What P0174 Means on Your 2022 Dodge Hornet
A P0174 code on your 2022 Dodge Hornet indicates the ECM has detected a lean air-fuel condition on Bank 2. The Hornet launched in 2023 model year (some sold as 2023), with the base model using a 2.0L turbocharged four-cylinder engine producing 268 horsepower, and the R/T featuring a 1.3L turbo-four plug-in hybrid. As inline-four engines with one bank, P0174 means the lean correction has exceeded its limits.
The Hornet is based on the Alfa Romeo Tonale platform and shares much of its powertrain. Lean conditions need prompt attention on turbocharged engines.
Symptoms
- Check engine light on
- Rough or unstable idle
- Reduced power and boost
- Poor fuel economy
- Hesitation on acceleration
- Possible surging at cruise speed
Common Causes
- Boost Leak (35% likelihood) – The 2.0T has charge piping, intercooler connections, and turbo outlet hoses that can develop leaks.
- MAF Sensor Issue (25% likelihood) – Contamination or failure of the mass airflow sensor.
- Fuel System Problem (20% likelihood) – Faulty fuel injector or fuel pressure issue in the direct injection system.
- Software Calibration (20% likelihood) – As a new platform, Stellantis may have released calibration updates.
Diagnosis
- Dealer visit – The Hornet is likely under warranty.
- Check TSBs – New platform models often have software updates available.
- Boost leak test – Find turbo system leaks.
- Component testing – MAF, injectors, fuel pressure.
Repair Costs
- Boost leak – $80–$400.
- MAF sensor – $100–$280.
- Fuel system – $250–$650.
- Software update – Free under warranty.
Under Stellantis's 3-year/36,000-mile basic warranty and 5-year/60,000-mile powertrain warranty, these repairs should be covered.
Dealer Is Recommended
The Hornet's Alfa Romeo-derived powertrain requires specific diagnostic tools. The dealer is the best choice for proper diagnosis, especially while under warranty. They can also apply software updates and check for TSBs specific to the Hornet platform.
Prevention
- Follow the maintenance schedule
- Use quality fuel
- Keep OEM air filtration
- Report drivability changes to the dealer
- Stay current on software updates