P067C 2016 GMC Sierra Code - Cylinder 5 Glow Plug Control Circuit Low Voltage
Quick Answer
n the diesel engine, air alone is compressed in the cylinder. Common causes include Faulty cylinder #5 glow plug, Cylinder #5 glow plug harness is open or shorted, Cylinder #5 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
- P067C 2016 GMC Sierra indicates Cylinder 5 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty cylinder #5 glow plug, Cylinder #5 glow plug harness is open or shorted, Cylinder #5 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 P067C 2016 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.
What are the Possible Causes of the DTC P067C 2016 GMC Sierra?
- Faulty cylinder #5 glow plug
- Cylinder #5 glow plug harness is open or shorted
- Cylinder #5 glow plug circuit poor electrical connection
- Faulty Glow Plug Control Module
How to Fix the DTC P067C 2016 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 P067C 2016 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 P067C 2016 GMC Sierra code?
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Frequently Asked Questions about P067C 2016 GMC Sierra Code
1. What are the common symptoms of OBDII code P067C in a 2016 GMC Sierra?
The common symptoms include hard starting, rough idling, reduced engine performance, and the illumination of the check engine light.
2. What does the OBDII code P067C indicate in a 2016 GMC Sierra?
Code P067C indicates a low voltage condition in the control circuit of the glow plug for cylinder 5 in a 2016 GMC Sierra.
3. What are the possible causes of the Cylinder 5 Glow Plug Control Circuit Low Voltage code in a 2016 GMC Sierra?
Possible causes include a faulty glow plug, damaged wiring or connectors, a defective glow plug control module, or issues with the vehicle's electrical system.
4. How can I diagnose the Cylinder 5 Glow Plug Control Circuit Low Voltage issue in my 2016 GMC Sierra?
Diagnosing the issue involves checking the glow plug for cylinder 5, inspecting the wiring and connectors for damage, testing the glow plug control module, and verifying the vehicle's electrical system.
5. Can a DIY enthusiast repair the Cylinder 5 Glow Plug Control Circuit Low Voltage issue in a 2016 GMC Sierra?
While some basic troubleshooting and inspections can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for proper diagnosis and repair of this code.
6. What are the implications of ignoring the P067C code in a 2016 GMC Sierra?
Ignoring the code can lead to potential starting difficulties, rough running engine, decreased fuel efficiency, and possible damage to the engine over time.
7. How much does it typically cost to repair the Cylinder 5 Glow Plug Control Circuit Low Voltage issue in a 2016 GMC Sierra?
The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing the glow plug, repairing wiring, or addressing issues with the control module, with costs ranging from $100 to $500 or more.
8. Can the Cylinder 5 Glow Plug Control Circuit Low Voltage code be intermittent in a 2016 GMC Sierra?
Yes, the code can sometimes be intermittent, especially if the issue is related to loose connections or wiring problems that only occur under certain conditions.
9. Are there any preventive measures to avoid the Cylinder 5 Glow Plug Control Circuit Low Voltage code in a 2016 GMC Sierra?
Regular maintenance, such as checking the glow plugs during scheduled service intervals, inspecting wiring for damage, and keeping the electrical system in good condition, can help prevent this code from occurring.
10. Is it safe to continue driving a 2016 GMC Sierra with the Cylinder 5 Glow Plug Control Circuit Low Voltage code?
It is generally not recommended to drive the vehicle with this code active, as it can lead to performance issues and potential damage to the engine. It is best to have the issue diagnosed and repaired as soon as possible.
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