What Does P0172 Mean on Your 2024 Ford Maverick?
If your 2024 Ford Maverick is showing a P0172 code, the powertrain control module has detected that Bank 1 is running richer than the target air-fuel ratio. The 2024 Maverick continues with the standard 2.5L Atkinson-cycle hybrid powertrain (191 hp combined) and the optional 2.0L EcoBoost turbocharged four-cylinder (250 hp). Both are inline-four engines with a single bank.
A rich condition means more fuel is being burned than the engine needs. This results in poor fuel economy, potential spark plug fouling, and catalytic converter stress. Since the 2024 model is brand new and under full warranty, a dealer visit is often the best first move.
Common Symptoms You May Notice
- Illuminated check engine light
- Worse fuel economy than EPA estimates
- Rough or fluctuating idle speed
- Black smoke from the exhaust
- Fuel smell at the tailpipe
- Reduced power or hesitation
Top Causes of P0172 on the 2024 Maverick
- Dirty MAF sensor - Even on a new vehicle, the mass airflow sensor can become contaminated by road dust or debris, causing underreported airflow and excess fueling.
- Boost leak (EcoBoost model) - The 2.0L EcoBoost has turbo charge piping that can loosen at clamps or develop small leaks, causing air loss after the MAF measurement point.
- Upstream O2 sensor malfunction - A defective oxygen sensor can ship from the factory or degrade quickly, sending incorrect signals to the PCM.
- EVAP purge valve stuck open - A malfunctioning purge valve allows continuous fuel vapor flow into the intake, enriching the mixture.
How to Diagnose the Problem
Scan for codes and review freeze frame data. Check Bank 1 STFT and LTFT values. Negative LTFT beyond -10% confirms the engine is running rich.
Inspect the air filter, which should still be clean on a 2024 model but worth checking. Clean the MAF sensor with dedicated MAF cleaner spray as a first step.
On the 2.0L EcoBoost, inspect all boost hoses and intercooler connections for tightness. A smoke test can reveal small leaks. On the hybrid model, focus on the MAF, O2 sensor, and EVAP system.
Monitor the upstream O2 sensor with a scan tool. It should switch between 0.1V and 0.9V. If the reading stays high, the rich condition is confirmed.
Repair Options and Cost Estimates
- MAF sensor cleaning or replacement: Cleaning is under $10. Replacement is $50-$160 plus $45-$100 labor.
- Boost leak repair: Parts cost $20-$75. Labor runs $65-$165.
- O2 sensor replacement: Parts are $50-$150. Labor is $65-$135.
- EVAP purge valve replacement: Parts cost $25-$60. Labor is $50-$105.
Can You Fix This Yourself?
MAF cleaning is the easiest DIY repair on the Maverick. Boost hose checks require no special tools. O2 sensor replacement is moderate difficulty. Since the 2024 model is under warranty, consider having the dealer handle it to protect your coverage.
Prevention Tips
- Keep up with air filter replacements per the maintenance schedule
- Use quality fuel from reputable stations
- Inspect the turbo charge pipes at oil change intervals on the EcoBoost
- Address check engine lights promptly to maintain warranty coverage