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P0174 2017 Chevrolet Silverado Code - Fuel Trim System Lean Bank 2

Quick Answer

The diagnostic trouble code P0174 on a 2017 Chevrolet Silverado indicates that the fuel trim system on bank 2 is running too lean. Common causes include Vacuum leak in the intake system, Faulty fuel injector 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 2017 Chevrolet Silverado indicates Fuel Trim System Lean Bank 2.
Common causes
Common causes include Vacuum leak in the intake system, Faulty fuel injector 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P0174 2017 Chevrolet Silverado Description

The diagnostic trouble code P0174 on a 2017 Chevrolet Silverado indicates that the fuel trim system on bank 2 is running too lean. This means that the engine is receiving too much air and not enough fuel, leading to a potential imbalance in the air-fuel mixture. The fuel trim system is responsible for adjusting the air-fuel mixture to maintain optimal combustion efficiency. When the system detects that the mixture is too lean, it typically means that there is an issue with either too much air entering the system or not enough fuel being delivered.

OBDII Code P0174 2017 Chevrolet Silverado - Fuel Trim System Lean Bank 2
P0174 2017 Chevrolet Silverado Code - Fuel Trim System Lean Bank 2

Common Causes of P0174 2017 Chevrolet Silverado

  1. Vacuum leak in the intake system
  2. Faulty fuel injector on bank 2
  3. Clogged fuel filter restricting fuel flow
  4. Malfunctioning oxygen sensor on bank 2
  5. Issue with mass airflow sensor

Symptoms of P0174 2017 Chevrolet Silverado

  1. Rough idle or engine hesitation
  2. Decreased fuel efficiency
  3. Engine misfires or stalls
  4. Illuminated check engine light
  5. Strong fuel smell from exhaust

How to Fix P0174 2017 Chevrolet Silverado

  1. Perform a visual inspection of the intake system for any signs of vacuum leaks. Replace or repair any damaged hoses or gaskets.
  2. Check the fuel injectors on bank 2 for proper operation. Clean or replace any injectors that are not functioning correctly.
  3. Replace the fuel filter to ensure proper fuel flow to the engine.
  4. Test and replace the oxygen sensor on bank 2 if necessary.
  5. Inspect and clean the mass airflow sensor to ensure accurate readings.

Cost to Fix P0174 2017 Chevrolet Silverado

The cost of repairing a fuel trim system lean condition on a 2017 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, parts such as fuel injectors, oxygen sensors, or mass airflow sensors can range from $50 to $200 each, while a fuel filter may cost around $20 to $50. Labor costs at auto repair shops typically range between $80 and $150 per hour, with the total repair cost likely falling between $200 and $800. However, it is important to note that these estimates are rough averages, and actual costs may vary based on factors such as location, vehicle make and model, and the extent of the repair needed.

What does this mean?

Tech Notes for P0174 2017 Chevrolet Silverado

The P0174 code means that more air than gasoline is detected in the exhaust gases exiting the combustion chamber. If the P0174 is set in along with the P0171 code, it is highly likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the Mass Air Flow (MAF) Sensor. If the problem persists the MAF or Front Heated Oxygen (O2) Sensor will need to be replaced.



Click Here to Learn What is Bank 1 and Bank 2

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0174 2017 Chevrolet Silverado Code

1. What does OBDII code P0174 on a 2017 Chevrolet Silverado indicate?

- Code P0174 means "Fuel Trim System Lean Bank 2," indicating that the engine is running too lean on bank 2 (cylinder bank that doesn't contain cylinder 1).

2. What are the common symptoms of OBDII code P0174 on a 2017 Chevrolet Silverado?

- Common symptoms include rough idle, lack of power, hesitation or stalling, poor fuel efficiency, and illuminated Check Engine Light.

3. What are the possible causes of OBDII code P0174 on a 2017 Chevrolet Silverado?

- Causes may include a vacuum leak, faulty oxygen sensor, fuel injector issues, intake air leaks, clogged fuel filter, or a malfunctioning mass airflow sensor.

4. How can I diagnose the OBDII code P0174 on a 2017 Chevrolet Silverado?

- Diagnosis involves using an OBDII scanner to retrieve the code, inspecting for vacuum leaks, checking the oxygen sensor and mass airflow sensor, and testing fuel pressure and injectors.

5. Can a dirty or clogged air filter trigger code P0174 on a 2017 Chevrolet Silverado?

- Yes, a dirty or clogged air filter can disrupt the air-fuel mixture, leading to a lean condition and triggering code P0174.

6. Is it safe to continue driving a 2017 Chevrolet Silverado with OBDII code P0174?

- It's generally not recommended to drive extensively with code P0174 as it can lead to poor engine performance and potential damage if left unresolved.

7. How can I repair OBDII code P0174 on a 2017 Chevrolet Silverado?

- Repairs may involve fixing vacuum leaks, replacing faulty oxygen sensors, cleaning or replacing the mass airflow sensor, addressing fuel delivery issues, and ensuring proper air intake.

8. Can a bad catalytic converter cause OBDII code P0174 on a 2017 Chevrolet Silverado?

- A failing catalytic converter can be a potential cause of code P0174, as it may not efficiently process the excess oxygen in a lean fuel mixture.

9. Will resetting the Check Engine Light resolve OBDII code P0174 on a 2017 Chevrolet Silverado?

- Simply clearing the code may temporarily turn off the Check Engine Light, but it won't fix the underlying issue causing code P0174. The problem should be diagnosed and repaired.

10. How can regular maintenance help prevent OBDII code P0174 on a 2017 Chevrolet Silverado?

- Regular maintenance, including air filter replacement, fuel system cleaning, and sensor inspections, can help prevent issues that may trigger code P0174 and ensure optimal engine performance.

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