Audi DTC P1799 – Output Speed Sensor 2 Circuit Rpm too High
DTC P1799 meaning on Audi
DTC P1799 on an Audi indicates an issue with the Output Speed Sensor 2 Circuit, specifically that the RPM is too high. This sensor is responsible for monitoring the rotational speed of the output shaft of the transmission. When the RPM is detected to be excessively high, it triggers this diagnostic trouble code.
Audi DTC P1799 symptoms
Symptoms of DTC P1799 on an Audi may include erratic shifting behavior, harsh shifting, transmission slipping, or the transmission going into limp mode. The vehicle may also experience a decrease in fuel efficiency and overall performance.
Audi DTC P1799 causes
The most common causes of DTC P1799 on an Audi include a faulty Output Speed Sensor 2, damaged wiring or connectors in the sensor circuit, or issues with the transmission control module. Additionally, low transmission fluid levels or contaminated fluid can also lead to this fault code.
Audi DTC P1799 seriousness
DTC P1799 should be taken seriously as it can lead to further damage to the transmission if left unresolved. Ignoring this code may result in more severe transmission issues and potentially costly repairs down the line. It is recommended to address this problem promptly to prevent any long-term damage.
How to diagnose DTC P1799 on Audi
To diagnose DTC P1799 on an Audi, a mechanic would typically start by using a diagnostic scanner to retrieve the fault code and perform a thorough inspection of the Output Speed Sensor 2 and its circuit. They would check for any visible damage to the sensor, wiring, or connectors. Additionally, testing the sensor’s resistance and checking the transmission fluid level and condition may also be necessary.
How to fix DTC P1799 on Audi
Fixing DTC P1799 on an Audi usually involves replacing the faulty Output Speed Sensor 2 if it is determined to be the cause of the issue. Repairing or replacing any damaged wiring or connectors in the sensor circuit may also be necessary. Ensuring the transmission fluid is at the correct level and in good condition is essential. In some cases, reprogramming the transmission control module may be required.
How to erase DTC P1799 on Audi
Once the underlying issue causing DTC P1799 on an Audi has been resolved, the fault code can be cleared using a diagnostic scanner. This will erase the code from the vehicle’s memory and turn off the check engine light. It is important to verify that the repair was successful by driving the vehicle and rescanning for any remaining fault codes.
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