P1339 GMC Code - Cylinder 2 Glow Plug Offset Exceeded Learning Limit
Quick Answer
The P1339 GMC code indicates that the cylinder 2 glow plug offset has exceeded the learning limit. Common causes include Faulty glow plug in cylinder 2, Wiring or connector issues related to the glow plug, Issues with the glow plug control module. 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 GMC indicates Cylinder 2 Glow Plug Offset Exceeded Learning Limit.
- Common causes
- Common causes include Faulty glow plug in cylinder 2, Wiring or connector issues related to the glow plug, Issues with the glow plug control module.
- 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 P1339 GMC Description
The P1339 GMC code indicates that the cylinder 2 glow plug offset has exceeded the learning limit. Glow plugs are essential components in diesel engines, aiding in cold starts by heating the combustion chamber. When the offset of the glow plug in cylinder 2 exceeds the learning limit, it means that the glow plug is not performing within the expected parameters. This can lead to difficulties starting the engine, reduced fuel efficiency, and potential engine misfires. If left unaddressed, this issue can cause further damage to the engine and exhaust system.
Common Causes of P1339 GMC
- Faulty glow plug in cylinder 2.
- Wiring or connector issues related to the glow plug.
- Issues with the glow plug control module.
- Engine control module (ECM) malfunction.
- Poor quality fuel or contaminated fuel affecting combustion.
Symptoms of P1339 GMC
- Difficulty starting the engine, especially in cold weather.
- Reduced fuel efficiency.
- Engine misfires or rough idling.
- Illumination of the check engine light.
- Increased exhaust emissions.
How to Fix P1339 GMC
- Diagnose the specific issue by using a scan tool to pinpoint the faulty glow plug in cylinder 2.
- Inspect the wiring and connectors to ensure they are securely connected and free from damage.
- Replace the faulty glow plug in cylinder 2 with a new one.
- Reset the engine control module (ECM) to clear the error code and relearn the glow plug offset.
- Test the vehicle to ensure the issue has been resolved and that the glow plug is functioning properly.
Cost to Fix P1339 GMC
The cost of repairing a cylinder 2 glow plug offset issue can vary depending on the specific cause of the problem and the make and model of the vehicle. On average, the parts for a glow plug replacement can range from $50 to $150, while labor costs can range from $100 to $250. Overall, the total repair cost for this issue may fall between $150 and $400. It's important to note that these are rough estimates and actual costs may differ based on the factors mentioned earlier.
Tech Notes for P1339 GMC
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Information for Specific GMC Models
- P1339 2014 GMC Sierra — Cylinder 2 Glow Plug Offset Exceeded Learning Limit
- P1339 2015 GMC Sierra — Cylinder 2 Glow Plug Offset Exceeded Learning Limit
- P1339 2016 GMC Sierra — Cylinder 2 Glow Plug Offset Exceeded Learning Limit
- P1339 2017 GMC Sierra — Cylinder 2 Glow Plug Offset Exceeded Learning Limit
- P1339 2018 GMC Sierra — Cylinder 2 Glow Plug Offset Exceeded Learning Limit
Frequently Asked Questions about P1339 GMC Code
1. What are the common symptoms of OBDII code P1339 GMC?
- Common symptoms include rough idle, decreased engine performance, and an illuminated check engine light.
2. What does the OBDII code P1339 GMC Cylinder 2 Glow Plug Offset Exceeded Learning Limit mean?
- This code indicates that the engine control module has detected an issue with the glow plug system in cylinder 2, specifically related to the offset learning limit.
3. What are the possible causes of OBDII code P1339 GMC?
- Possible causes include faulty glow plug in cylinder 2, wiring issues in the glow plug circuit, a malfunctioning engine control module, or software-related issues.
4. How can I diagnose OBDII code P1339 GMC?
- Diagnosis typically involves using a scan tool to retrieve the code, inspecting the glow plug in cylinder 2, checking the wiring for any damage, and testing the engine control module.
5. Can I still drive my vehicle with OBDII code P1339 GMC?
- It is not recommended to drive your vehicle with this code present, as it can lead to further engine damage or performance issues.
6. How can I repair OBDII code P1339 GMC?
- Repair may involve replacing the glow plug in cylinder 2, repairing any damaged wiring, resetting the engine control module, or updating software as needed.
7. Is OBDII code P1339 GMC a common issue in GMC vehicles?
- While not extremely common, this code can occur in GMC vehicles with glow plug systems, particularly in diesel engines.
8. Can I reset OBDII code P1339 GMC without fixing the underlying issue?
- While you can clear the code temporarily, it is important to address the underlying problem to prevent further issues and potential damage to your vehicle.
9. How much does it cost to repair OBDII code P1339 GMC at a repair shop?
- Repair costs can vary depending on the exact cause of the issue, but expect to pay for parts and labor, which may range from $100 to $500 or more.
10. Are there any preventive measures to avoid OBDII code P1339 GMC in the future?
- Regular maintenance of the glow plug system, including inspection and replacement as needed, can help prevent this code from occurring in the future.
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