What Does P0172 Mean on Your 2022 Ford Maverick?
A P0172 code on your 2022 Ford Maverick indicates that Bank 1 is running too rich, meaning there is too much fuel relative to the air entering the engine. The 2022 Maverick comes with two powertrain options: the standard 2.5L Atkinson-cycle four-cylinder paired with a hybrid system (191 hp combined), and the optional 2.0L EcoBoost turbocharged four-cylinder making 250 horsepower. Both are inline-four engines with only one bank.
P0172 is more commonly seen on the 2.0L EcoBoost version due to its turbocharging system, but the 2.5L hybrid engine can also set this code. A rich condition wastes fuel, fouls spark plugs, and can damage the catalytic converter if not addressed.
Common Symptoms You May Notice
- Check engine light on
- Reduced fuel economy
- Rough or unstable idle
- Black smoke from the exhaust
- Fuel smell at the tailpipe
- Hesitation or stumble under acceleration
Top Causes of P0172 on the 2022 Maverick
- Dirty MAF sensor - The mass airflow sensor accumulates contamination over time, causing it to underread airflow. This is the most common cause on both the 2.0L EcoBoost and 2.5L hybrid engines.
- Boost leak (2.0L EcoBoost only) - The turbocharged engine has charge piping that can develop leaks, causing unmetered air loss and over-fueling.
- Faulty upstream O2 sensor - A degraded oxygen sensor provides incorrect readings, causing the PCM to enrich the fuel mixture.
- Stuck-open EVAP purge valve - A purge valve that stays open sends excess fuel vapor into the intake manifold, pushing the mixture rich.
How to Diagnose the Problem
Start with an OBD-II scan and check freeze frame data. Review Bank 1 short-term and long-term fuel trims. LTFT more negative than -10% confirms the rich condition.
Check and replace the air filter if needed. Clean the MAF sensor with proper MAF cleaner. On the Maverick, the MAF is located in the air intake tube between the filter and the throttle body (or turbo inlet on the EcoBoost).
For the 2.0L EcoBoost, inspect all charge pipes and intercooler hoses for leaks. Use a smoke test if available. For the 2.5L hybrid, focus on the MAF, O2 sensor, and EVAP system.
Monitor the upstream O2 sensor with live data. It should oscillate between 0.1V and 0.9V. Test the EVAP purge valve by checking for unexpected vacuum when the valve should be closed.
Repair Options and Cost Estimates
- MAF sensor cleaning or replacement: Cleaning is under $10. Replacement costs $50-$155 plus $45-$95 labor.
- Boost leak repair (EcoBoost): Hoses and clamps run $20-$70. Labor is $65-$160.
- O2 sensor replacement: Parts cost $50-$145. Labor is $65-$130.
- EVAP purge valve replacement: Parts are $25-$55. Labor runs $50-$100.
Can You Fix This Yourself?
The Maverick is one of the most DIY-friendly trucks on the market. MAF sensor cleaning takes 15 minutes. Boost hose inspection is simple. O2 sensor replacement is moderate. EVAP purge valve replacement is usually straightforward.
Prevention Tips
- Replace the air filter every 15,000-20,000 miles
- Use quality fuel from reputable stations
- Check boost hose connections periodically on the EcoBoost model
- Run a fuel system cleaner every 5,000 miles