AutoCodes – Ford – P249D Ford

P249D Ford Code - Closed Loop Reductant Injection Control At Limit - Flow Too Low

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: P249D Ford indicates Closed Loop Reductant Injection Control At Limit - Flow Too Low.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 9,312

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P249D 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 P249D Ford - Closed Loop Reductant Injection Control At Limit - Flow Too Low - AutoCodes.com — P249D Ford Code - Closed Loop Reductant Injection Control At Limit - Flow Too Low

What does this mean?

What are the Possible Causes of the DTC P249D 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 P249D 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 P249D 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.

Need more information about the P249D Ford code?

Need more information on how to fix the P249D Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P249D Ford code diagnosed by a professional: Find a repair shop in your area

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 P249D Ford Code

1. What are the common symptoms of OBDII code P249D in a Ford vehicle?

- Common symptoms include the check engine light being illuminated, reduced engine performance, and potentially increased fuel consumption.

2. What does the OBDII code P249D in a Ford indicate?

- The code indicates a problem with the Closed Loop Reductant Injection Control system, specifically that the flow is too low.

3. What are possible causes of the OBDII code P249D in a Ford?

- Possible causes include a faulty reductant injector, clogged reductant lines, issues with the reductant pump, or a malfunctioning control module.

4. How can I diagnose the OBDII code P249D in my Ford?

- Diagnosing the code typically involves using a scan tool to retrieve the code, inspecting the reductant injection system components, and testing the functionality of the injectors and pump.

5. Can I continue driving my Ford with the OBDII code P249D present?

- It is not advisable to continue driving with the code present, as it can lead to reduced engine performance and potentially cause damage to the emissions control system.

6. How can I repair the OBDII code P249D in my Ford?

- Repair options may include replacing the faulty reductant injector, cleaning or replacing clogged reductant lines, checking and potentially replacing the reductant pump, or addressing any issues with the control module.

7. Is it possible to clear the OBDII code P249D in a Ford without repairing the issue?

- While it is possible to clear the code with a scan tool, it is not recommended as the underlying problem causing the code will persist and may lead to further issues.

8. How much does it typically cost to repair the OBDII code P249D in a Ford?

- The cost of repair can vary depending on the specific cause of the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can I prevent the OBDII code P249D from appearing in my Ford?

- Regular maintenance of the reductant injection system, using high-quality diesel exhaust fluid (DEF), and addressing any issues promptly can help prevent the code from appearing.

10. How long does it take to repair the OBDII code P249D in a Ford?

- The repair time can vary depending on the exact cause of the code and the availability of parts, but it may take a few hours to a full day for a mechanic to diagnose and repair the issue.