Question about 2000 Hyundai Sonata
The computer shows code: PO171. What usually causes this problem?My mechanic says that it could be 3 things. Which of those three are most common, because I would not like to spend my money on something that is not necessary. Thank you.
Had this problem, it was the oxygen sensor, actually there are 2 of them. Had one replaced and 6 months later the light was back on, they recplaced second, no problems since.
Posted on Aug 11, 2008
P0171 system too lean , bank 1
the most causes is :-
1- intake or exhaust leak . test the air filter in intake hose or
blocked exhaust pipe
2-MAF sensor (Manifold Air Flow sensor) locate in intake hose
3-fuel pressure or pump may be the filter blocked or need change
4- injectors may be need cleaning by use a cleaner with fuel
5-HO2S (Heated Oxygen Sensor ) locate in exhaust pipe bank 1 near the engine
check this causes , and ask for more information
WITH MY BEST WISHES
Posted on Jul 10, 2008
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Posted on Jan 02, 2017
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