What Does P0174 Mean on Your 2024 Ford Bronco?
If your 2024 Ford Bronco is showing a P0174 code, the engine control module has detected that Bank 2 is running too lean. The 2024 Bronco offers the 2.3L EcoBoost turbocharged 4-cylinder and the 2.7L EcoBoost twin-turbo V6. On the 2.7L V6, Bank 2 is the passenger-side cylinder bank. The lean condition means the engine is receiving more air than fuel in the combustion mixture, and the computer has run out of room to add extra fuel.
Common Symptoms
- Check engine light on
- Uneven or rough idle
- Loss of power during acceleration or climbing
- Reduced fuel economy
- Hesitation or stumble when pressing the throttle
- Possible hissing or whistling noise from under the hood
Top Causes for the 2024 Bronco
- Boost or Intake Leak (35% likelihood) - The turbocharged intake system has multiple connections that can be loose from factory assembly or loosened by off-road vibration. Intercooler pipes and clamp connections are the usual culprits.
- MAF Sensor Issue (25% likelihood) - Even on a brand-new vehicle, manufacturing debris or early aftermarket filter installation can contaminate the MAF sensor.
- Fuel Injector Malfunction (20% likelihood) - A defective direct injection fuel injector can cause reduced fuel delivery to specific cylinders on Bank 2.
- Software Calibration Issue (20% likelihood) - On new model year vehicles, PCM software may need an update to properly calibrate fuel trim adjustments. Ford issues technical service bulletins (TSBs) for such issues.
Diagnosis Process
- Check for TSBs - For a 2024 model, check Ford's technical service bulletin database for any known software updates related to P0174.
- Read all codes - Check for companion codes that help isolate the root cause.
- Boost pressure test - Pressurize the turbo intake system to find leaks.
- Test MAF sensor - Compare live readings to factory specifications.
- Monitor fuel trims - Analyze short-term and long-term fuel trim data to quantify the lean condition.
Repair Cost Estimates
- Boost leak repair - $0 to $350 (warranty covered on a 2024 model).
- MAF sensor replacement - $0 to $330 (warranty covered).
- Fuel injector replacement - $0 to $900 (warranty covered).
- PCM software update - $0 at a Ford dealer under warranty.
Warranty Coverage
Your 2024 Ford Bronco is fully covered under both the 3-year/36,000-mile bumper-to-bumper warranty and the 5-year/60,000-mile powertrain warranty. Any factory defect causing P0174 should be repaired at no charge. Take your Bronco to a Ford dealer as soon as possible.
Prevention Tips
- Check boost pipe connections after off-road excursions
- Use OEM air filters until the warranty period ends
- Follow the recommended maintenance schedule in your owner's manual
- Use Top Tier fuel for optimal engine performance
- Keep up with Ford's recommended software updates and recall campaigns