2019 Land Rover P0172: What It Means & Is It Safe to Drive?
P0172 on the 2019 Land Rover: 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 Land Rover
- 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 Land Rover, repairs for P0172 typically fall between $100 and $600, depending on the root cause and labor rates in your area.
Known issues on Land Rover
Land Rover P0172 bank 1 rich condition on the 5.0L AJ V8 is often a leaking injector O-ring or a failed fuel pressure regulator. On 2.0T Ingenium, a stuck-open EVAP purge valve or a failed MAP sensor are more common causes of over-fueling.
Most commonly affected models
Range Rover 3.0L V6 2013–2020Range Rover Sport 5.0L V8 2010–2020Discovery Sport 2.0T 2015–2022