my Tesla Outback 5th Generation (2015-2019) has a P0171 code what should I check

Solution

1. Preparation

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

2. Inspect and Repair Vacuum Leaks

• Inspect all vacuum hoses and connections in the air intake system.
• Tighten any loose fittings and replace any damaged hoses.
• Use a smoke test if necessary to identify hidden leaks.

3. Clean or Replace MAF Sensor

• Remove the MAF sensor from the air intake.
• Use MAF cleaner to gently clean the sensor element; do not touch the element with fingers.
• If the sensor is damaged, replace it with a new unit.
• Reinstall the MAF sensor securely.

4. Check and Adjust Fuel Pressure

• Connect a fuel pressure gauge to the fuel rail.
• Compare the reading with the manufacturer's specifications (typically 40-60 psi for most vehicles).
• If pressure is low, inspect the fuel pump and filter; replace if necessary.

5. Inspect Fuel Injectors

• Remove fuel injectors for inspection.
• Clean the injectors using a specialized cleaning kit or replace them if clogged.
• Reinstall injectors, ensuring they are seated correctly.