2008 Acura TL 3.2 Fuel Trim Sensor P0108 and P2279 Code Diagnosis

You replaced all oxygen sensors, MAP sensor, and air intake hose, and cleaned the throttle body—these are common maintenance steps, but P0108 and P2279 typically point to a vacuum leak. Try the classic carburetor spray test to locate the source of the leak. This method involves spraying carb cleaner around potential vacuum lines while the engine is running to see where the engine responds (e.g., code clears or symptoms change). Watch this video for guidance: https://www.youtube.com/watch?v=mYa8rcHeN3A

My car has around 150,000 miles. The oxygen sensors were replaced due to age and performance decline. The air intake hose was cracked and needed replacement. I cleaned the throttle body thoroughly to remove carbon buildup. I also replaced the MAP sensor because it failed. I'm not familiar with the 'old school carb spray trick'—does anyone have a reliable source or step-by-step guide for that?

I don't personally know about the carb spray method, but you might want to check if the vacuum line connected to the MAP sensor is intact and properly seated. A loose or cracked vacuum hose could cause both P0108 and P2279. Inspect that connection carefully—sometimes a small leak in the vacuum path can trigger these codes even after replacing sensors.

My car has 135,000 miles. I replaced the input speed sensor and performed a drive test, but the issue returned. The same symptoms persist—code P2279 reappears after driving. What could be wrong? Is it possible that the problem lies in the engine control module or another sensor besides vacuum leaks?