how to fix P0171 code in Tesla Outback 5th Generation (2015-2019)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to prevent any electrical issues.
• Ensure the engine is cool to avoid burns.

2. Inspect and Repair Air Intake System

• Tools Required: Vacuum gauge, screwdriver set, hose clamps.
• Inspect all vacuum hoses for cracks or disconnections. Replace any damaged hoses.
• Check the intake manifold for leaks using a vacuum gauge. If leaks are found, use a suitable sealant or replace the gasket.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, soft brush.
• Remove the MAF sensor from the air intake tube.
• Clean the sensor using MAF cleaner and a soft brush, being careful not to damage the sensor elements.
• Reinstall the MAF sensor and ensure all connections are secure.

4. Inspect and Test Fuel System

• Tools Required: Fuel pressure gauge, socket set.
• Connect the fuel pressure gauge to the fuel rail and turn the ignition key to the ON position without starting the engine. Check if the fuel pressure is within specified range (usually 30-50 psi for most vehicles).
• If pressure is low, inspect the fuel pump and filter for issues.
• If the fuel injectors are suspect, remove and clean or replace them as necessary.

5. Clear Codes and Test Drive

• Reconnect the battery.
• Use the OBD-II scanner to clear the P0171 code.
• Take the vehicle for a test drive to ensure the issue is resolved and monitor for any reoccurrence of the check engine light.