What is the solution for the P0171 trouble code?

1 Answers
DiAnna
07/29/25 2:28pm
p0171 trouble code solution is: 1. Replace the oxygen sensor and fuel filter; 2. Clean the throttle body and fuel injectors; 3. Check the air flow meter and intake pipe for leaks. The causes of the P0171 trouble code are: 1. Air leak after the air flow sensor; 2. PCV system leak; 3. Oxygen sensor failure or exhaust leak near the oxygen sensor; 4. EGR leak; 5. Air flow sensor failure; 6. Dirty fuel filter; 7. Insufficient fuel supply from the fuel pump; 8. Fuel pressure regulator failure; 9. Clogged fuel injectors; 10. Engine speed sensor failure; 11. Electronic control module failure.
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