how to fix P0171 code in Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shocks.

2. Inspect and Repair Air Intake System

• Tools Needed: Socket set, screwdrivers, flashlight.
• Inspect the air intake hose for cracks or leaks.
• Tighten any loose clamps or replace damaged hoses.
• If leaks are found, replace the affected components.

3. Clean or Replace MAF Sensor

• Tools Needed: MAF cleaner, screwdriver.
• Remove the MAF sensor from the air intake duct.
• Spray MAF cleaner on the sensor elements, ensuring no residue remains.
• Reinstall the MAF sensor securely.

4. Test Fuel Pressure

• Tools Needed: Fuel pressure gauge.
• Connect the fuel pressure gauge to the fuel rail test port.
• Turn the ignition to the "On" position (do not start the engine) and observe the pressure reading.
• If the pressure is below specifications (consult the Tesla service manual), replace the fuel pump.

5. Inspect Fuel Injectors

• Tools Needed: Injector cleaning kit (optional), multimeter.
• Use a multimeter to check the resistance of each injector; compare with specifications.
• If injectors are faulty, remove and replace them with new units.
• Optionally, clean the injectors using an injector cleaning kit.