What P0174 Means on Your 2022 Dodge Challenger
When your 2022 Dodge Challenger triggers a P0174 code, the PCM has detected that Bank 2 is running too lean. The 2022 Challenger offers the 3.6L Pentastar V6 (303 hp), 5.7L HEMI V8 (375 hp), 6.4L HEMI V8 (485 hp), and the supercharged 6.2L (717+ hp). Bank 2 is the passenger side on all models. A lean condition means the cylinders on that side are getting too much air relative to fuel.
Performance cars and lean conditions don't mix well. Even moderate spirited driving with a lean mixture can lead to detonation and engine damage.
Symptoms
- Check engine light on
- Rough idle
- Reduced power output
- Poor fuel economy
- Hesitation on acceleration
- Possible knock under load
Common Causes
- Vacuum Leak (30% likelihood) – Intake manifold gaskets and hoses age and develop leaks.
- Exhaust Manifold Leak (25% likelihood) – HEMI exhaust manifold bolt failures create leaks that affect O2 sensor readings.
- MAF Sensor Issue (25% likelihood) – Common with aftermarket intakes. Oil contamination on the MAF causes lean fueling.
- Fuel Delivery Problem (20% likelihood) – Weak pump, clogged injectors, or MDS-related carbon buildup.
Diagnosis
- Compare bank fuel trims – Isolate Bank 2.
- Exhaust manifold inspection – Listen for cold-start ticking.
- Smoke test – Find vacuum leaks.
- MAF and fuel system testing – Clean MAF, test fuel pressure and injectors.
Repair Costs
- Vacuum leak – $80–$500.
- Exhaust manifold – $200–$900.
- MAF sensor – $80–$250.
- Fuel system – $150–$500.
DIY Feasibility
The Challenger community provides outstanding DIY support. MAF cleaning is simple. Exhaust manifold bolt extraction on HEMIs is a well-documented (if sometimes frustrating) job. Multiple YouTube channels cover these repairs on Mopar muscle cars.
Prevention
- Use premium fuel on V8 models
- Stick with dry-element air filters
- Inspect exhaust manifold bolts regularly
- Follow the maintenance schedule
- Don't push the engine hard if you suspect lean running