Upstream Oxygen Sensor

The A-Premium PRMOS155C is an oxygen sensor engineered to be a vital component in your vehicle's emissions and engine management system. Oxygen sensors, also known as O2 sensors, are crucial for monitoring the amount of unburned oxygen in your exhaust system. By accurately measuring these levels, the PRMOS155C helps your vehicle's computer regulate the optimal air-fuel mixture, directly impacting engine performance, fuel economy, and the reduction of harmful emissions. The goal is to restore proper function to your emissions control system and maintain efficient engine operation. A malfunctioning oxygen sensor can lead to decreased fuel efficiency, increased emissions, and potentially trigger check engine lights or other diagnostic trouble codes.