Acura TL 2009-2014 Emissions & Sensors Specifications

The 2009-2014 Acura TL features emissions sensors including oxygen sensors, a fuel tank pressure sensor, and an engine coolant temperature sensor. These sensors are designed to meet EPA and CARB emissions standards. The oxygen sensors are heated three-wire types, compatible with the 3.5L and 3.7L V6 engines. The fuel tank pressure sensor operates within a range of 0-30 kPa, and the engine coolant temperature sensor is a thermistor-type sensor with a resistance range of 10kΩ at 20°C. All sensors are designed for optimal performance with the PGM-FI fuel injection system.

Regular maintenance for emissions sensors in the 2009-2014 Acura TL includes periodic inspection of the oxygen sensors every 30,000 miles, cleaning or replacing the fuel tank pressure sensor if contaminated, and ensuring the engine coolant temperature sensor is free from corrosion. It is recommended to follow the factory maintenance schedule outlined in the owner's manual, which includes sensor checks at 15,000, 30,000, and 60,000-mile intervals. Proper maintenance ensures emissions compliance and optimal engine performance.

To replace an emissions sensor, start by disconnecting the battery to prevent any electrical surges. For oxygen sensors, locate the sensor near the exhaust manifold, disconnect the electrical connector, and use a wrench to remove the sensor. Install the new sensor by reversing the steps, ensuring it is properly seated and connected. For the fuel tank pressure sensor, remove the rear seat and access panel, then disconnect the electrical and vacuum connectors before replacing. Always refer to the service manual for specific instructions and torque specifications.

Common issues with emissions sensors include faulty readings, contamination, or electrical connectivity problems. Use an OBD-II scanner to retrieve trouble codes, which can help identify the specific sensor malfunctioning. Check for loose connections, corrosion, or damage to the sensor wiring. For oxygen sensors, look for signs of contamination from oil or coolant. For the fuel tank pressure sensor, inspect for debris or moisture in the sensor or vacuum lines. Replace any faulty sensors and clear the trouble codes using the OBD-II scanner.

To optimize emissions sensor performance, ensure proper engine tuning and maintain the recommended fuel quality. Regularly clean or replace the air filter to prevent contamination of the mass airflow sensor. Avoid using fuel additives that can damage oxygen sensors. Keep the engine coolant system well-maintained to prevent temperature sensor inaccuracies. Finally, use a high-quality scan tool to monitor sensor readings and ensure they are within factory specifications. Proper maintenance will help maintain emissions efficiency and engine performance.