AutoCodes – Audi – P1320 Audi

P1320 Audi Code - Knock Sensor 2 Circuit Short To Ground

Quick Answer

When the diagnostic trouble code P1320 is triggered in an Audi vehicle, it indicates that there is a problem with the Knock Sensor 2 Circuit being shorted to ground. Common causes include Faulty Knock Sensor 2, Knock Sensor 2 harness is open or shorted, Knock Sensor 2 circuit poor electrical connection. 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
P1320 Audi indicates Knock Sensor 2 Circuit Short To Ground.
Common causes
Common causes include Faulty Knock Sensor 2, Knock Sensor 2 harness is open or shorted, Knock Sensor 2 circuit poor electrical connection.
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 4,243
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 02, 2025
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Code P1320 Audi Description

When the diagnostic trouble code P1320 is triggered in an Audi vehicle, it indicates that there is a problem with the Knock Sensor 2 Circuit being shorted to ground. The knock sensor is a crucial component in the engine management system that detects abnormal combustion, often referred to as engine knock or detonation. This sensor plays a vital role in ensuring optimal engine performance and preventing potential damage to the engine.
OBDII Code P1320 Audi - Knock Sensor 2 Circuit Short To Ground - AutoCodes.com
P1320 Audi Code - Knock Sensor 2 Circuit Short To Ground

What are the Possible Causes of the DTC P1320 Audi?

  • Faulty Knock Sensor 2
  • Knock Sensor 2 harness is open or shorted
  • Knock Sensor 2 circuit poor electrical connection

How to Fix the DTC P1320 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1320 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.

Need more information about the P1320 Audi 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 P1320 Audi Code

1. What does the OBDII code P1320 mean on an Audi?

P1320 indicates a "Knock Sensor 2 Circuit Short to Ground," meaning there is an electrical issue with the second knock sensor's wiring or connection.

2. What are the symptoms of code P1320 on an Audi?

Symptoms may include poor engine performance, reduced fuel efficiency, hesitation during acceleration, and possibly engine knocking.

3. What causes code P1320 on an Audi?

Common causes include damaged or faulty knock sensor wiring, a short to ground in the circuit, or a defective knock sensor.

4. Can driving with code P1320 damage my Audi?

Yes, prolonged driving can lead to engine damage if knocking occurs and isn't detected due to the faulty sensor.

5. How do you diagnose code P1320 on an Audi?

Diagnosis involves checking the knock sensor wiring and connections for damage, testing the sensor itself, and inspecting the circuit for shorts to ground.

6. How do you fix code P1320 on an Audi?

Repairs may involve replacing the knock sensor, repairing or replacing damaged wiring, or addressing any grounding issues in the circuit.

7. Is replacing the knock sensor the only solution for code P1320?

No, sometimes the issue is with the wiring or connectors, and repairing these may resolve the code without replacing the sensor.

8. Can a faulty knock sensor cause poor fuel economy?

Yes, a faulty knock sensor can lead to improper ignition timing, which may reduce fuel efficiency.

9. How much does it cost to fix code P1320 on an Audi?

Repair costs vary but typically range from $150 to $500, depending on whether the sensor, wiring, or both need replacement.

10. Can I clear code P1320 without fixing the issue?

Clearing the code without addressing the underlying problem will likely cause the code to return and may lead to further engine issues.

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