2002 Volvo V40 2.0L T with engine code P0171

Question

P0171 comes back again & again. I've replaced maf, 2 maps, front O2 sensor, fuel pressure regulator, VVT valve. Spark plugs look good, idle control valve & throttle body cleaned. Idle is fine but power is poor. Car has less than 80,000 miles.

Answer 1

P0171 VOLVO - System Too Lean Bank 1

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