P0175 on the 2024 Ram 1500: V8 HEMI and V6 Considerations
The 2024 Ram 1500 is available with several engine options, but the most common are the 5.7L HEMI V8 (395 hp) with eTorque mild-hybrid technology and the 3.6L Pentastar V6 (305 hp). Both are V-configuration engines with a true Bank 2, making P0175 a natural diagnostic code for these powertrains. Bank 2 on the HEMI is typically the passenger side of the engine (cylinders 2, 4, 6, 8), and on the Pentastar V6 it's the rear bank.
P0175 means the ECM has detected that Bank 2 is running too rich — the fuel trims have exceeded their correction range on the rich side. On a full-size truck like the Ram 1500, this can significantly impact fuel economy given the engine's already substantial fuel consumption.
Symptoms in Your Ram 1500
- Check engine light on
- Fuel economy dropping below the expected 15-22 MPG range (HEMI) or 20-26 MPG (V6)
- Rough idle, especially when the truck is in gear at a stop
- Exhaust smells rich
- Black soot on tailpipe
- HEMI may have reduced cylinder deactivation (MDS) efficiency
- Sluggish acceleration under load or when towing
Top Causes by Engine
1. Dirty or Failed MAF Sensor — High Likelihood (Both Engines)
The Ram 1500's MAF sensor sits in the large-diameter air intake duct. On trucks, the MAF is exposed to more dust and debris than on passenger cars, especially if you drive on unpaved roads or in construction areas. The HEMI's large displacement draws enormous volumes of air, making even small MAF errors significant. The V6 is similarly affected. A contaminated MAF underreads airflow, and the ECM responds by not reducing fuel delivery enough. Cleaning or replacing the MAF is often the first and most successful fix.
2. O2 Sensor Failure on Bank 2 — Medium Likelihood
The upstream O2 sensor on Bank 2 provides critical feedback for fuel trim calculations. On the HEMI, the O2 sensor is tucked between the exhaust manifold and the frame, making it susceptible to heat damage and difficult to access. The V6's sensor position varies. A sluggish or biased sensor causes the ECM to add unnecessary fuel. On the HEMI with MDS cylinder deactivation, O2 sensor issues can also confuse the ECM during transitions between 4 and 8 cylinder operation.
3. Fuel Injector Issues — Medium Likelihood
The 5.7L HEMI uses multi-port fuel injection with one injector per cylinder. At the pressures and temperatures inside the HEMI's combustion chambers, injectors work hard. A leaking or stuck injector on Bank 2 (cylinders 2, 4, 6, or 8) delivers excess fuel. The Pentastar V6 can have similar issues. Injector cleaning with a professional flush machine can sometimes resolve the problem; otherwise, replacement of the faulty injector is needed.
4. Fuel Pressure Regulator — Low Likelihood
The fuel pressure regulator on the Ram 1500 maintains consistent rail pressure. If it allows excessive pressure, all Bank 2 injectors over-deliver. This is more common on older trucks but can occur on newer models. Testing fuel pressure at the rail with a gauge at idle and under load confirms or eliminates this cause.
Diagnostic Approach
- Scan for all DTCs — check for companion codes on Bank 1 or misfire codes
- Monitor fuel trims at idle and 2,000 RPM — compare Bank 1 vs Bank 2
- Test MAF sensor readings against Ram specifications for your engine
- Check O2 sensor response time on Bank 2 — compare to Bank 1
- Verify fuel pressure at rail
- Perform injector balance test if other tests are inconclusive
Repair Costs
- MAF sensor: $100–$250
- O2 sensor: $120–$300
- Fuel injector (HEMI, each): $80–$200
- Fuel pressure regulator: $150–$350
The 2024 Ram 1500 is covered by a 3-year/36,000-mile basic warranty and 5-year/60,000-mile powertrain warranty.
DIY Feasibility
The Ram 1500's engine bay is spacious, making MAF sensor replacement straightforward. O2 sensor access on the HEMI can be challenging due to the sensor's position between the exhaust manifold and frame. HEMI fuel injectors are accessible once the fuel rail is removed — this is an intermediate DIY job. For warranty-covered vehicles, the dealer is the best first stop.