P0175 - System to Rich (Bank 2)
You will more than likely not notice any drivability problems, although there may be symptoms such as a misfire.
A code P0175
may mean that one or more of the following has happened:
Possible Solutions include:
- The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled
- There could be a vacuum leak.
- There could be a fuel pressure or delivery problem - ie Idle Air Control Valve/Throttle Position Sensor/Fuel Pressure Regulator and/or others
- Inspect all vacuum and PCV hoses, replace if necessary
- Clean the MAF sensor. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
- Inspect fuel lines for cracks, leaks, or pinches
- Check the fuel pressure at the fuel rail
- Check the fuel injectors, they may be dirty. Use fuel injector cleaner or get them professionally cleaned/replaced.
- Check for an exhaust leak before the first oxygen sensor (this is unlikely to cause the problem, but it is possible)