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Most 4.0L engines with federal emissions have two oxygen sensors located on the exhaust pipe before the muffler. One sensor is mounted before the catalyst (upstream) and one is mounted after the catalyst (downstream). Most 4.0L engines with California emissions have four oxygen sensors. These are mounted in the exhaust manifold area. Two are upstream and two are downstream. There is an emissions label under the hood of the vehicle that identifies the emissions type.
Water vapor and carbon dioxide are the two main outputs from a jet engine.
the check engine light means you have something wrong with your emissions. it might be the two sensers on the exhaust pipe.
The 'Service Engine Soon' light is required by the OBD-II standard for vehicle systems. It is required to light when a malfunction occurs that will increase the emissions level of your vehicle. The 'Service Vehicle Soon' light is simply a safety item to tell you something is wrong, even if it's not engine or emissions related.
Because 2 stroke engines consume oil in their operation. This produces high levels of emissions and is unhealthy for people and the enviornment. $ stroke engines do not mix oild and fuel so their emissions are much lower.
2 spark plugs in the same cylinder improve combustion, reduce emissions and operating reliability of the engine.
The 2004 Jeep Liberty with a 3.7L engine has two catalytic converters. This is because the engine has two separate exhaust manifolds, each of which is connected to a separate catalytic converter. The two catalytic converters help to reduce the emissions produced by the engine, and they are located underneath the vehicle, near the exhaust system.
For a more efficient combustion of fuels also helps cut harmful emissions.
if its CA emissions, it will deifnately have two one bolted to the exhaust manifold and one not too far behind that one
Hybrid cars reduce harmful emissions that regular cars emit into the air. They also contain two engines, an electric engine and a gas engine, so that if one breaks, the other will keep you going until you can repair it.
4, two front and two rear, I recently had to change the rears anyway, since it was misreading its information and causing the service engine light to come on and they wouldn't pass my emissions inspection.
two thousand pounds