P0175 on the 2023 Ford Bronco Sport
A P0175 code on your 2023 Ford Bronco Sport means the engine is running too rich. The 2023 Bronco Sport carries over the same engine options: the 1.5L EcoBoost three-cylinder (181 hp) for most trims and the 2.0L EcoBoost four-cylinder (250 hp) for the Badlands trim. Both are turbocharged direct-injection engines that require precise fuel metering for optimal operation. A rich condition on either engine points to sensor, injector, or turbo system issues.
2023 Updates and Relevance to P0175
The 2023 Bronco Sport received minor updates but the powertrain is essentially unchanged. Ford may have updated PCM calibrations to refine fuel trim behavior, but the core components and potential failure points remain the same as the 2021-2022 models. Any lessons learned from earlier model years should be reflected in improved component quality.
Symptoms
- Check engine light active on the dashboard
- Fuel economy below rated specifications
- Dark or sooty exhaust output
- Rough or vibrating idle, particularly on the three-cylinder
- Turbo response feels sluggish or inconsistent
- Gasoline odor from exhaust area
Primary Causes
1. MAF Sensor Contamination
The MAF sensor on the Bronco Sport's intake is exposed to environmental contaminants, especially on vehicles used for outdoor recreation. Even suburban driving introduces dust and PCV vapors to the sensor. At 15,000-30,000 miles on a 2023 model, enough contamination can accumulate to affect fuel trims. Cleaning takes minutes and costs under $15.
2. O2 Sensor Premature Failure
On a relatively new 2023 model, an O2 sensor failure is likely a manufacturing defect. The turbo exhaust environment is harsh on sensors, and occasional units fail earlier than expected. The sensor should be covered under warranty. Symptoms include consistently positive long-term fuel trims that do not respond to MAF cleaning.
3. Direct Injector Seal Issue
The high-pressure direct injectors can develop seal issues that allow fuel to leak between injection events. On the 1.5L three-cylinder, one leaking injector is 33% of total delivery, making it immediately noticeable. On the 2.0L, it is 25%. Check for companion cylinder misfire codes.
4. Charge Air System Leak
Turbo boost leaks are common on turbocharged vehicles, especially those that experience off-road vibration. The coupler connections, intercooler end tanks, and charge pipe joints are all potential leak points. A boost pressure test or smoke test identifies these issues.
Diagnosis
- Scan for codes and identify your engine type
- Monitor fuel trims at idle and under boost
- Clean the MAF sensor as a first step
- Drive a complete cycle and recheck trims
- Test the O2 sensor with live data if trims remain off
- Perform boost leak testing
- Check for misfire codes indicating a specific injector
Costs
Under warranty, repairs are free. Otherwise: MAF cleaning under $15, O2 sensor $160-$340, injector $280-$700, boost repair $50-$250. The 2023 model is under full Ford warranty and should be taken to the dealer.
Recommendation
Take the 2023 Bronco Sport to the Ford dealer for P0175 diagnosis. Warranty coverage makes this a no-cost repair. If you want to try a quick fix before the appointment, clean the MAF sensor. Many P0175 codes on the Bronco Sport resolve with this simple step.