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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.
• Allow the vehicle to cool down before starting repairs.

2. Inspect and Repair Air Intake System

• Check all vacuum hoses for cracks or disconnections.
• Replace any damaged hoses.
• Ensure the air filter is clean; replace if necessary.

3. Check and Clean MAF Sensor

• Locate the MAF sensor, typically found in the intake air duct.
• Remove the MAF sensor carefully using a socket set.
• Clean the MAF sensor using a dedicated MAF cleaner.
• Reinstall the sensor and ensure it is properly secured.

4. Test and Repair Fuel Delivery System

• Connect a fuel pressure gauge to the fuel rail.
• Start the engine and check the fuel pressure reading; it should meet manufacturer specifications (typically around 50-60 psi).
• If pressure is low, inspect the fuel pump and replace it if necessary.
• Check the fuel injectors for clogs; clean or replace them if needed.

5. Clear Error Codes

• Reconnect the battery.
• Use an OBD-II scanner to clear the P0171 code from the ECM.
• Monitor for any reoccurrence of the code after repairs.