Audi DTC P1798 – Output Speed Sensor 2 Circuit Range/Performance
DTC P1798 meaning on Audi
The Diagnostic Trouble Code (DTC) P1798 for Audi refers to the Output Speed Sensor 2 Circuit Range/Performance issue. This code indicates that there is a problem with the output speed sensor 2 circuit in the vehicle’s transmission system. The output speed sensor is responsible for monitoring the rotational speed of the output shaft of the transmission.
Audi DTC P1798 symptoms
Symptoms of DTC P1798 on an Audi may include:
- Erratic shifting behavior
- Transmission slipping
- Harsh shifting
- Transmission stuck in one gear
- Illuminated Check Engine Light
Audi DTC P1798 causes
Common causes of DTC P1798 on an Audi include:
- Defective output speed sensor
- Wiring or connector issues in the output speed sensor circuit
- Internal transmission problems
- Faulty transmission control module
Audi DTC P1798 seriousness
The seriousness of DTC P1798 on an Audi depends on the underlying cause. Ignoring this issue can lead to further damage to the transmission system and potentially result in costly repairs. It is recommended to address this problem promptly to prevent any long-term issues.
How to diagnose DTC P1798 on Audi
To diagnose DTC P1798 on an Audi, a mechanic may perform the following steps:
- Use a diagnostic scanner to retrieve the fault codes
- Inspect the output speed sensor and its wiring for any visible damage
- Test the output speed sensor using a multimeter
- Check the transmission control module for any faults
How to fix DTC P1798 on Audi
To fix DTC P1798 on an Audi, the following steps may be taken:
- Replace the faulty output speed sensor
- Repair or replace any damaged wiring or connectors in the output speed sensor circuit
- Address any internal transmission issues if necessary
- If needed, replace the transmission control module
How to erase DTC P1798 on Audi
To erase DTC P1798 on an Audi, the fault codes can be cleared using a diagnostic scanner. After the necessary repairs have been made, the codes can be reset to see if the issue has been resolved. It is important to ensure that the root cause of the problem has been addressed before clearing the fault codes.
Recommended tools for Audi diagnostics
Explore our expert picks: The Best OBD2 Scanners for 2025
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.