P0672 2015 Chevrolet Silverado Code - Cylinder 2 Glow Plug Circuit Fault
Quick Answer
n the diesel engine, air alone is compressed in the cylinder. Common causes include Faulty cylinder #2 glow plug, Cylinder #2 glow plug harness is open or shorted, Cylinder #2 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
- P0672 2015 Chevrolet Silverado indicates Cylinder 2 Glow Plug Circuit Fault.
- Common causes
- Common causes include Faulty cylinder #2 glow plug, Cylinder #2 glow plug harness is open or shorted, Cylinder #2 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 P0672 2015 Chevrolet Silverado 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 P0672 2015 Chevrolet Silverado?
- Faulty cylinder #2 glow plug
- Cylinder #2 glow plug harness is open or shorted
- Cylinder #2 glow plug circuit poor electrical connection
- Faulty Glow Plug Control Module (GPCM)
How to Fix the DTC P0672 2015 Chevrolet Silverado?
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 P0672 2015 Chevrolet Silverado 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 P0672 2015 Chevrolet Silverado Code
1. What does the OBDII code P0672 mean on a 2015 Chevrolet Silverado?
P0672 indicates a Cylinder 2 Glow Plug Circuit Fault, meaning the engine control module (ECM) has detected an issue in the glow plug circuit for cylinder 2.
2. What are the common symptoms of the P0672 code in a Silverado?
Symptoms may include difficulty starting in cold weather, reduced engine performance, increased exhaust smoke, and an illuminated check engine light.
3. What causes the P0672 code on a 2015 Chevrolet Silverado?
Common causes include a faulty glow plug, damaged wiring or connectors in the glow plug circuit, a failed glow plug control module, or corrosion in the electrical connections.
4. How can I diagnose the P0672 code on my Silverado?
Start by inspecting the wiring and connectors for cylinder 2's glow plug. Use a multimeter to test the glow plug’s resistance and verify power and ground at the connector. Check the glow plug control module for proper operation.
5. Can I drive my Silverado with the P0672 code?
While it’s possible to drive with this code, prolonged operation without fixing the issue can lead to harder cold starts and potential damage to other components over time.
6. How do I fix the P0672 code on a 2015 Silverado?
Repairs may include replacing the defective glow plug, repairing or replacing damaged wiring or connectors, or replacing the glow plug control module if necessary.
7. What tools are needed to repair the P0672 code?
You may need a multimeter to test the glow plug circuit, basic hand tools to replace the glow plug, and an OBDII scanner to clear the code after repairs.
8. How much does it cost to fix the P0672 code on a Silverado?
The cost varies depending on the issue. A glow plug typically costs $20–$50, while labor costs for replacing it can range from $100–$200.
9. Can a faulty glow plug cause engine damage in my Silverado?
A faulty glow plug itself doesn’t usually cause engine damage, but if left unaddressed, it can lead to poor combustion, increased soot buildup, and stress on other components.
10. How do I prevent the P0672 code from recurring?
Regularly inspect and maintain the glow plug system, replace glow plugs as part of scheduled maintenance, and address wiring or connector issues promptly to prevent recurrence.
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