P0175 on Your 2022 Honda CR-V
A P0175 code on your 2022 Honda CR-V means bank 2 is running rich — the engine is receiving excess fuel. The 2022 CR-V (5th generation) uses a 1.5L turbocharged four-cylinder engine (190 hp, 179 lb-ft) with direct injection, paired with a CVT. There's also a hybrid variant with a 2.0L Atkinson-cycle engine. The P0175 code primarily applies to the 1.5T powertrain and indicates that the ECM's fuel trim corrections have exceeded their normal operating range.
How It Shows Up
- Check engine light on the dashboard
- Noticeable fuel smell from exhaust
- Rough idle or mild vibration at stops
- Black residue around the tailpipe
- Fuel economy below the rated 28–34 mpg
- Possible engine misfires from fouled spark plugs
Why Your 2022 CR-V Is Running Rich
1. Failing O2 Sensor (High Likelihood)
The oxygen sensors on the 2022 CR-V monitor exhaust gas composition for precise fuel trim adjustments. A sensor that reads biased lean causes the ECM to add extra fuel, creating an actual rich condition. With 2-4 years of service and potentially 30,000-60,000 miles, premature sensor degradation is the most common cause. The upstream air-fuel ratio sensor is the primary suspect. Monitor sensor voltage and response time with a scan tool.
2. Leaking Fuel Injector (Medium Likelihood)
The 1.5T's direct injection system operates at very high pressures. Carbon buildup on injector tips or seal degradation can prevent full closure, allowing fuel to drip between injection events. The CR-V's engine compartment runs hot due to the compact packaging, which accelerates seal aging. An injector leak-down test or cylinder-by-cylinder fuel trim comparison helps identify the faulty injector.
3. High Fuel Pressure (Medium Likelihood)
The electronic fuel pressure control system manages rail pressure via the high-pressure fuel pump. A faulty pressure sensor or a sticking pressure control valve can cause the system to maintain higher-than-normal pressure. Use a scan tool to monitor fuel rail pressure and compare to Honda's specifications. Consistent readings above spec confirm this issue.
4. Intake Leak Downstream of MAF (Low Likelihood)
While intake leaks typically cause lean codes, a specific type of leak downstream of the MAF sensor can confuse the ECM's fuel calculations under certain conditions. This is uncommon but worth checking if the primary suspects are cleared. Inspect the intake boot, throttle body gasket, and all connections between the MAF and the engine.
Diagnostic Steps
- Read all codes — Check for P0172 (bank 1 rich), misfire codes, or EVAP system codes.
- Monitor fuel trims — LTFT below -10% on bank 2 confirms the ECM is actively reducing fuel delivery.
- Test O2/A-F sensors — Check response time, voltage range, and compare between sensors.
- Inspect spark plugs — Fuel-fouled plugs indicate excess fuel on specific cylinders.
- Measure fuel pressure — Verify rail pressure at idle, under load, and at key-off.
Repair Costs
- O2 sensor replacement: $100–$270
- Fuel injector replacement: $150–$400
- Fuel pressure sensor or valve: $160–$350
- MAF sensor replacement: $90–$220
Warranty Check
The 2022 CR-V may still be within Honda's 3-year/36,000-mile basic warranty depending on your purchase date and mileage. The powertrain warranty extends to 5 years/60,000 miles. O2 sensors and catalytic converters are covered under the federal emissions warranty for 8 years/80,000 miles. Contact your Honda dealer to check coverage before paying out of pocket.
DIY Options
The CR-V's engine bay offers reasonable access for DIY work. O2 sensor replacement is a straightforward job with basic tools. Spark plug inspection takes 20-30 minutes. MAF sensor cleaning is a 10-minute task. Fuel injector work on the direct injection system is more involved and benefits from professional tools and experience.
Don't Ignore P0175
The CR-V's 1.5T engine is susceptible to fuel dilution — a known concern where excess fuel washes past piston rings into the engine oil. Running rich with P0175 worsens this. Check your oil level regularly. If it's above the full mark or smells like gasoline, change the oil immediately and address P0175 promptly.