P0175: System Too Rich (Bank 2)
Same as P0172 but on bank 2. Both together point to something affecting the whole engine.
Green, yellow, red: three ways P0175 can look
The same code can be a quick fix or a reason to pull over. Match your situation to the closest example.
Keep an eye on it
Code set once, drives normally.
Schedule a repair
Fuel smell or poor economy. Get it diagnosed.
Stop and get help
Black smoke or a flashing light. Stop driving.
Symptoms you might notice
- Fuel smell
- Poor fuel economy
- Black smoke
Common causes, cheapest first
- Leaking injector on bank 2
- High fuel pressure
- Dirty MAF sensor
- Bad coolant temperature sensor
What you can check before calling
- Check whether P0172 is also set
- Check the air filter
A code points to a system, not a part. Replacing parts based on the code alone is how people spend money without fixing the problem. Testing confirms the cause first.
Generic codes (second character 0) mean the same thing on every vehicle. Some manufacturers add their own details, so check service information for your exact vehicle.
Related codes
More fuel & air mixture codes
Look up another code
Cummins fault code (like 1922), J1939 SPN and FMI (like SPN 3251 FMI 0), or an OBD-II code (like P0420).
Questions
What does P0175 mean?
P0175 means "System Too Rich (Bank 2)". Same as P0172 but on bank 2. Both together point to something affecting the whole engine.
Can I drive with code P0175?
It depends on what the vehicle is doing. Green: Code set once, drives normally. Yellow: Fuel smell or poor economy. Get it diagnosed. Red: Black smoke or a flashing light. Stop driving.
What causes P0175?
The most common causes are: leaking injector on bank 2; high fuel pressure; dirty MAF sensor.
Is P0175 a serious code?
It can be. Black smoke or a flashing light. Stop driving.
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