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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.
• Ensure the engine is cool before starting work.

2. Inspect and Repair Air Intake System

• Tools Required: Vacuum gauge, hose clamp pliers.
• Inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
• Use a vacuum gauge to test for leaks. If leaks are found, replace the damaged hoses.
• Check the intake manifold gasket for leaks and replace if necessary.

3. Check and Clean the MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver.
• Locate the MAF sensor in the intake duct.
• Disconnect the electrical connector and remove the sensor using a screwdriver.
• Spray MAF sensor cleaner onto the sensor element and allow it to dry completely.
• Reinstall the MAF sensor and reconnect the electrical connector.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Locate the fuel pressure test port on the fuel rail.
• Connect the fuel pressure gauge and turn the ignition to the "ON" position without starting the engine.
• Check the fuel pressure reading against the manufacturer specifications. If pressure is low, inspect the fuel pump and filter.

5. Inspect Fuel Injectors

• Tools Required: Multimeter, injector cleaning kit (if necessary).
• Disconnect the fuel injector electrical connectors.
• Check the resistance of each injector with a multimeter—consult the service manual for expected values.
• If injectors are faulty, replace them. If dirty, use an injector cleaning kit or professional cleaning service.

6. Clear Codes and Test Drive

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0174 code.
• Test drive the vehicle to ensure the issue is resolved and monitor for any reoccurrence of the code.