What Does the P0175 Code Mean on Your 2022 Dodge Challenger?
If your 2022 Dodge Challenger is throwing a P0175 trouble code, the engine control module (ECM) is telling you that bank 2 of your engine is running too rich — meaning there's too much fuel relative to air in the combustion mixture. On the Challenger's 5.7L HEMI V8 (or the 6.4L 392 HEMI if you have the Scat Pack), bank 2 refers to the passenger-side cylinder bank. This isn't just an annoyance — a rich-running condition wastes fuel, fouls spark plugs, and can damage your catalytic converters over time.
Common Symptoms You'll Notice
- Check engine light illuminated on the dashboard
- Reduced fuel economy — sometimes noticeably worse on HEMI engines
- Black smoke from the exhaust, especially under acceleration
- Rough idle or slight engine stumble
- Strong fuel smell from the exhaust
- Possible hesitation during hard acceleration
Top Causes of P0175 on the 2022 Challenger HEMI
1. Faulty Mass Airflow (MAF) Sensor
The MAF sensor on the Challenger sits in the intake tract and measures incoming air volume. When it gets dirty or fails, it underreports airflow, causing the ECM to deliver too much fuel. On the HEMI's large-bore intake, oil residue from aftermarket cold air intakes is a frequent culprit. Cleaning the MAF with dedicated sensor cleaner often resolves the issue. Replacement runs $80–$180 for the part.
2. Leaking or Stuck Fuel Injectors
The 5.7L and 6.4L HEMI engines use high-flow fuel injectors. If one or more on bank 2 (cylinders 2, 4, 6, 8) is leaking or stuck partially open, excess fuel enters the combustion chamber. Injector issues are common after 50,000 miles on these engines. A fuel injector cleaning service costs $100–$200, while replacement injectors run $50–$120 each plus labor.
3. Failing Oxygen (O2) Sensor on Bank 2
The upstream O2 sensor on bank 2 provides real-time feedback to the ECM about the air-fuel ratio. A sluggish or failed sensor can send incorrect readings, causing the ECM to add fuel unnecessarily. On the Challenger, bank 2 upstream sensor replacement typically costs $150–$300 including labor at an independent shop.
4. Fuel Pressure Regulator Issues
The HEMI's fuel system operates at specific pressures. A stuck or failing fuel pressure regulator can allow excessive fuel pressure, pushing too much fuel through the injectors on both banks — though the P0175 points specifically to bank 2. Regulator replacement runs $200–$400 depending on your engine variant.
Diagnostic Steps
- Scan for additional codes — P0172 (bank 1 rich) appearing alongside P0175 points to a system-wide issue like fuel pressure or MAF
- Check short-term and long-term fuel trims on bank 2 using a scan tool — values beyond -10% indicate significant rich correction
- Inspect the MAF sensor for contamination and clean if needed
- Check for vacuum leaks around the intake manifold (paradoxically, some vacuum leaks can cause rich codes)
- Test fuel pressure with a gauge — the 5.7L HEMI should hold 58 psi at idle
- Monitor O2 sensor voltage — it should oscillate between 0.1V and 0.9V; stuck above 0.45V suggests a problem
Can You Drive With a P0175 Code?
You can drive short distances with this code, but don't ignore it. A rich condition dumps unburned fuel into the catalytic converter, and on the Challenger, those cats are expensive — $800 to $1,500 each. The longer you drive with a rich condition, the higher the chance of catalytic converter damage. Get it diagnosed within a week or two.
DIY vs. Professional Repair
MAF sensor cleaning is a straightforward DIY job requiring only MAF cleaner spray ($8–$12) and basic hand tools. O2 sensor replacement is moderately difficult — you'll need a sensor socket and decent access underneath the car. Fuel injector and pressure regulator work on the HEMI is more involved and typically best left to a professional unless you have intermediate mechanical skills.