Question

I have a 2002 Volvo V40 with engine code P0171, what is the meaning?

Answer 1

P0171 Fuel trim lean bank 1 Causes false air leak, Whenever I see this code I look for vacuum leaks,especially at bank 1 area (bank 1 thats where the number 1 cylinder is at) another popular cause is sparkplug condition if they are worn the spark gap widen this in return causes lean condition,so look for vacuum leaks especially at the intake gasket,,vacuum hoses,and sprkplug condition

Answer 2

P0171 VOLVO - System Too Lean Bank 1

Read more: https://www.autocodes.com/p0171_volvo.html