Question about 2007 Kia Sedona LX Minivan

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P0174 is showing on my 2007 kia sedona but all hose are good

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The Code means system is lean on Bank 2. This is describing a lean fuel mix or an air leak in the Intake Manifold.

The air to fuel ratio is a comparison of how much air is present compared to how much fuel is present. If there is more or less of one or the other the ratio will change.

So either your injectors are not delivering enough fuel on 1/2 of the engine or you are getting more air on one side of the engine. Some engines have internal parts in the Intake manifold to change the air flow chambers. Some are called manifold runners and they do stick.

The other reason for more air getting into the engine is a bad manifold gasket or loose manifold bolts. This can be checked cheaply by using a spray bottle of water and applying a mist of water on the seams of a running engine. Also mist Vacuum lines and Vacuum solenoids as either may be cracked and allowing air to enter.

The engine RPM will change or stall when the leak pulls the water into the engine. If you do not find anything, the problem may be internal with the manifold runners.

Now Kia may regulate the injectors as two separate Banks, but they would usually have an O2 sensor sending a problem Code for a defective O2 if the fuel ratio never straightened out. So it is only remotely possible that the O2 is not giving an accurate reading. But it is still a possibility that installing a new O2 will fix the problem.

Some manufacturers have specifications that will permit a Technician to determine by Electrical performance, if the O2 sensor is good or not. But for the extra time involved in checking it, it may be cheaper to just replace it.

Finally, if any problem is do to a Federal pollution part they have a Warranty. Also Kia advertises 10 year/100,000 miles on the Powertrain and this may be a covered part.

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Posted on Jan 23, 2013

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What hoses ??
Code 174 is the computer saying the fuel system is too lean on bank two. Bank two is the side of the engine with cylinder two.
The problem could be one of the O2 sensors or a fuel problem.

Posted on Jan 23, 2013


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