how to fix P0174 code in Toyota Camry Eighth Generation (2018-present)?

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before working on it.

2. Inspect and Repair Intake System

• Sub-steps:
  1. Visually inspect all vacuum hoses attached to the intake manifold for cracks or disconnections.
  2. Use a smoke test to identify any hidden leaks in the intake system.
  3. Replace any damaged hoses or gaskets as needed.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor on the air intake duct.
  2. Disconnect the electrical connector and remove the MAF sensor from its housing.
  3. Clean the sensor using MAF cleaner spray, allowing it to dry completely.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check Fuel Delivery System

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition to the "ON" position without starting the engine and check the fuel pressure reading against manufacturer specifications.
  3. If pressure is low, inspect the fuel pump, fuel filter, and fuel injectors, replacing any faulty components.

5. Inspect Oxygen Sensors

• Sub-steps:
  1. Locate the upstream and downstream oxygen sensors for bank 2.
  2. Use a multimeter to test the sensors’ voltage output; refer to the manufacturer’s specifications.
  3. Replace any oxygen sensors that do not meet specifications.