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In my 98 Saturn SW2, P0172, system too rich, was caused by a bad engine coolant temp sensor. This is a common failure in these vehicles.It's cheap and easy to replace, and worth trying. When you take it out, if it's the original, it will be cracked. The new ones are metal. It takes a 13mm deep socket.
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My2000 kia rio has code p0172 and p0121?
p0172
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Code P0172 means: System Too Rich
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Trouble code P0172 means:System too rich (Bank 1)
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Trouble code P0172 means:System too rich (Bank 1)
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Trouble code P0172 means: System Too Rich (Bank 1)
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Trouble code P0172 means: System too rich (Bank 1)
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Trouble code P0172 means:System too rich (Bank 1)
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Trouble code P0172 means:System too rich (Bank 1)
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P0172 System too Rich (Bank 1)
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Trouble code P0172 means: System Too Rich (Bank 1)
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Trouble code P0172 means: System Too Rich (Bank 1)
What does code P0172 mean in a 2003 Hyundai accent?
Trouble code P0172 means: System too rich (Bank 1)
