how to address P0171 code on Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

Tools Required:

• OBD-II scanner
• Fuel pressure gauge
• Multimeter
• Socket set
• Torque wrench
• Smoke machine (optional)

2. Inspect and Repair Air Intake System

• Sub-step 1: Visually inspect all air intake hoses and connections for cracks or leaks.
• Sub-step 2: If any issues are found, replace the damaged hoses or connections.
• Sub-step 3: If no issues are found, perform a smoke test to identify hidden leaks.

3. Check and Clean MAF Sensor

• Sub-step 1: Locate the MAF sensor, typically found in the air intake duct.
• Sub-step 2: Disconnect the electrical connector and remove the sensor.
• Sub-step 3: Clean the MAF sensor using MAF cleaner and a soft brush; allow it to dry completely before reinstalling.
• Sub-step 4: Reinstall the MAF sensor and reconnect the electrical connector.

4. Test Fuel Pressure

• Sub-step 1: Connect the fuel pressure gauge to the fuel rail according to the manufacturer's specifications.
• Sub-step 2: Turn the ignition key to the "on" position (without starting) to check the pressure.
• Sub-step 3: Compare the reading with the manufacturer's specified range; if low, check the fuel pump and filter.

5. Inspect Oxygen Sensors

• Sub-step 1: Using a multimeter, test the O2 sensors for proper voltage and response time.
• Sub-step 2: If a sensor is not functioning correctly, replace it with a new sensor.

6. Reconnect Battery and Clear Codes

• Sub-step 1: Reconnect the negative battery terminal.
• Sub-step 2: Use the OBD-II scanner to clear the P0171 code from the ECM.