2008 Chrysler P0172: What It Means & Is It Safe to Drive?
P0172 on the 2008 Chrysler: 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 2008 Chrysler
- 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 2008 Chrysler, repairs for P0172 typically fall between $100 and $600, depending on the root cause and labor rates in your area.
Known issues on Chrysler
Chrysler 3.6L Pentastar P0172 bank 1 rich condition is typically a leaking fuel injector or a stuck-open EVAP purge solenoid. On 300 and Pacifica, compare fuel trims at idle vs. cruise to help distinguish an injector leak from a purge valve fault.
Most commonly affected models
300 3.6L 2011–2018Pacifica 3.6L 2017–2023200 3.6L 2015–2017