P050D 2017 GMC Sierra Code - Cold Start Rough Idle
Quick Answer
During a cold start, the Engine Control Module (ECM) commands dual-pulse mode during Open Loop operation to improve cold start emissions. Common causes include Faulty Fuel Injector, Fuel Injector harness is open or shorted, Fuel Injector circuit poor electrical connection. 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 Fuel Injector, Fuel Injector harness is open or shorted, Fuel Injector circuit poor electrical connection.
- 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.
Code P050D 2017 GMC Sierra Description
What are the Possible Causes of the DTC P050D 2017 GMC Sierra?
- Faulty Fuel Injector
- Fuel Injector harness is open or shorted
- Fuel Injector circuit poor electrical connection
How to Fix the DTC P050D 2017 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
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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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P050D 2017 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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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