P067D 2015 GMC Sierra Code - Cylinder 5 Glow Plug Control Circuit High 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
- P067D 2015 GMC Sierra indicates Cylinder 5 Glow Plug Control Circuit High 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 P067D 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.
What are the Possible Causes of the DTC P067D 2015 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 P067D 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 P067D 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.
Need more information about the P067D 2015 GMC Sierra code?
Need more information on how to fix the P067D 2015 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P067D 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P067D 2015 GMC Sierra Code
1. What does OBDII code P067D mean on a 2015 GMC Sierra?
P067D indicates a high voltage issue in the glow plug control circuit for cylinder 5, which is responsible for aiding cold starts in diesel engines.
2. What are the symptoms of code P067D on a 2015 GMC Sierra?
Symptoms may include difficulty starting in cold weather, a rough idle, reduced fuel efficiency, and the Check Engine Light turning on.
3. What causes code P067D to appear on a 2015 GMC Sierra?
Common causes include a faulty glow plug, damaged wiring or connectors in the glow plug circuit, a malfunctioning glow plug control module, or corrosion in the electrical connections.
4. How can I diagnose code P067D on my 2015 GMC Sierra?
Diagnose the issue by inspecting the glow plug for cylinder 5, checking the related wiring and connectors for damage or corrosion, and testing the glow plug control module's voltage output.
5. Can I drive my 2015 GMC Sierra with code P067D active?
While the truck may still run, driving with this code can lead to hard starts in cold weather and potential damage to the engine or electrical system if not addressed.
6. How do I fix code P067D on a 2015 GMC Sierra?
Repairs typically involve replacing the faulty glow plug, repairing or replacing damaged wiring or connectors, or replacing the glow plug control module if it’s defective.
7. How much does it cost to fix code P067D on a 2015 GMC Sierra?
Repair costs can vary but generally range from $100 to $300, depending on whether only the glow plug is replaced or additional components like the control module or wiring require repair.
8. Can a bad glow plug cause other issues on my 2015 GMC Sierra?
Yes, a bad glow plug can lead to poor engine performance, increased emissions, and difficulty starting the vehicle, especially in colder conditions.
9. How can I prevent code P067D from recurring on my 2015 GMC Sierra?
Regular maintenance, including inspecting the glow plugs, wiring, and connectors for wear or corrosion, can help prevent this code from recurring.
10. Will resetting the Check Engine Light fix code P067D on my 2015 GMC Sierra?
Resetting the light will not fix the underlying issue. The cause of the high voltage in the glow plug control circuit must be diagnosed and repaired to resolve the code fully.
Discuss the causes and fixes for P067D 2015 GMC Sierra OBDII Code
Code P067D 2015 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.
