how to fix P0171 code in Ford F-150 13th Generation (2015-2020)

• •Check engine light illuminated
• •Rough idle or stalling
• •Loss of power during acceleration
• •Poor fuel economy
• •Unusual engine noises
• •Increased emissions

1. 1Scan the vehicle’s onboard computer using an OBD-II scanner to confirm the P0171 code and check for any additional codes.
2. 2Inspect the air intake system for any leaks, cracks, or loose connections.
3. 3Check the fuel pressure using a fuel pressure gauge to ensure it meets manufacturer specifications.
4. 4Examine the Mass Air Flow (MAF) sensor for dirt or damage, and clean or replace as necessary.
5. 5Inspect the vacuum lines for any cracks or disconnections that may cause a lean condition.
6. 6Verify the condition of the fuel injectors for proper operation and cleanliness.

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
• •Fuel pressure gauge
• •Multimeter
• •Socket set
• •Torque wrench
• •Cleaning spray (MAF cleaner)
• •Vacuum pump

• •Air filter (if replacement is needed)
• •MAF sensor (if cleaning does not resolve the issue)
• •Fuel filter (if clogged)
• •Vacuum lines (if damaged)
• •Fuel injectors (if defective)