P0175 Chevy Silverado: System Too Rich (Bank 2)
Quick Answer: What is P0175?
The P0175 code means the engine's Bank 2 is running "rich," which is the opposite of lean. There is too much fuel or not enough air in the mixture. On a Chevy Silverado, this is often caused by leaking fuel injectors or a faulty fuel pressure regulator.
Common Symptoms
- Strong smell of gasoline from the exhaust.
- Significant drop in fuel economy.
- Rough idling or engine "hunting" for RPMs.
- Black smoke from the tailpipe during acceleration.
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Most Likely Causes
- Dirty MAF Sensor: Sending incorrect high-airflow signals.
- Leaking Fuel Injector: Dripping extra fuel into Bank 2 cylinders.
- Faulty Oxygen (O2) Sensor: Providing false rich readings.
- High Fuel Pressure: Often due to a failed regulator.
Estimated Repair Costs
| Repair | Cost (USD) |
|---|---|
| MAF Sensor Cleaning | $10.00 |
| O2 Sensor Replacement | $120 - $200 |
| New Fuel Injector | $150 - $300 |