P06C8 2015 GMC Sierra Code - Cylinder 4 Glow Plug Incorrect
Quick Answer
n the diesel engine, air alone is compressed in the cylinder. Common causes include Faulty cylinder #1 glow plug, Cylinder #1 glow plug harness is open or shorted, Cylinder #1 glow plug 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
- P06C8 2015 GMC Sierra indicates Cylinder 4 Glow Plug Incorrect.
- Common causes
- Common causes include Faulty cylinder #1 glow plug, Cylinder #1 glow plug harness is open or shorted, Cylinder #1 glow plug 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 P06C8 2015 GMC Sierra Description
Control of the glow plugs is accomplished by the glow plug control module. The nominal voltage for the glow plugs is 5.4 volts. When the ignition is turned On, the glow plug control module applies 7.2 V for 2.2 s, then 5.7 V for 0.8 s, and then 5.4 V until 1200°C (2192°F) is reached. The maximum voltage of the system is 10 V. While the engine is running the voltage will vary between 4.7 - 10 V when in closed loop control to maintain a glow plug temperature that ranges from 1150° - 1180°C (2102° - 2156°F). The temperature and the power consumption are controlled between the Engine Control Module (ECM) and the glow plug control module within a wide range to suit the engine's pre-heating requirements. Each glow plug is energized individually. This capability yields more optimum heat times for the glow plugs, thus pre - glow times can be kept to a minimum for a short wait to crank times and maximum glow plug durability. A Diagnostic Trouble Code (DTC) will be set if the Glow Plug resistance is not within a calibrated range.
What are the Possible Causes of the DTC P06C8 2015 GMC Sierra?
- Faulty cylinder #1 glow plug
- Cylinder #1 glow plug harness is open or shorted
- Cylinder #1 glow plug circuit poor electrical connection
- Faulty Glow Plug Control Module
How to Fix the DTC P06C8 2015 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P06C8 2015 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 P06C8 2015 GMC Sierra Code
1. What are the common symptoms of OBDII code P06C8 on a 2015 GMC Sierra related to Cylinder 4 Glow Plug Incorrect?
- Common symptoms include rough idle, decreased engine performance, and possible white smoke from the exhaust.
2. What are the possible causes of OBDII code P06C8 on a 2015 GMC Sierra indicating Cylinder 4 Glow Plug Incorrect?
- The code may be triggered by a faulty glow plug in cylinder 4, a damaged wiring harness, or a problem with the glow plug control module.
3. How can I diagnose the issue causing OBDII code P06C8 on my 2015 GMC Sierra for Cylinder 4 Glow Plug Incorrect?
- Using a diagnostic scanner to read the code and inspecting the glow plug, wiring, and control module can help pinpoint the problem.
4. Can I continue driving my 2015 GMC Sierra with OBDII code P06C8 related to Cylinder 4 Glow Plug Incorrect?
- It is not recommended to continue driving the vehicle with this code as it can lead to engine damage or poor performance.
5. How can I repair OBDII code P06C8 on a 2015 GMC Sierra indicating Cylinder 4 Glow Plug Incorrect?
- Repair typically involves replacing the faulty glow plug in cylinder 4, repairing or replacing any damaged wiring, or addressing issues with the control module.
6. Are there any preventive measures to avoid OBDII code P06C8 on a 2015 GMC Sierra for Cylinder 4 Glow Plug Incorrect?
- Regular maintenance, including checking and replacing glow plugs as needed, can help prevent issues that trigger this OBDII code.
7. Can a DIY enthusiast fix OBDII code P06C8 on a 2015 GMC Sierra related to Cylinder 4 Glow Plug Incorrect?
- While some DIY enthusiasts may have the skills to replace a glow plug, diagnosing and repairing electrical issues related to this code may require professional assistance.
8. Is it possible for other factors to trigger OBDII code P06C8 on a 2015 GMC Sierra besides Cylinder 4 Glow Plug Incorrect?
- While the code is typically associated with cylinder 4 glow plug issues, other factors like fuel system problems or engine timing issues can also trigger it.
9. How long does it usually take to repair OBDII code P06C8 on a 2015 GMC Sierra for Cylinder 4 Glow Plug Incorrect?
- The repair time can vary depending on the exact cause and complexity of the issue, but it typically takes a few hours to a day to resolve.
10. Can resetting the OBDII system clear the P06C8 code on a 2015 GMC Sierra without addressing the underlying issue?
- Resetting the system may temporarily clear the code, but if the underlying problem persists, the code is likely to reappear after driving the vehicle again.
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