What P0175 Means on the 2022 Toyota RAV4
The P0175 code on your 2022 Toyota RAV4 means bank 2 is running rich — the engine is receiving too much fuel. The 2022 RAV4 uses the A25A-FKS 2.5L Dynamic Force four-cylinder (203 hp) with D-4S dual injection, or various hybrid powertrains. P0175 applies to the conventional 2.5L engine. At 2-4 years old, this code may be covered under Toyota's warranty.
Symptoms
- Check engine light on
- Fuel smell from the exhaust
- Rough idle
- Black soot at the tailpipe
- Fuel economy below the rated 27–35 mpg
- Engine stumble or hesitation
Common Causes
1. O2 Sensor Issue (High Likelihood)
The air-fuel ratio sensor on the 2022 RAV4 can develop premature degradation or have a factory defect. A sensor reading falsely lean causes the ECM to add excess fuel. Toyota's wideband sensors are generally reliable, but individual failures occur. Monitor sensor output with a scan tool to verify performance against specifications.
2. D-4S Fuel Injector Leak (Medium Likelihood)
The 2.5L's dual injection system uses both port and direct injectors. Either type can develop sealing issues. Direct injectors operate at extreme pressures and are more susceptible. A leaking injector adds fuel when it should be sealed. Check spark plugs for fuel fouling to identify affected cylinders.
3. Fuel Pressure Running High (Medium Likelihood)
The D-4S system's dual fuel pressure circuits require precise management. A faulty pressure sensor, control valve, or pump can cause elevated rail pressure. Use a scan tool to monitor both port and direct injection rail pressures during driving.
4. EVAP System Issue (Low Likelihood)
A purge valve stuck open feeds fuel vapor continuously into the intake. This is diagnosable by commanding the valve on/off with a scan tool.
Diagnostic Approach
- Check for TSBs — Toyota may have service bulletins for the 2022 RAV4.
- Monitor fuel trims — Negative LTFT confirms the ECM is cutting fuel delivery.
- Test sensors — Verify air-fuel ratio sensor output and response time.
- Check fuel pressure — Verify both injection circuits.
- Inspect spark plugs — Look for fuel fouling patterns.
Repair Costs
- O2/A-F sensor: $100–$270
- Fuel injector: $130–$370
- Fuel pressure sensor/valve: $130–$310
- EVAP purge valve: $70–$170
Warranty Check
The 2022 RAV4 should be within Toyota's 3-year/36,000-mile basic warranty and 5-year/60,000-mile powertrain warranty. O2 sensors are covered for 8 years/80,000 miles under federal emissions warranty. Contact your dealer to verify coverage.
RAV4 Reliability
The RAV4 is one of the most reliable compact SUVs available. P0175 is a minor component issue easily resolved. Once repaired, your RAV4 should return to its excellent normal operation. Fix it within two weeks to prevent catalytic converter stress from the rich condition.