how to fix P0174 code in Ford F-150 Fourteenth Generation (2021-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery cable to ensure safety.

2. Inspect for Vacuum Leaks

• Use a smoke machine or listen for hissing sounds while the engine is running.
• Replace any damaged vacuum hoses or gaskets found during the inspection.

3. Check and Clean MAF Sensor

• Locate the MAF sensor in the air intake duct.
• Disconnect the electrical connector and remove the sensor.
• Clean the MAF sensor with MAF cleaner spray; do not touch the sensing element.
• Reinstall the MAF sensor and reconnect the electrical connector.

4. Fuel System Inspection

• Use a fuel pressure gauge to measure the fuel pressure at the fuel rail.
• Compare the reading to the manufacturer specifications (typically around 55-65 psi).
• If pressure is low, check the fuel pump, fuel filter, and fuel injectors for issues.

5. Replace Air Filter

• Open the air filter housing and remove the old air filter.
• Inspect the housing for debris and clean if necessary.
• Install a new air filter, ensuring it is seated properly.

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery cable.
• Use the OBD-II scanner to clear the P0174 code and any related codes.