However, if there is too much air and not enough fuel, the engine is said to be “running lean”. And, give off a burning effect, to the eyes and will make black smoke.
It will have a gassy or rotten egg smell, from the exhaust. What Should We Check, When We Have Those Rich Or Lean Engine Codes ? Basic Oxygen (O2) Sensor Codes So, if there is too much fuel and not enough air, the engine is said to be “running rich”. Rich Or Lean Engine Codes, What To Check All of the systems must be operating correctly, for the engine to function properly and have normal combustion. Consequently, these sensors are part of other systems, that operate together, to make the engine run efficiently. So, there are other sensors, while not directly attached to the (ECU), that do affect the information. Names for others sensors or computers may include: There may be as many as 20 sensors, feeding information to the vehicle (ECU). So, it is important to remember that today’s vehicles, are controlled by computers and sensors.
The Oxygen Sensor, also known as just (O2) sensor, is a wear item and does fail over time.
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