P0174 2015 GMC Sierra Code - Fuel Trim System Lean Bank 2
Quick Answer
The P0174 code for a 2015 GMC Sierra indicates a Fuel Trim System Lean Bank 2 issue. Common causes include Vacuum leak in the intake system, Faulty oxygen sensor on bank 2, Clogged fuel filter restricting fuel flow. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0174 2015 GMC Sierra indicates Fuel Trim System Lean Bank 2.
- Common causes
- Common causes include Vacuum leak in the intake system, Faulty oxygen sensor on bank 2, Clogged fuel filter restricting fuel flow.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0174 2015 GMC Sierra Description
The P0174 code for a 2015 GMC Sierra indicates a Fuel Trim System Lean Bank 2 issue. This means that the engine control module (ECM) has detected that the air-fuel mixture is too lean on the second bank of cylinders in the vehicle's engine. The fuel trim system is responsible for adjusting the air-fuel mixture to ensure optimal combustion and engine performance. When the system is running lean, it means there is too much air and not enough fuel in the mixture, which can lead to a variety of performance issues.
Common Causes of P0174 2015 GMC Sierra
- Vacuum leak in the intake system
- Faulty oxygen sensor on bank 2
- Clogged fuel filter restricting fuel flow
- Malfunctioning fuel pressure regulator
- Issue with the mass airflow sensor
Symptoms of P0174 2015 GMC Sierra
- Rough idle
- Engine hesitation or stumbling during acceleration
- Decreased fuel efficiency
- Check Engine Light illuminated
- Engine misfires
How to Fix P0174 2015 GMC Sierra
- Perform a thorough inspection of the intake system for any vacuum leaks. Replace any damaged hoses or gaskets.
- Test and replace the oxygen sensor on bank 2 if it is faulty.
- Check and replace the fuel filter if it is clogged, restricting fuel flow to the engine.
- Inspect and potentially replace the fuel pressure regulator if it is not functioning properly.
- Test the mass airflow sensor for proper operation and replace if necessary.
Cost to Fix P0174 2015 GMC Sierra
The typical repair costs for addressing a P0174 code on a 2015 GMC Sierra can vary depending on the specific cause of the issue. Parts such as an oxygen sensor, fuel filter, or mass airflow sensor can range from $50 to $200 each, depending on the quality and brand. Labor costs can also vary, but on average, you can expect to pay between $200 and $500 for the diagnosis and repair of this issue. Keep in mind that rates at auto repair shops can vary based on location, vehicle make and model, and engine type, so it is advisable to obtain a specific estimate from a local shop.
Tech Notes for P0174 2015 GMC Sierra
Click Here to Learn What is Bank 1 and Bank 2
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