2019 Ford P0172: What It Means & Is It Safe to Drive?
P0172 on the 2019 Ford: System Too Rich (Bank 1). Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
PowertrainMedium urgency
What this code means
Too much fuel relative to air. O2 sensor detects low oxygen in exhaust; PCM is reducing fuel trim.
Common causes on the 2019 Ford
- Faulty MAF or O2 sensor
- Leaking fuel injector(s)
- High fuel pressure
- Faulty purge valve stuck open
Symptoms
- Check Engine Light
- Rich smell, black smoke
- Poor fuel economy
- Rough idle possible
Typical fixes
- Replace MAF or O2 sensor
- Test fuel pressure and injectors
- Replace purge valve if stuck open
Repair cost range
For a 2019 Ford, repairs for P0172 typically fall between $100 and $600, depending on the root cause and labor rates in your area.
Known issues on Ford
Ford P0172 on the 4.6L and 5.4L V8 is often caused by a faulty O2 sensor skewed rich or a leaking fuel injector. On the 5.0L Coyote, check for a stuck EVAP purge valve causing excessive fuel vapor.
Most commonly affected models
F-150 2004–2014Explorer 2002–2010Focus 2005–2011