how to fix P0174 code in Toyota Camry XV70 (2018-2024)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to avoid electrical shorts.
• Allow the engine to cool if it has been running.

2. Inspect and Repair Intake System

• Sub-step 1: Visually inspect all intake hoses and clamps for cracks or disconnections.
• Sub-step 2: Replace any damaged hoses or clamps.
• Sub-step 3: Use a smoke machine or soapy water to detect leaks around the intake manifold.
• Sub-step 4: If leaks are found, replace the intake manifold gasket.

3. Clean or Replace MAF Sensor

• Sub-step 1: Locate the MAF sensor in the air intake duct.
• Sub-step 2: Disconnect the electrical connector and remove the MAF sensor from the housing.
• Sub-step 3: Clean the MAF sensor using MAF cleaner spray (do not touch the sensor with hands).
• Sub-step 4: Reinstall the MAF sensor and reconnect the electrical connector.

4. Check Fuel System

• Sub-step 1: Connect the fuel pressure gauge to the fuel rail.
• Sub-step 2: Start the engine and check if the fuel pressure is within the manufacturer’s specifications.
• Sub-step 3: If pressure is low, inspect the fuel filter and fuel pump for issues. Replace as necessary.

5. Inspect Fuel Injectors

• Sub-step 1: Check the fuel injectors for proper operation using a noid light or multimeter.
• Sub-step 2: If an injector is faulty or leaking, replace it with a new one.
• Sub-step 3: Reconnect all components properly after inspection.