Seat Arona Transmission Fault Resolved

The symptoms you describe point to a potential issue with the transmission oil pressure sensor. Slipping gears, grinding noises, and the warning lights are common signs. Before replacing the sensor, it would be wise to check the transmission oil level. A low oil level can cause similar symptoms and trigger a sensor fault. Is there any evidence of fluid leakage?

Thank you for your prompt response. You mentioned verifying the transmission oil level. Could you explain the correct procedure for checking the oil level in this specific transmission? Are there any specific tools or precautions I should know about?

The procedure for checking transmission fluid levels can vary significantly depending on the specific transmission design. Some transmissions have a dipstick for easy level checking, while others require specialized tools and a specific procedure, often involving checking the level at a certain temperature. Given the complexity and potential for damage, I strongly recommend consulting a qualified technician to diagnose and fix the issue. Attempting repairs without proper knowledge could make the problem worse. It appears that your initial suspicion of low oil level is probably right and it triggered the sensor fault.

I took the car to a certified repair shop. The diagnosis confirmed a transmission oil pressure sensor fault, likely due to low oil level as you suspected. The sensor was replaced, the oil level was corrected, and the system was reset. The total repair cost was 365€. The car is now functioning correctly.