Exhaust Gas Temperature Feedback Control
WARNING: This page is about a different car, the 2019 Nissan Armada and 2018 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.
The exhaust gas temperature feedback system is intended for the improvement of fuel efficiency, the reduction in exhaust gas (CO and HC), and the protection of parts. This system monitors the upstream temperature of catalyst by using an exhaust gas temperature sensor and lowers the combustion temperature to prevent damage to the exhaust system related parts by increasing fuel injection when exhaust gas becomes hot.