P067D GMC 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 GMC 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 GMC 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 GMC?
- 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 GMC?
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 GMC 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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Information for Specific GMC Models
- P067D 2014 GMC Sierra — Cylinder 5 Glow Plug Control Circuit High Voltage
- P067D 2015 GMC Sierra — Cylinder 5 Glow Plug Control Circuit High Voltage
- P067D 2016 GMC Sierra — Cylinder 5 Glow Plug Control Circuit High Voltage
- P067D 2017 GMC Sierra — Cylinder 5 Glow Plug Control Circuit High Voltage
- P067D 2018 GMC Sierra — Cylinder 5 Glow Plug Control Circuit High Voltage
Frequently Asked Questions about P067D GMC Code
What are the common symptoms of OBDII code P067D GMC?
Symptoms may include hard starting, rough idling, decreased fuel efficiency, and the illumination of the Check Engine Light.
What are the possible causes of OBDII code P067D GMC?
Potential causes include a faulty glow plug, issues with the glow plug control module, wiring problems, or a defective PCM.
How can I diagnose OBDII code P067D GMC?
Diagnosis involves inspecting the glow plug, checking the wiring for any damage, testing the glow plug control module, and using a scan tool to monitor the system.
What are some tips for repairing OBDII code P067D GMC?
Repair may involve replacing the faulty glow plug, repairing damaged wiring, replacing the glow plug control module, or reprogramming the PCM.
Can I continue driving with OBDII code P067D GMC?
It is not recommended to drive with this code present, as it can lead to further engine damage and potential safety hazards.
How serious is OBDII code P067D GMC?
While the severity may vary, it is important to address this code promptly to prevent potential engine problems and ensure proper vehicle operation.
Is it safe to clear OBDII code P067D GMC and see if it returns?
Clearing the code may temporarily turn off the Check Engine Light, but if the underlying issue is not resolved, the code is likely to return.
Can weather conditions affect OBDII code P067D GMC?
Extreme cold temperatures can impact the performance of glow plugs, potentially triggering this code in cold weather regions.
How can I prevent OBDII code P067D GMC from occurring?
Regular maintenance, such as checking and replacing glow plugs as recommended, can help prevent this code from appearing.
Discuss the causes and fixes for P067D GMC OBDII Code
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