P0175 Honda Accord
System Too Rich (Bank 2) · Powertrain Code · Medium · Repair: Moderate
What is P0175?
The engine is running rich on bank 2. Same causes as P0172 but affecting the opposite cylinder bank.
When the Honda Accord triggers code P0175 (system too rich (bank 2)), it typically points to an issue in the powertrain system. Below you'll find the most common causes, symptoms, and repair options specific to the Honda Accord.
This repair is rated moderate, meaning some experience and specialty tools required.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your Honda Accord.
Common Causes on Honda Accord
- Dirty MAF sensor on V6 J35Y models (Bank 2 rich condition)
- Vacuum leak on rear bank intake runner
- Leaking fuel injector on cylinders 1-3 (rear bank)
- Failing rear bank O2 sensor giving false lean reading causing rich compensation
Symptoms
- Check Engine Light on
- Fuel smell from exhaust
- Poor fuel economy
- Rough idle or misfire feel
- Black spark plug tips on rear bank cylinders
Notes for Honda Accord
P0175 is bank-specific on V6 Pilot and Accord models — focus diagnostics on the rear bank (cylinders 1-3 on Honda V6).