How do you fix bank 1 running lean?

What repairs can fix the P0171 code?

1. Replacing the fuel pump.
2. Replacing the fuel filter.
3. Replacing the fuel pressure regulator.
4. Replacing the powertrain control module.
5. Replacing one or more injectors.
6. Replacing one or more oxygen sensors.
7. Replacing the mass air flow sensor.
8. Repairing a vacuum leak.

How much does it cost to fix P0171 code?

What is the cost to resolve a P0171 code? This code will require a diagnostic check, which will run about $100 depending on the time it takes to find the issue. As there is a laundry list of reasons why the engine runs lean, the average price per repair will vary greatly.

What is the code for a vacuum leak?

Trouble code P0171 is indicative of a vacuum leak. We suspect somewhere around the engine there is a vacuum hose that is disconnected, broken or brittle. The break in the vacuum line(s) is allowing unmetered air to enter the intake manifold.

Should I drive with code P0171?

It is okay to drive a vehicle with P0171 for a short period of time, but driving with this code for an extended period of time can overheat the engine and cause internal engine damage.

Can bad fuel injectors cause P0171 code?

A leak that causes diagnostic trouble code P0171 could be anywhere around the engine intake, including the PCV hoses, vacuum hoses, and the intake manifold gasket. A weak or failing fuel pump won’t push enough gasoline to the engine. Clogged fuel injectors or a dirty fuel filter will cause a similar backup.

Is a vacuum leak expensive to fix?

Depending on where the leak is in your vacuum system the repair cost can range from as low as about $150 to as much as $1,000. As you know, your engine requires not just fuel but oxygen to maintain a combustion reaction.

Can bad spark plugs cause a lean code?

No. Lean condition is more air than fuel. Usually a vacuum leak somewhere. Bad spark plugs usually results in a rich condition since the fuel is not being burned fully.