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Engine-Codes – GMC – P050D 2017 GMC Sierra

P050D 2017 GMC Sierra Code - Cold Start Rough Idle

Quick Answer

The P050D code for a 2017 GMC Sierra indicates a cold start rough idle. Common causes include Faulty engine sensors, such as the coolant temperature sensor or intake air temperature sensor, Malfunctioning fuel injector, Vacuum leaks in the intake system. 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
P050D 2017 GMC Sierra indicates Cold Start Rough Idle.
Common causes
Common causes include Faulty engine sensors, such as the coolant temperature sensor or intake air temperature sensor, Malfunctioning fuel injector, Vacuum leaks in the intake system.
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 07, 2024
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Code P050D 2017 GMC Sierra Description

The P050D code for a 2017 GMC Sierra indicates a cold start rough idle. When a vehicle is started from a cold condition, the engine may experience rough idling or instability. This can lead to a noticeable shake or vibration in the engine and possibly the entire vehicle. The issue is usually more pronounced during cold weather or after the vehicle has been sitting for an extended period.

OBDII Code P050D 2017 GMC Sierra - Cold Start Rough Idle
P050D 2017 GMC Sierra Code - Cold Start Rough Idle

Common Causes of P050D 2017 GMC Sierra

  1. Faulty engine sensors, such as the coolant temperature sensor or intake air temperature sensor
  2. Malfunctioning fuel injector
  3. Vacuum leaks in the intake system
  4. Dirty or clogged air filter
  5. Issues with the ignition system, such as faulty spark plugs or ignition coils

Symptoms of P050D 2017 GMC Sierra

  1. Rough idle when starting the vehicle from a cold condition
  2. Engine vibrations or shaking during cold start
  3. Decreased fuel efficiency
  4. Check Engine Light may be illuminated on the dashboard
  5. Engine may stall or hesitate during acceleration

How to Fix P050D 2017 GMC Sierra

  1. Perform a diagnostic scan to retrieve the trouble code and identify the specific cause of the cold start rough idle.
  2. Inspect and test engine sensors to ensure they are functioning correctly.
  3. Check the fuel injector for proper operation and clean or replace if necessary.
  4. Inspect the air filter and replace if dirty or clogged.
  5. Check the ignition system components, such as spark plugs and ignition coils, for wear or damage and replace as needed.

Cost to Fix P050D 2017 GMC Sierra

The cost estimate for repairing a cold start rough idle issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, the repair cost for this issue can range from $100 to $500, including parts and labor. However, it's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to obtain quotes from local shops for a more accurate estimate.

What does this mean?

Tech Notes for P050D 2017 GMC Sierra

There is a factory service bulletin for the following Chevrolet models:
2014-2018 Chevrolet Silverado 1500
Condition: A vehicle may have a concern about a DTC P050D setting along with a P0300 after a cold startup. White smoke and/or coolant odor may come from the exhaust for an extended period of time at a cold start as well. It may also Run rough when warm, with a slight knock, no codes set.
Cause: Coolant getting into the cylinders. If there is coolant in the cylinder, the cylinder head will need to be replaced.





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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 P050D 2017 GMC Sierra Code

1. What does the OBDII code P050D mean on a 2017 GMC Sierra?

P050D indicates "Cold Start Rough Idle," meaning the engine experiences instability or rough idling during initial startup when the engine is cold.

2. What are the common symptoms of code P050D in a 2017 GMC Sierra?

Symptoms include a rough or shaky idle during cold starts, reduced engine performance, possible poor fuel economy, and the Check Engine Light turning on.

3. What causes the P050D code in a 2017 GMC Sierra?

Common causes include carbon buildup on the intake valves, faulty fuel injectors, issues with the ignition system (spark plugs or coils), or a vacuum leak.

4. Can a dirty air filter cause the P050D code in my 2017 GMC Sierra?

While a dirty air filter is not a primary cause, restricted airflow can contribute to poor combustion, which may worsen cold start rough idling.

5. How do I fix the P050D code on a 2017 GMC Sierra?

Repairs may include cleaning or replacing fuel injectors, replacing spark plugs or ignition coils, addressing carbon buildup, or repairing vacuum leaks.

6. Is it safe to drive with the P050D code on my 2017 GMC Sierra?

It’s generally safe to drive short distances, but prolonged driving could lead to engine damage, reduced performance, and higher repair costs.

7. How can I prevent the P050D code from occurring in the future?

Regular maintenance, including timely spark plug replacements, fuel system cleaning, and using high-quality fuel, can help prevent this code.

8. Will clearing the code fix the P050D issue on my 2017 GMC Sierra?

Clearing the code may turn off the Check Engine Light temporarily, but it won’t address the underlying issue causing the cold start rough idle.

9. Can low-quality fuel trigger the P050D code on my 2017 GMC Sierra?

Yes, poor-quality fuel can lead to incomplete combustion or carbon buildup, which may contribute to cold start rough idling and trigger the P050D code.

10. What diagnostic steps should be taken to troubleshoot the P050D code?

Diagnostics include checking for misfires, inspecting spark plugs and ignition coils, testing fuel injectors, and inspecting for vacuum leaks or carbon buildup.

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