P0720 – Audi DTC

Audi DTC P0720 – Defective Output Speed Sensor, Defective Shift Solenoids, Defective Engine Coolant Temperature Sensor, Defective Valve Body, Dirty transmission fluid that restricts the hydraulic passages, Defective Output Speed Sensor wiring or connector

DTC P0720 meaning on Audi

DTC P0720 refers to a malfunction related to the output speed sensor in Audi vehicles. This diagnostic trouble code indicates that the Engine Control Module (ECM) has detected an issue with the signal from the output speed sensor, which is responsible for monitoring the transmission’s output speed. A faulty output speed sensor can lead to improper shifting and affect overall vehicle performance.

Audi DTC P0720 symptoms

Common symptoms associated with DTC P0720 may include:

• Erratic or harsh shifting of the transmission
• Transmission slipping or failing to engage
• Check Engine Light illuminated
• Reduced engine performance
• Increased fuel consumption

Audi DTC P0720 causes

Several factors can contribute to the occurrence of DTC P0720, including:

• Defective output speed sensor
• Defective shift solenoids
• Defective engine coolant temperature sensor
• Defective valve body
• Dirty transmission fluid that restricts hydraulic passages
• Faulty wiring or connector related to the output speed sensor

Audi DTC P0720 seriousness

The seriousness of DTC P0720 can vary, but it is generally considered a moderate to severe issue. If left unaddressed, it can lead to:

• Increased wear and tear on the transmission
• Potential transmission failure
• Unsafe driving conditions due to erratic shifting

How to diagnose DTC P0720 on Audi

To diagnose DTC P0720, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC P0720.
2. Inspect the output speed sensor and its wiring for any visible damage or corrosion.
3. Check the transmission fluid level and condition look for contamination or dirt.
4. Test the output speed sensor using a multimeter to ensure it is functioning correctly.
5. Examine the shift solenoids and valve body for any faults.
6. Clear the DTC and take the vehicle for a test drive to see if the code reappears.

How to fix DTC P0720 on Audi step-by-step instructions

To fix DTC P0720, follow these steps:

1. Identify and replace the defective output speed sensor if necessary.
2. Repair or replace any damaged wiring or connectors associated with the output speed sensor.
3. Change the transmission fluid if it is dirty or contaminated.
4. Inspect and replace any faulty shift solenoids.
5. Examine and repair the valve body if it is defective.
6. After repairs, clear the DTC using an OBD-II scanner.
7. Perform a test drive to ensure the issue is resolved and the code does not return.

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