my Ford F-150 is showing a P0171 code what does it mean

• •Check engine light illuminated
• •Rough idle when the engine is running
• •Decreased engine performance or power
• •Poor acceleration response
• •Poor fuel economy
• •Engine stalling during low RPMs

1. 1Scan for error codes using an OBD-II scanner to confirm the P0171 code and check for any additional codes.
2. 2Inspect the air intake system for leaks, including hoses and clamps, to ensure a tight seal.
3. 3Check the mass airflow (MAF) sensor for dirt or malfunction; clean or replace if necessary.
4. 4Measure fuel pressure with a fuel pressure gauge to ensure it meets manufacturer specifications.
5. 5Inspect the fuel injectors for clogs or leaks; perform a balance test if necessary.
6. 6Examine the vacuum lines for leaks or cracks that could cause excess air to enter the system.

After completing the repair, verify that the issue has been resolved:

• ✓Test the affected component to ensure it functions correctly
• ✓Check for any error codes or warning lights
• ✓Monitor the vehicle for a few days to ensure the issue does not recur

To prevent this issue from occurring again:

• •Follow the manufacturer's recommended maintenance schedule
• •Address warning signs early before they develop into major issues
• •Use quality parts and fluids recommended for your vehicle
• •Keep detailed records of all repairs and maintenance

• •OBD-II scanner
• •Multimeter
• •Torx screwdriver set
• •Fuel pressure gauge
• •Vacuum gauge (optional)
• •Fuel line disconnect tool

• •MAF sensor cleaner
• •Fuel filter (if replacement is necessary)
• •Fuel injectors (if replacement is necessary)