P067A 2017 GMC Sierra Code - Cylinder 4 Glow Plug Control Circuit Low Voltage
Quick Answer
n the diesel engine, air alone is compressed in the cylinder. Common causes include Faulty cylinder #4 glow plug, Cylinder #4 glow plug harness is open or shorted, Cylinder #4 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
- P067A 2017 GMC Sierra indicates Cylinder 4 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty cylinder #4 glow plug, Cylinder #4 glow plug harness is open or shorted, Cylinder #4 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 P067A 2017 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 P067A 2017 GMC Sierra?
- Faulty cylinder #4 glow plug
- Cylinder #4 glow plug harness is open or shorted
- Cylinder #4 glow plug circuit poor electrical connection
- Faulty Glow Plug Control Module
How to Fix the DTC P067A 2017 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 P067A 2017 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 P067A 2017 GMC Sierra Code
What does the OBDII code P067A mean on a 2017 GMC Sierra?
1. P067A indicates a low voltage issue in the glow plug control circuit for cylinder 4, which helps with cold engine starting in diesel engines. 2.
What are the symptoms of code P067A on a 2017 GMC Sierra?
Symptoms may include difficulty starting the engine in cold weather, an illuminated check engine light, and potentially reduced fuel efficiency. 3.
What causes the P067A code to appear on a 2017 GMC Sierra?
Common causes include a faulty glow plug, damaged wiring or connectors in the glow plug circuit, or a malfunctioning glow plug control module. 4.
Can I still drive my 2017 GMC Sierra with the P067A code?
Yes, but it’s not recommended to ignore the issue, especially in cold climates, as it could make starting the engine difficult and potentially lead to further damage. 5.
How do I diagnose the P067A code on a 2017 GMC Sierra?
Start by inspecting the glow plug and its wiring for damage or corrosion. Use a multimeter to check voltage and resistance in the circuit, and test the glow plug control module if necessary. 6.
How much does it cost to fix the P067A code on a 2017 GMC Sierra?
The cost depends on the root cause. Replacing a glow plug typically costs $50–$150, while repairing wiring or replacing the glow plug control module can vary. 7.
Can a bad battery cause the P067A code on a 2017 GMC Sierra?
Yes, a weak or failing battery can cause low voltage issues in the glow plug circuit, leading to the P067A code. 8.
How do I reset the P067A code on a 2017 GMC Sierra?
After repairing the issue, the code can be cleared using an OBDII scanner. If the problem persists, the code will return. 9.
Is the P067A code specific to cylinder 4 on a 2017 GMC Sierra?
Yes, the P067A code is specific to the glow plug control circuit for cylinder 4. 10.
What happens if I ignore the P067A code on a 2017 GMC Sierra?
Ignoring the code can lead to poor cold starts, increased emissions, and potential damage to the glow plug system over time.
Discuss the causes and fixes for P067A 2017 GMC Sierra OBDII Code
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