How do wideband sensors work

For other fuel type stoich points we have a table at the bottom to help you out. So lowering the A racer may use a traditional pump gas but want their ratio to have more fuel added to boost their power output. The ECU uses multiple tables to determine how long to keep the injectors on, which is represented as the injector duty cycle.

How O2 Sensors Work: A Science Lesson O2 sensors are installed in the exhaust and were created to measure oxygen levels within the exhaust. They do this by allowing outside air to come into the sensor that is then heated to charge the ions to create voltage. The difference between the oxygen in the sensor and the oxygen in the exhaust is what determines how much voltage is produced. Your factory Honda ECU uses the output from a narrowband oxygen sensor to adjust fuel trim based on engine operating conditions and environment.

The ECU attempts to keep the engine operating around This is where the advantage of a wideband O2 sensor shines!

Accuracy is top priority. Unfortunately, the symptoms of a slow or even a dead sensor are not always obvious to the vehicle owner. Some symptoms of failed oxygen sensors are:. An oxygen sensor can fail prematurely if it becomes contaminated with phosphorus from excessive oil consumption, silicone from internal coolant leaks, using silicone sealant in the engine and some over-the-counter fuel additives.

Even a small amount of poorly refined gasoline can affect an oxygen sensor. Environmental factors such as road splash, salt, oil and dirt can also cause a sensor to fail — as can thermal shock, mechanical stress, or mishandling. However as required by vehicle manufacturers, Bosch sensors are designed and tested with these conditions in mind. Select your vehicle. This makes it better suited to today's low emission engines, and also for tuning performance engines.

Another difference is that the sensor's output voltage is converted by its internal circuitry into a variable current signal that can travel in one of two directions positive or negative. The PCM sends a control reference voltage typically 3.

There is a flat ceramic strip inside the protective metal nose cone on the end of the sensor. The ceramic strip is actually a dual sensing element that combines a "Nerst effect" oxygen pump and "diffusion gap" with the oxygen sensing element.

All three are laminated on the same strip of ceramic. Exhaust gas enters the sensor through vents or holes in the metal shroud over the tip of the sensor and reacts with the dual sensor element. Oxygen diffuses through the ceramic substrate on the sensor element.