Ford code
P0171: on a Ford
How much to fix P0171 on a Ford? Typically $90 to $460 for vacuum leak repair, the most common fix. This is an estimate, not a quote.
Ford sells many engines, so the cause behind a lean code depends on which one you have. A plain 2.5 four-cylinder and a turbocharged EcoBoost fail in very different ways.
General meaning of P0171: The computer keeps adding extra fuel to make up for something, and it has reached its limit on the side with cylinder 1. This is called running lean, and it usually means unmetered air is sneaking in or fuel is not getting through. See the full P0171 page.
Models to know about
| Model | Years | What to know |
|---|---|---|
| F-150 | 2011 to 2020 | The 3.5 EcoBoost and 5.0 engines see this with intake leaks and boost hose issues. |
| Escape | 2008 to 2019 | Both the 2.5 and the 1.6 EcoBoost can set it, for different reasons. |
| Explorer | 2011 to 2019 | The 3.5 V6 is common here. |
| Focus | 2012 to 2018 | The 2.0 direct-injection engine has its own fuel-side causes. |
Common causes on a Ford
- Boost leaks on turbocharged EcoBoost engines. A loose charge-air pipe or cracked intercooler hose lets air in or out and confuses the fuel math.
- Intake manifold or gasket leaks on the 3.5 and 5.0 engines as the plastic and rubber age.
- Airflow sensor contamination on 2.5 and 3.0 engines that have a dirty or oiled air filter.
- Low fuel pressure from a weak pump or a failing high-pressure pump on direct-injection engines.
NHTSA's public complaint file shows how owners describe this kind of trouble: the 2014 Ford Escape has 2,089 complaints on file, and 290 of them use wording like check engine, lean, P0171, hesitat. Complaints are owner reports, not proof of a cause.
Check this first
- On a turbo, check every clamp on the pipes between the turbo and the throttle body.
- Look for oil film inside intake pipes, which can mean a failing PCV or valve cover system.
- Ask for fuel trim data at idle and under load. A lean reading only under load points to fuel delivery or boost.
Wide range: this job varies a lot. Itemize your quote for a better answer.
How this range is built
| Part of the job | Low | High |
|---|---|---|
| Parts | $5 | $60 |
| Labor: 0.8 to 2.5 hours × $110 to $150 an hour | $88 | $375 |
| Fees: shop supplies, disposal, diagnostics | $0 | $25 |
| Total, rounded | $90 | $460 |
The hourly rate is the BLS Occupational Employment and Wage Statistics, May 2025 average pay for this trade in the US, $27.13 an hour, times 4 to 5.5 to cover what a shop bills (overhead, tools, insurance, profit). Parts are a band from budget aftermarket to the manufacturer part. Full method.
Not a repair shop, estimates only. Typical range, estimate. Not a quote. Your car, parts and shop change the number.
Intake pipes and hoses are inexpensive. Fuel pumps and high-pressure direct-injection pumps are the costly parts, so ask for proof before they are replaced.
Other repairs that may be involved
| Repair | Typical range, US |
|---|---|
| Vacuum leak repair | $90 to $460 |
| Turbo boost leak repair | $140 to $660 |
| Fuel pump replacement | $370 to $1,075 |
Questions to ask the shop
- Which engine do I have, and what usually causes this code on it?
- Did you test fuel pressure under load?
- Is there an open recall or extended coverage on the fuel system?
Got a quote already? Check it against the range. Wondering if a recall touches this problem? See Ford recalls by model or check a VIN.
P0171 on a Ford: questions
Does P0171 mean my EcoBoost needs a new turbo?
Almost never. Check the hoses, clamps and intake path first.
Is there a recall behind it?
Not by code. But fuel system recalls exist for some Ford models. Use your VIN on the recall page to see yours.
How much does it cost to fix P0171 on a Ford?
The most common fix, vacuum leak repair, has a typical range of $90 to $460 across the US. That is an estimate built from parts prices and local labor wages, not a quote. Your model, engine and shop move it.
P0171 on other makes
Sources
Written from public NHTSA data, owner-reported patterns and general repair knowledge, in our own words. Model lists are examples, not a full list, and patterns are not a diagnosis. Prices updated October 2026. Not a repair shop, estimates only.