P0174 2018 GMC Sierra Code - Fuel Trim System Lean Bank 2
Quick Answer
The P0174 code on a 2018 GMC Sierra indicates that the fuel trim system on bank 2 is running lean. Common causes include Vacuum leaks in the intake system, Faulty oxygen sensor on bank 2, Clogged fuel injectors on bank 2. 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 2018 GMC Sierra indicates Fuel Trim System Lean Bank 2.
- Common causes
- Common causes include Vacuum leaks in the intake system, Faulty oxygen sensor on bank 2, Clogged fuel injectors on bank 2.
- 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 2018 GMC Sierra Description
The P0174 code on a 2018 GMC Sierra indicates that the fuel trim system on bank 2 is running lean. This means that there is too much air and not enough fuel in the air-fuel mixture being delivered to the engine cylinders. This can lead to a variety of performance issues, including reduced power, rough idling, hesitation, and potentially even engine stalling.
Common Causes of P0174 2018 GMC Sierra
- Vacuum leaks in the intake system
- Faulty oxygen sensor on bank 2
- Clogged fuel injectors on bank 2
- Fuel pressure regulator issues
- Dirty or clogged air filter
Symptoms of P0174 2018 GMC Sierra
- Reduced engine power
- Rough or uneven idling
- Hesitation or stumbling during acceleration
- Engine stalling
- Increased fuel consumption
How to Fix P0174 2018 GMC Sierra
- Perform a visual inspection of the intake system for any signs of vacuum leaks. Repair or replace any damaged hoses or gaskets.
- Test the oxygen sensor on bank 2 to ensure it is functioning properly. Replace if necessary.
- Clean or replace clogged fuel injectors on bank 2 to ensure proper fuel delivery.
- Check and adjust the fuel pressure regulator to ensure correct fuel pressure.
- Replace the air filter if dirty or clogged to allow for proper airflow into the engine.
Cost to Fix P0174 2018 GMC Sierra
The cost of repairing a P0174 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts and labor for this type of repair can range from $200 to $500. It's important to note that diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. It's advisable to check with local shops to get a more accurate estimate based on your location and vehicle specifics.
Tech Notes for P0174 2018 GMC Sierra
Click Here to Learn What is Bank 1 and Bank 2
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