P0171 Cadillac -

Question

I am trying the best approach in fixing this problem. Is my vehicle still under warranty because this can be catalytic converter?

Answer 1

P0101 MAF (mass airflow) circuit malfunction

P0171 Fuel trim lean Bank 1

Vacuum leaks can cause both these code condition. this is not a catalytic code but it is a condition, where the engine is recieving more air to its air to fuel ratio.