The OBD code P0171 for Ford indicates a system too lean condition in bank 1. This affects the fuel system.
Symptoms include the Check Engine Light on, increased fuel consumption.
Causes may include intake air leaks, faulty oxygen sensor, ignition misfiring, or faulty fuel injectors.
It’s a moderate issue that can affect engine performance.
A possible fix is to inspect and repair any intake air leaks, check the oxygen sensor, and ensure proper fuel system operation.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
I know how frustrating it is to see that warning light pop up again and again. You don’t need to spend money at the mechanic just to clear it. With this pocket-friendly automatic car scanner, you can do it yourself in seconds and and avoid the time and inconvenience of driving to a mechanic. Just plug it in, connect to your Android or iOS phone, and instantly see live data. Understand the fault code, clear it right away, and decide if it’s something urgent or if you’re good to drive. It even monitors your car and sends notifications to your phone, so you’re always in control. Simple, fast, and stress-free—today’s offer price!
Symptoms of the Ford p0171 OBD Code
The vehicle may experience a lean condition due to a Ford P0171 fault code.
- With Ford OBD code P0171, you may notice the Engine Light ON.
- Excessive Fuel Consumption.
Causes of the Ford p0171 OBD Code
Do you know you can clear most fault codes—but some could mean serious danger? Don’t take chances with your safety or your family’s safety. This budget-friendly car scanner makes it easy to clear fault codes in seconds while showing you exactly what’s wrong. Plug it in, connect to your Android or iOS phone, and instantly check live data. You’ll know if it’s a minor issue you can clear or something serious that needs attention—so you can drive safely and stress-free. (Today’s Deal)
Possible reasons for Ford P0171 include vacuum leaks, faulty MAF sensor, or fuel delivery issues.
- P0171 can be caused by intake air leaks.
- Faulty front heated oxygen sensor.
- Ignition misfiring.
- Faulty fuel injectors.
- Exhaust gas leaks.
- Incorrect fuel pressure.
- Lack of fuel.
- Faulty Positive Crankcase Ventilation (PCV).
- Faulty Mass Air Flow (MAF) sensor.
- Incorrect PCV hose connection.
Fixing Ford Error Code p0171 Step By Step
Addressing a lean condition on bank 1 due to a vacuum leak or faulty MAF sensor.
- To fix Ford OBDII code P0171, start by reviewing the possible causes mentioned above.
- Visually examine the corresponding wiring harness and connectors for any damage.
- Check the connector pins for signs of being broken, bent, pushed out, or corroded.
- Inspect the intake system for vacuum leaks, such as cracked hoses or loose clamps.
- Clean or replace the Mass Air Flow (MAF) sensor if contaminated.
- Check for a clogged fuel filter or weak fuel pump.
- Ensure the PCV system is functioning correctly.
- Finally, consider performing a fuel system cleaning or injector service if needed.
Cost Of Fixing Ford p0171 Fault Code
The repair for Ford P0171 may involve replacing a faulty oxygen sensor or repairing a vacuum leak.
The cost to diagnose and fix the Ford OBD code P0171 typically ranges from $75 to $150 per hour for labor rates.
With an estimated repair time of 1. 0 hour, the total cost can be around $75 to $150, depending on shop rates and the complexity of the issue.
Details of the Ford p0171 OBD Code
Ford code P0171 indicates a lean condition in bank 1 of the engine.
OBD code P0171 for Ford vehicles indicates a system too lean condition in bank 1. This means that the engine control module (ECM) has detected that the airfuel mixture is too lean or there is too much air and not enough fuel being delivered to the engine cylinders on the bank 1 side of the engine.
This can be triggered by a variety of issues such as a vacuum leak, faulty oxygen sensor, fuel delivery problems, or a dirty mass airflow sensor.
The ECM monitors the oxygen sensor signals to determine the airfuel ratio and triggers this code when it detects a lean condition beyond the specified threshold.
Mechanic’s Tech Notes
Detailed information on Ford P0171 code, including possible causes, symptoms, and diagnostic steps for lean fuel condition.
To diagnose and fix OBDII code P0171 on a Ford, start by checking for vacuum leaks using a smoke machine or propane torch.
Inspect the PCV system for leaks or blockages.
Test the Mass Air Flow (MAF) sensor with a multimeter for proper voltage output.
Verify fuel pressure with a gauge to ensure it meets specifications.
Clean or replace the oxygen sensor if necessary.
Reset the code and monitor fuel trims to confirm the issue is resolved.
If the problem persists, consider checking the intake manifold gaskets for leaks.
FAQ
Common causes of OBD code P0171 in a Ford vehicle include intake air leaks, faulty front heated oxygen sensor, ignition misfiring, faulty fuel injectors, and incorrect fuel pressure.
Diagnose P0171 in Ford: Check for intake leaks, faulty oxygen sensor, misfires, fuel issues. Inspect wiring, connectors for damage, corrosion. Fix as needed.
Yes, it is safe to drive with OBD code P0171 in a Ford vehicle, but address it promptly to prevent potential engine damage from running lean.
Wrap Up
If your Ford is displaying OBD code P0171 and experiencing rough idle, lack of power, or poor fuel economy, it may be caused by a vacuum leak, faulty oxygen sensor, dirty or clogged fuel injectors, or a malfunctioning mass airflow sensor.
To address Ford OBD code P0171, check for vacuum leaks in the intake system, inspect the oxygen sensor for proper operation, clean or replace clogged fuel injectors, and test the mass airflow sensor for accurate readings.
Additionally, ensure the air filter is clean and the intake system is free from obstructions.
