how do I fix a P0171 code on my Tesla Model S Original (2012-2020)

• •Check engine light illuminated
• •Poor engine performance or rough idle
• •Decreased fuel efficiency
• •Engine stalling during acceleration
• •Increased emissions
• •Unusual engine noise

1. 1Scan the vehicle's OBD-II system using a compatible scanner to confirm the P0171 code and check for any additional codes.
2. 2Inspect the air intake system for any vacuum leaks, including hoses, gaskets, and the intake manifold.
3. 3Check the fuel pressure using a fuel pressure gauge to ensure it meets manufacturer specifications.
4. 4Inspect the mass air flow (MAF) sensor for dirt or damage and consider cleaning or replacing it as necessary.
5. 5Examine the fuel injectors for clogs or malfunctions using a noid light or by performing a fuel injector balance test.
6. 6Review the engine's fuel trim values using an OBD-II scanner to assess the degree of the lean condition.

After completing the repair, verify that the issue has been resolved:

• ✓Test the affected component to ensure it functions correctly
• ✓Check for any error codes or warning lights
• ✓Monitor the vehicle for a few days to ensure the issue does not recur

To prevent this issue from occurring again:

• •Follow the manufacturer's recommended maintenance schedule
• •Address warning signs early before they develop into major issues
• •Use quality parts and fluids recommended for your vehicle
• •Keep detailed records of all repairs and maintenance

• •OBD-II scanner
• •Fuel pressure gauge
• •Smoke machine (for leak detection)
• •MAF sensor cleaner
• •Basic hand tools (screwdrivers, wrenches, etc.)

• •Vacuum hoses (if damaged)
• •Fuel pressure regulator (if faulty)
• •MAF sensor (if necessary)
• •Fuel injectors (if needed)