Turbo Sensor Failure Causing Power Loss and Strange Noises

As someone with moderate experience working on GM vehicles, I had a similar issue with my 2009 Buick Enclave. The symptoms you describe match what I encountered, engine light, reduced power, and those distinct whistling sounds. The charge sensor malfunction can often be traced to faulty wiring connections rather than the sensor itself. In my case, the automotive sensor issue was resolved by fixing damaged wiring and a loose connector near the temperature sensor assembly. The workshop discovered corrosion had affected the connection points, causing inconsistent temperature readings. The repair involved: 1. Testing the temperature sensor circuit 2. Cleaning connector terminals 3. Replacing damaged wiring sections 4. Recalibrating the engine sensor system Total cost came to 95 Euro, which included parts and labor. The temperature fluctuations stopped immediately after the repair, and engine performance returned to normal. To provide more specific guidance, could you share: Current mileage on your Terraza, Any recent repairs or maintenance, Specific error codes from the scanner, Whether the issue occurs more during cold or hot weather This would help determine if your situation matches my experience or might need a different approach.

Just had my 65072 KM service done last month. The wiring diagnosis was spot on, exactly what was happening with my vehicle. The air temperature readings were all over the place due to corroded connections. After cleaning and replacing the wiring near the air intake, the whistling stopped completely. The temperature gauge now shows steady readings and the engine power is back to normal. The repair cost me about 250 Euro in parts and labor, but it was worth fixing before it caused more serious issues. For anyone else seeing similar symptoms, make sure to check both the sensor and the surrounding wiring. A simple connection problem can mimic a bad sensor.

Thanks for the update on your Terraza repair. It confirms what I found on my Enclave, these temperature sensor issues often trace back to wiring rather than the sensor unit itself. The higher repair cost you paid sounds about right since they had to replace more wiring sections than in my case. The steady temperature gauge readings after the fix match my experience too. Once those connections were cleaned and replaced, the airflow sensor started getting accurate data again. Makes sense the whistling stopped, proper sensor readings let the system maintain correct air pressure. Something worth mentioning, after my repair, I started checking the engine sensor connections during regular maintenance. A quick visual inspection of the temperature sensor area can catch corrosion early. This preventive step has helped avoid similar issues from popping up again. Glad you got it sorted before winter when faulty temperature readings can cause more problems with engine performance. Your tip about checking both sensor and wiring is spot on, saved me from unnecessarily replacing the entire sensor unit.

Thanks to everyone who provided insights. The symptoms I initially noticed, whistling sounds, engine light, and reduced power, turned out to be directly linked to corroded wiring near the air intake system. Just wanted to close the loop on my repair experience. After following the suggestions here, our mechanic found multiple connection issues affecting the air temperature sensor readings. The repair involved cleaning corroded terminals and replacing damaged wiring sections around the airflow sensor. Total cost was 250 for parts and labor. The results were immediate, no more whistling sounds during acceleration, accurate temperature gauge readings, and restored engine power. What seemed like a major problem was resolved without needing to replace the actual sensor unit. For others who might face similar issues with their Terraza, definitely have the wiring checked before assuming the engine sensor itself is faulty. Regular inspection of these connections during maintenance could prevent similar problems from developing.