AutoCodesAudi – P1039 Audi

P1039 Audi Code - Nitrogen Oxides Sensor Short Circuit

Quick Answer

The Engine Control Module (ECM) monitors the Nitrogen Oxides (NOx) Sensor. Common causes include Faulty Nitrogen Oxides (NOx) Sensor, Nitrogen Oxides Sensor harness is open or shorted, Nitrogen Oxides 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
P1039 Audi indicates Nitrogen Oxides Sensor Short Circuit.
Common causes
Common causes include Faulty Nitrogen Oxides (NOx) Sensor, Nitrogen Oxides Sensor harness is open or shorted, Nitrogen Oxides 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 4,986
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 19, 2022
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Code P1039 Audi Description

The Engine Control Module (ECM) monitors the Nitrogen Oxides (NOx) Sensor. The ECM sets the Diagnostic Trouble Code (DTC) when the Nitrogen Oxides (NOx) Sensor is not to factory specifications.
OBDII Code P1039 Audi - Nitrogen Oxides Sensor Short Circuit - AutoCodes.com
P1039 Audi Code - Nitrogen Oxides Sensor Short Circuit

What are the Possible Causes of the DTC P1039 Audi?

  • Faulty Nitrogen Oxides (NOx) Sensor
  • Nitrogen Oxides Sensor harness is open or shorted
  • Nitrogen Oxides Sensor circuit poor electrical connection

How to Fix the DTC P1039 Audi?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1039 Audi 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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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 P1039 Audi Code

What does OBDII code P1039 mean for an Audi?

Code P1039 indicates a short circuit issue in the nitrogen oxides (NOx) sensor, which monitors NOx emissions from the vehicle's exhaust system.

What are the common symptoms of code P1039 in an Audi?

Symptoms may include the check engine light turning on, reduced fuel efficiency, possible engine performance issues, and higher emissions.

What causes the P1039 code in an Audi?

The main causes are a damaged NOx sensor, wiring issues such as shorts or corrosion, or problems with the sensor’s electrical connectors.

Can I drive my Audi with the P1039 code?

While the car may still be drivable, it’s not advisable to ignore this code as it can lead to increased emissions and potential damage to other components over time.

How is the P1039 code diagnosed in an Audi?

A mechanic will use an OBDII scanner to narrow down the issue, inspect the NOx sensor, wiring, and connectors for damage, and test the electrical circuit.

What repairs are typically needed for the P1039 code?

Repairs may include replacing the NOx sensor, repairing or replacing damaged wiring, or cleaning/replacing faulty connectors.

How much does it cost to fix the P1039 code on an Audi?

The repair cost can vary, but replacing the NOx sensor typically costs between $300 and $700, depending on the model and labor charges.

Can a faulty NOx sensor lead to other problems?

Yes, a malfunctioning NOx sensor can affect emissions control, fuel efficiency, and engine performance over time.

How can I prevent the P1039 code from occurring?

Regular maintenance, including inspecting wiring and connectors for damage, and addressing issues promptly, can help prevent this code.

Can I clear the P1039 code without fixing the issue?

Clearing the code without resolving the underlying issue may temporarily turn off the check engine light, but the problem will likely return and worsen.

Discuss the causes and fixes for P1039 Audi OBDII Code

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