What P0174 Means on Your 2023 Dodge Challenger
A P0174 code on your 2023 Dodge Challenger indicates Bank 2 is running too lean. The 2023 Challenger was the final model year, offering the 3.6L Pentastar V6 (303 hp), 5.7L HEMI V8 (375 hp), 6.4L HEMI V8 (485 hp), and the legendary supercharged 6.2L (up to 807 hp in the Demon 170). Bank 2 is the passenger side on all V-configured engines.
As the last of the HEMI Challengers, these cars are already becoming collectible. Keeping the engine in perfect condition is crucial for both performance and long-term value.
Symptoms
- Check engine light on
- Rough idle
- Reduced power output
- Poor fuel economy
- Hesitation during acceleration
- Possible engine knock under hard throttle
Common Causes
- Vacuum Leak (30% likelihood) – Intake manifold gaskets and vacuum hoses on the HEMI or Pentastar.
- Exhaust Manifold Leak (25% likelihood) – The well-known HEMI exhaust manifold bolt failure issue persists on 2023 models.
- MAF Sensor Issue (25% likelihood) – Contamination, especially with aftermarket intakes popular on performance models.
- Fuel System Problem (20% likelihood) – Injector or fuel pump issues affecting Bank 2 fuel delivery.
Diagnosis
- Check warranty – The 2023 Challenger should be under Stellantis warranty.
- Compare bank fuel trims – Isolate Bank 2.
- Exhaust manifold check – Listen for cold-start ticking.
- Smoke test and component testing – MAF, injectors, fuel pressure.
Repair Costs
- Vacuum leak – $80–$500.
- Exhaust manifold – $200–$900.
- MAF sensor – $80–$250.
- Fuel system – $150–$500.
Warranty and Collectibility
Your 2023 Challenger should be covered under Stellantis's 3-year/36,000-mile basic and 5-year/60,000-mile powertrain warranty. Use the dealer for warranty repairs. Keep all service records to document the car's maintenance history for future value.
Prevention
- Use premium fuel on V8 models
- Keep OEM air filtration to protect the MAF
- Inspect exhaust manifold bolts
- Follow the maintenance schedule religiously
- Document all repairs for the car's service history