A Ford P0171 is a LEAN code for cylinder bank 1, and P0174 is a LEAN code for cylinder bank 2. These codes commonly occur on many Ford vehicles, and are set when the powertrain control module (PCM) sees the air/fuel mixture is running too lean (too much air, not enough fuel).
How do I fix the code P0171 on my Ford?
Zitat von Youtube: Below. So it could be because of a bad upstream oxygen sensor what about number two guys. Most common reason vacuum leak what is known as a vacuum leak vacuum leak guys.
How do I fix code P0171?
Zitat von Youtube: You can spray the maf sensor cleaner onto the wire perpendicularly to the ground so that it won't damage the maf sensor reinstall the maf sensor back in the car after it gets dry.
Can I drive my car with code P0171?
Any time your check engine light is on, you should take the reading seriously. A P0171 code is no exception to this rule. When the engine stores this code, you should not drive your vehicle far, if at all. When your engine runs lean, there is not enough gasoline for it to run efficiently.
What could cause a P0171 code?
The most common causes of the P0171 code are vacuum or intake leaks, low fuel pressure, faulty PCV valve, or a faulty MAF sensor.
How much does it cost to fix P0171 code?
You may get lucky with one of the simple repairs mentioned above. A broken vacuum hose sucking in air can be around $50, or a clogged fuel filter for $100. On the other hand, an oxygen sensor or mass air flow sensor can bring a bill of $400 to $500 dollars.
Is P0171 serious?
Issue Severity: MODERATE– Extended driving with this code can cause internal engine damage. Repair Urgency: Get this code fixed as soon as possible to avoid damage to spark plugs, pistons, and catalytic converters. Diagnosis: It is important to complete the entire diagnostic process when diagnosing P0171.
Can a dirty air filter cause a P0171 code?
If the filter is clogged or excessively dirty, this is enough to impede or restrict the air flow, hence resulting in a lean running condition. Besides a dirty air filter, the P0171 code can also be blamed on a dirty or faulty MAF sensor and a clogged fuel filter.
Can a loose gas cap cause P0171 code?
It doesn’t set a code that is false. A lean code from a vacuum leak, mass air flow failure, pcv valve bad or low fuel pressure is 171.
Can a clogged fuel filter cause a lean condition?
A clogged fuel filter causes low fuel pressure that results in a lean fuel condition and engine misfire. This can result in poor fuel mileage, rough idling and possibly cause the check engine light to come on.