P1339 2014 GMC Sierra Code - Cylinder 2 Glow Plug Offset Exceeded Learning Limit
Quick Answer
The Glow Plug Control Module has not learned the glow plug offset values. Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 2, Glow Plug 2 harness is open or shorted. 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
- P1339 2014 GMC Sierra indicates Cylinder 2 Glow Plug Offset Exceeded Learning Limit.
- Common causes
- Common causes include Perform Glow Plug Learn procedure, Faulty Glow Plug 2, Glow Plug 2 harness is open or shorted.
- 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 P1339 2014 GMC Sierra Description
What are the Possible Causes of the DTC P1339 2014 GMC Sierra?
- Perform Glow Plug Learn procedure
- Faulty Glow Plug 2
- Glow Plug 2 harness is open or shorted
- Glow Plug 2 circuit poor electrical connection
How to Fix the DTC P1339 2014 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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1339 2014 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.
Need more information about the P1339 2014 GMC Sierra code?
Need more information on how to fix the P1339 2014 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1339 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1339 2014 GMC Sierra Code
What does OBDII code P1339 mean on a 2014 GMC Sierra?
P1339 indicates that the Cylinder 2 Glow Plug Offset has exceeded the learning limit, meaning the glow plug system in that cylinder is not performing within acceptable parameters.
What are the common symptoms of code P1339 on a 2014 GMC Sierra?
Symptoms may include difficulty starting in cold weather, rough idling, increased emissions, and the Check Engine Light being illuminated.
What causes code P1339 to appear on a 2014 GMC Sierra?
Common causes include a faulty glow plug, damaged glow plug control module, wiring issues, or carbon buildup around the glow plug.
Can you drive with code P1339 on a 2014 GMC Sierra?
While the truck may still be drivable, ignoring the issue can lead to harder cold starts, reduced engine performance, and potential damage to other components.
How do you diagnose code P1339 on a 2014 GMC Sierra?
Diagnosis involves scanning the vehicle for stored codes, testing the glow plug in cylinder 2, checking the glow plug control module, and inspecting wiring and connections.
What is the most common fix for code P1339 on a 2014 GMC Sierra?
Replacing the faulty glow plug in cylinder 2 is the most common repair, though other components like the control module or wiring may also need attention.
How much does it cost to fix code P1339 on a 2014 GMC Sierra?
The cost to replace a glow plug typically ranges from $100 to $300, depending on labor rates and parts pricing.
Can a bad glow plug cause other issues in a 2014 GMC Sierra?
Yes, a bad glow plug can lead to poor fuel combustion, increased emissions, and in extreme cases, damage to the engine over time.
How do I prevent code P1339 from reoccurring on my 2014 GMC Sierra?
Regular maintenance, including inspecting and replacing glow plugs as needed, and addressing any wiring issues promptly can help prevent this code.
Is code P1339 specific to cylinder 2 on a 2014 GMC Sierra?
Yes, P1339 specifically refers to the glow plug in cylinder 2 exceeding its performance limits, although similar codes exist for other cylinders.
Discuss the causes and fixes for P1339 2014 GMC Sierra OBDII Code
Code P1339 2014 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
