Acura RLX 2014-2020 Emissions & Sensors Specifications

The 2014-2020 Acura RLX features a range of emissions sensors, including oxygen sensors, nitrogen oxide (NOx) sensors, and exhaust gas temperature sensors. These sensors are designed to work with the 3.5L V6 engine and are compatible with the vehicle's SH-AWD system. The oxygen sensors are of the heated wire type, ensuring accurate readings across various driving conditions. The NOx sensors monitor emissions to meet EPA standards, and the exhaust gas temperature sensors help optimize catalytic converter performance. These sensors are calibrated to work seamlessly with the engine control module (ECM) for precise emissions control.

Regular maintenance for the emissions sensors on the 2014-2020 Acura RLX includes periodic inspections every 30,000 miles. It is recommended to avoid using fuel additives that may contain silicon-based compounds, as they can contaminate the sensors. Additionally, the oxygen sensors should be replaced every 100,000 miles or as specified by the manufacturer. Proper functioning of these sensors is critical for maintaining fuel efficiency, performance, and emissions compliance.

To replace an emissions sensor on the 2014-2020 Acura RLX, start by warming up the engine to ensure the sensor is at operating temperature. Locate the sensor, which is typically found in the exhaust system near the catalytic converter. Use a wrench to remove the sensor, taking care not to damage the wiring harness. Install the new sensor by hand-tightening it first, then torque it to the manufacturer's specifications (usually around 30-40 ft-lbs). Reconnect the electrical connector and clear any trouble codes using an OBD-II scanner. Always refer to the service manual for specific instructions and torque specifications.

If the Check Engine Light illuminates, use an OBD-II scanner to retrieve the trouble code. Common codes for faulty emissions sensors include P0130-P0135 for oxygen sensors and P0200-P0203 for NOx sensors. Inspect the sensor for physical damage, corrosion, or contamination. Check the wiring harness for any signs of damage or loose connections. Compare the sensor's voltage reading to the manufacturer's specifications using a multimeter. If the sensor is faulty, replace it with a genuine Acura part to ensure compatibility and performance.

To optimize the performance of the emissions sensors, ensure the vehicle is properly maintained, including regular oil changes and air filter replacements. Avoid aggressive driving habits that can cause excessive heat buildup in the exhaust system. Use high-quality fuel that meets the manufacturer's specifications to prevent contamination of the sensors. Periodically clean the mass airflow sensor and ensure the catalytic converter is functioning properly. Regularly updating the ECM software can also improve sensor accuracy and overall emissions system performance.