P0172 Chevrolet -

Question

How is this repaired....can it be done by a mechanic?

Answer 1

P0172 Fuel trim rich Bank 1

First step is do an inspection , when you have a rich fuel trim what happens is the air to fuel ratio is out of balance, where there is more fuel than required. The firs is to inspect the air filter,  There are cases where a rich fuel trim will need more inspection from a automotive repair place

 A airfilter that is plugged will limit the amount of air into the engine

A clean airfilter allows the engine to breather more