Question about 2006 Hyundai Sonata
Check engine light is on
Posted by Anonymous on
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Posted on Jan 02, 2017
code system to lean. clean the throttle body especially were the throttle plate sits at idle,use a tooth brush and carb cleaner.dirty throttle bodys cause that code and many others.also cause iratic idle and/or stalling.
Posted on Sep 03, 2010
SOURCE: P0171 and P0174 Left and
P0171 = system too lean bank 1
P0174 = system too lean bank 2
The fuel/air mixture is too lean for the entire engine. The fuel pump pressure could be too low. The fuel pump pressure regulator could be at fault. There could be an air leak downstream of the MAF sensor. MAF sensor (hot wire type) could be dirty. Check for intake manifold vacuum leaks. The engine coolant temp sensor and/or the intake air temp sensor could be faulty (stuck at full hot mode).
Posted on Feb 26, 2011
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