What Does P0172 Mean on Your 2024 Lincoln Aviator?
A P0172 code on your 2024 Lincoln Aviator indicates the PCM has found that Bank 1 is running too rich. The 2024 Aviator features a 3.0-liter twin-turbocharged V6 producing 400 hp (494 hp in the Grand Touring PHEV), with a 10-speed automatic. Bank 1 is the cylinder bank containing cylinder number 1.
Rich running means excess fuel relative to the air in the combustion mixture. The PCM monitors this through oxygen sensors and sets P0172 when corrections exceed normal operating limits.
Symptoms You May Notice
- Check engine light on
- Reduced fuel economy
- Rough idle
- Black exhaust smoke
- Fuel odor from exhaust
- Reduced turbo response
- Bank 1 misfires
Common Causes of P0172 on the 2024 Lincoln Aviator
- Contaminated MAF Sensor - Oil vapor from the twin-turbo intake coats the MAF element, causing underreporting of airflow.
- Boost System Leak - Multiple charge pipe connections in the twin-turbo system can develop leaks over time.
- Leaking Direct Fuel Injector - High-pressure injectors on Bank 1 can develop seal failures.
- Degraded Bank 1 O2 Sensor - A slow-responding oxygen sensor sends incorrect data to the PCM.
How to Diagnose P0172
- Scan all codes - Check for companion codes.
- Review fuel trims - Negative Bank 1 LTFT confirms the issue.
- Clean the MAF - Best first step.
- Boost leak test - Check all connections.
- Monitor O2 sensors - Check Bank 1 response.
- Test injectors - Check Bank 1 for leaks.
Repair Options and Cost Breakdown
- MAF Cleaning - $15-$30 DIY.
- MAF Replacement - $210-$450 parts and labor.
- Boost Pipe Repair - $140-$530 depending on component.
- Fuel Injector Replacement - $420-$880 per injector.
- O2 Sensor Replacement - $250-$460 parts and labor.
Most repairs cost $230 to $580. Warranty may apply on the 2024 model.
Can You DIY This Repair?
MAF cleaning is the main DIY task. The Aviator engine bay is tight for a premium SUV, limiting DIY access for deeper repairs. Boost hose inspection is feasible. Injector and turbo work require professional equipment.
Prevention Tips
- Replace the air filter every 15,000-20,000 miles
- Use quality fuel from top-tier stations
- Add fuel system cleaner every 10,000 miles
- Have turbo system inspected during service
- Address check engine lights promptly