P0175 on the 2022 Honda Odyssey
A P0175 code on your 2022 Honda Odyssey means the ECM detected a rich condition on bank 2 — excess fuel in the combustion mixture. The 2022 Odyssey uses the J35Y6 3.5L i-VTEC V6 engine (280 hp, 262 lb-ft) with a 10-speed automatic transmission. This port-injected V6 has two cylinder banks, and P0175 specifically identifies that bank 2 (the rear bank) has too much fuel relative to air.
Signs Your Odyssey Is Running Rich
- Check engine light on the dash
- Exhaust has a strong gasoline smell
- Rough or shaky idle
- Black soot around the tailpipe
- Gas mileage worse than the rated 19–28 mpg
- Engine stumbles or feels sluggish
What's Causing P0175
1. Failing Bank 2 O2 Sensor (High Likelihood)
The upstream oxygen sensor on bank 2 is the primary fuel control sensor for that cylinder bank. On the 2022 Odyssey with 2-4 years of service, a prematurely degraded sensor can read falsely lean, causing the ECM to add extra fuel. The bank 2 sensor on the V6 is tucked against the firewall where heat accumulates. Monitor sensor voltage and switching frequency with a scan tool to identify a lazy or biased sensor.
2. Leaking Bank 2 Fuel Injector (Medium Likelihood)
The port fuel injectors on the 3.5L V6 can develop seal or seating issues over time. A bank 2 injector that doesn't close completely drips fuel into its cylinder between injection events. This is identifiable through spark plug inspection — a fuel-fouled plug with wet, dark deposits points to the leaking injector. On the Odyssey, bank 2 injectors are located on the intake manifold's rear section.
3. Elevated Fuel Pressure (Medium Likelihood)
If the fuel pressure regulator fails in the high-pressure position, every injector delivers more fuel per pulse than commanded. This creates a rich condition across all cylinders. Test fuel rail pressure at idle — Honda specifies approximately 47-53 psi with vacuum connected. Persistent readings above specification indicate a regulator issue.
4. Contaminated MAF or Intake Issue (Low Likelihood)
An overreading MAF sensor causes the ECM to inject excess fuel. This would typically affect both banks equally, triggering both P0172 and P0175. If only P0175 is present, focus on bank 2-specific components first. A MAF cleaning is still worthwhile as a low-cost diagnostic step.
Diagnostic Process
- Check for companion codes — P0172 alongside P0175 means both banks are rich (systemic issue).
- Compare bank fuel trims — Use a scan tool to check LTFT differences between bank 1 and bank 2.
- Test bank 2 O2 sensor — Monitor switching frequency and compare to bank 1 sensor performance.
- Inspect bank 2 spark plugs — Look for fuel fouling on rear bank cylinders.
- Check fuel pressure — Verify regulator operation and fuel rail pressure.
Repair Costs
- O2 sensor (bank 2): $120–$300
- Fuel injector replacement: $110–$310 per injector
- Fuel pressure regulator: $130–$290
- MAF sensor: $90–$220
Warranty Status
Your 2022 Odyssey should still be within Honda's 3-year/36,000-mile basic warranty depending on mileage. The powertrain warranty extends to 5 years/60,000 miles. O2 sensors are covered under the federal emissions warranty for 8 years/80,000 miles. Check with your Honda dealer to verify coverage before paying for repairs.
Minivan Owner Advice
Your Odyssey is a family hauler, and reliability matters. P0175 isn't an emergency, but don't let it linger. Running rich wastes gas (you'll feel it at the pump), can cause misfires that make the ride rough, and gradually damages the catalytic converters. The Odyssey's bank 2 catalytic converter replacement runs $800-$1,800, making a $120-$300 O2 sensor repair a smart investment. Address P0175 within two weeks.