2023 Ram P0172: What It Means & Is It Safe to Drive?
P0172 on the 2023 Ram: 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 2023 Ram
- 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 2023 Ram, repairs for P0172 typically fall between $100 and $600, depending on the root cause and labor rates in your area.
Known issues on Ram
Ram HEMI P0172 rich condition on Bank 1 typically comes from a leaking fuel injector or a stuck-open EVAP purge valve. On the 3.6L Pentastar, a rich condition alongside a rough idle usually points to a purge valve stuck open—inspect the purge solenoid first.
Most commonly affected models
Ram 1500 5.7L HEMI 2009–2018Ram 1500 3.6L Pentastar 2012–2018