation as failure of the system will have a large impact on vehicle exhaust gas emissions of oxides of Nitrogen.

OBDII Code P249E Ford - Closed Loop Reductant Injection Control At Limit - Flow Too High - AutoCodes.com — P249E Ford Code - Closed Loop Reductant Injection Control At Limit - Flow Too High

What does this mean?

What are the Possible Causes of the DTC P249E Ford?

Exhaust Leaks
Fuel contamination
Faulty Diesel Particulate Filter (DPF)
Faulty NOx Sensor
Diesel Exhaust Fluid
Faulty Selective Catalyst Reduction (SCR) Catalyst

How to Fix the DTC P249E Ford?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P249E Ford code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need Help with the Code?

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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.

Frequently Asked Questions about P249E Ford Code

1. What are the common symptoms of OBDII code P249E in a Ford vehicle?

- Common symptoms include the check engine light being illuminated, reduced engine performance, and potential exhaust system issues.

2. What can cause the OBDII code P249E to trigger in a Ford vehicle?

- This code is typically triggered by a malfunction in the closed-loop reductant injection control system, often due to a high flow rate of the reductant being detected.

3. How serious is the OBDII code P249E in a Ford vehicle?

- While the vehicle may still be driveable with this code, it can lead to increased emissions, reduced fuel efficiency, and potential damage to the exhaust system if left unresolved.

4. What are some possible repair tips for addressing OBDII code P249E in a Ford vehicle?

- Repair tips may include checking the reductant injection system for leaks or blockages, inspecting the reductant injector for proper operation, and verifying the integrity of related sensors.

5. Can I continue to drive my Ford vehicle with the OBDII code P249E present?

- It is generally not recommended to continue driving the vehicle with this code active, as it can lead to increased emissions and potential long-term damage to the engine or exhaust system.

6. How can I reset the OBDII code P249E in a Ford vehicle?

- The code can be reset using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes. However, it is important to address the underlying issue causing the code to prevent it from reoccurring.

7. Is it possible to prevent the OBDII code P249E from appearing in my Ford vehicle?

- Regular maintenance of the reductant injection system, including ensuring proper fluid levels and addressing any leaks promptly, can help prevent this code from triggering.

8. Can a DIY enthusiast address the OBDII code P249E in a Ford vehicle?

- Depending on the specific issue causing the code, some DIY enthusiasts may be able to address it themselves by following repair guides or seeking assistance from automotive forums.

9. How long does it typically take to repair the OBDII code P249E in a Ford vehicle?

- The repair time can vary depending on the exact cause of the code and the availability of parts. It is recommended to consult a professional mechanic for a more accurate estimate.

10. Will the OBDII code P249E in a Ford vehicle affect its overall performance?

- Yes, this code can impact the vehicle's performance by potentially reducing engine power, increasing emissions, and causing other related issues if not addressed promptly.