P0175 — System Too Rich (Bank 2)
Category: Powertrain Severity: Medium
Updated:
DTC code P0175 means: System Too Rich (Bank 2). It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include leaking injector on bank 2, fuel pressure too high and dirty or faulty MAF sensor; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Leaking injector on bank 2
- Fuel pressure too high
- Dirty or faulty MAF sensor
- Failed bank 2 O2 sensor
- Clogged air filter
Symptoms
- Black smoke
- Fuel smell
- Higher fuel consumption
- Rough idle
How to diagnose it step by step
- Check the air filter.
- Clean the MAF.
- Measure fuel pressure.
- Check bank 2 injectors.
- Check the bank 2 O2 sensor.
How to fix it
If P0172 also appears, the problem is common to both banks (MAF, fuel pressure). If only P0175 is set, focus on bank 2 injectors and O2 sensor.
Estimated repair cost
MAF cleaning: $20–70. O2 sensor: $100–300. Injector: $100–400.
Frequently asked questions
What does DTC code P0175 mean?
System Too Rich (Bank 2).
Is code P0175 serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P0175?
Short-term driving is OK, but a prolonged rich mixture damages the catalyst.
Related codes
P0174 P0172 P0171 P0161 P0190 P0191 P0157 P0193 P0156 P0155
Refine by car make
- Audi P0175: O2 sensor or fuel pressure.
- BMW P0175: Injectors or O2 sensor.
- Citroën P0175: MAF/MAP sensor or leak.
- Dacia P0175: MAF/MAP sensor.
- Fiat P0175: MAF/MAP sensor.
- Ford P0175: O2 sensor or leaking injector.
- Honda P0175: O2 sensor or injector.
- Hyundai P0175: MAF sensor.
- Kia P0175: MAF sensor.
- Mazda P0175: MAF sensor.
- Mercedes-Benz P0175: MAF sensor or intake leak.
- Nissan P0175: O2 sensor or injector.
- Opel P0175: O2 sensor or injector.
- Peugeot P0175: O2 sensor or injector.
- Renault P0175: O2 sensor or injector.
- Toyota P0175: O2 sensor or injector.
- Volkswagen P0175: O2 sensor or fuel pressure.
- Volvo P0175: MAF sensor.
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