how to fix P0171 code in Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Inspect and Repair Air Intake System

• Step 2.1: Visually inspect all hoses and connections in the air intake system.
• Step 2.2: Tighten or replace any loose or damaged hoses.
• Step 2.3: Use a smoke machine to identify vacuum leaks if necessary.

3. Clean or Replace the MAF Sensor

• Step 3.1: Locate the MAF sensor in the air intake duct.
• Step 3.2: Remove the MAF sensor using a socket set (typically Torx screws).
• Step 3.3: Clean the sensor with MAF cleaner spray and a soft cloth.
• Step 3.4: If damaged, replace the MAF sensor with a new unit.

4. Check and Repair Fuel System

• Step 4.1: Use a fuel pressure gauge to check the fuel pressure at the rail.
• Step 4.2: If the pressure is low, inspect the fuel pump and replace the fuel filter if clogged.
• Step 4.3: Ensure fuel injectors are functioning properly and replace if necessary.

5. Inspect Exhaust System

• Step 5.1: Visually inspect the exhaust system for any blockages or leaks.
• Step 5.2: Repair or replace any damaged exhaust components.

6. Reconnect Battery and Clear Codes

• Step 6.1: Reconnect the negative battery terminal.
• Step 6.2: Use the OBD-II scanner to clear the P0171 code.