your bank1 sensor1 detects more o2 then usual. The system thought it's lean and gave you p0171 code. Check leakage first and fix it. if still get same code then clean air flow sensor again.
your bank1 sensor1 detects more o2 then usual. The system thought it's lean and gave you p0171 code. Check leakage first and fix it. if still get same code then clean air flow sensor again.