AutoCodes – Ford – P2039 Ford

P2039 Ford Code - Reductant Injection Air Pressure Sensor 'A' Circuit Low

Quick Answer

The reductant system uses a selective reduction catalyst to improve exhaust emissions and fuel efficiency by injecting a reductant into the exhaust system. Common causes include Faulty Reductant Injection Air Pressure Sensor, Reductant Injection Air Pressure Sensor harness is open or shorted, Reductant Injection Air Pressure Sensor circuit poor electrical connection. 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: P2039 Ford indicates Reductant Injection Air Pressure Sensor 'A' Circuit Low.
Common causes: Common causes include Faulty Reductant Injection Air Pressure Sensor, Reductant Injection Air Pressure Sensor harness is open or shorted, Reductant Injection Air Pressure Sensor circuit poor electrical connection.
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.

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Code Popularity 2,871

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2039 Ford Description

The reductant system uses a selective reduction catalyst to improve exhaust emissions and fuel efficiency by injecting a reductant into the exhaust system. The reductant also referred to as diesel exhaust fluid is a 32.5% solution of urea in deionized water. The reductant system reduces Nitrogen Oxides (NOx) present in the exhaust stream to nitrogen and water.
The Reductant Injection Air Pressure Sensor sends voltage reading information to the Powertrain Control Module (PCM). The PCM interprets these readings as pressure or exhaust gas temperature. The code is set when the voltage sent from the sensor to the PCM is out of factory specifications.

OBDII Code P2039 Ford - Reductant Injection Air Pressure Sensor 'A' Circuit Low - AutoCodes.com — P2039 Ford Code - Reductant Injection Air Pressure Sensor 'A' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2039 Ford?

Faulty Reductant Injection Air Pressure Sensor
Reductant Injection Air Pressure Sensor harness is open or shorted
Reductant Injection Air Pressure Sensor circuit poor electrical connection
Faulty Reductant Pump Assembly

How to Fix the DTC P2039 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 P2039 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 P2039 Ford code?

Need more information on how to fix the P2039 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2039 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 P2039 Ford Code

1. What are the common symptoms of OBDII code P2039 in a Ford related to the Reductant Injection Air Pressure Sensor 'A' Circuit Low?

- Common symptoms include reduced engine performance, poor fuel efficiency, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P2039 in a Ford indicating an issue with the Reductant Injection Air Pressure Sensor 'A' Circuit Low?

- Possible causes may include a faulty reductant injection air pressure sensor, damaged wiring or connectors in the sensor circuit, or issues with the sensor power supply.

3. How can I diagnose the OBDII code P2039 in my Ford that points to a Reductant Injection Air Pressure Sensor 'A' Circuit Low problem?

- Diagnosis typically involves using a diagnostic scanner to retrieve the trouble codes, checking the sensor's wiring and connectors for damage, and testing the sensor itself for proper functionality.

4. Is it safe to continue driving my Ford with OBDII code P2039 indicating a Reductant Injection Air Pressure Sensor 'A' Circuit Low issue?

- It is not recommended to drive the vehicle for an extended period with this issue, as it can lead to reduced performance and potential damage to the engine or emissions system.

5. What are some repair tips for addressing OBDII code P2039 related to the Reductant Injection Air Pressure Sensor 'A' Circuit Low in a Ford?

- Repair tips may include replacing the faulty sensor, repairing damaged wiring or connectors, and clearing the trouble codes with a diagnostic scanner after completing the repairs.

6. Can a DIY enthusiast fix OBDII code P2039 in a Ford without professional help for the Reductant Injection Air Pressure Sensor 'A' Circuit Low issue?

- Depending on their skill level, a DIY enthusiast may be able to address this issue by following repair guides, but it is recommended to have a professional diagnose and repair the problem for accurate results.

7. How much does it typically cost to repair OBDII code P2039 related to the Reductant Injection Air Pressure Sensor 'A' Circuit Low in a Ford?

- The cost of repairs can vary depending on the specific cause of the issue, but it may involve expenses for parts, labor, and diagnostic fees, which can range from a few hundred to over a thousand dollars.

8. Can resetting the check engine light resolve OBDII code P2039 indicating a Reductant Injection Air Pressure Sensor 'A' Circuit Low problem in a Ford?

- Simply resetting the check engine light will not fix the underlying issue causing the trouble code. It is important to diagnose and address the root cause of the problem to prevent it from reoccurring.

9. How long does it typically take to repair OBDII code P2039 related to the Reductant Injection Air Pressure Sensor 'A' Circuit Low in a Ford?

- The repair time can vary based on the complexity of the issue and the availability of parts. In general, it may take a few hours to a full day for a professional technician to diagnose and repair the problem.

10. Are there any recalls or technical service bulletins related to OBDII code P2039 in Ford vehicles with issues concerning the Reductant Injection Air Pressure Sensor 'A' Circuit Low?

- It is recommended to check with the nearest Ford dealership or visit the National Highway Traffic Safety Administration (NHTSA) website for information on any recalls or technical service bulletins related to this specific OBDII code and sensor issue.