P0672 2018 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 2018 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 2018 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 2018 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 2018 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 2018 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 2018 Chevrolet Silverado Code
1. What does the OBDII code P0672 mean on a 2018 Chevrolet Silverado?
P0672 indicates a fault in the cylinder 2 glow plug circuit, meaning the engine control module (ECM) has detected an issue with the glow plug or its wiring for cylinder 2.
2. What are the common symptoms of code P0672 in a 2018 Chevrolet Silverado?
Common symptoms include difficulty starting in cold weather, rough idling, reduced fuel efficiency, and an illuminated check engine light.
3. What causes the P0672 code on a 2018 Chevrolet Silverado?
Possible 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. Can I drive my 2018 Chevrolet Silverado with the P0672 code?
While the vehicle may still be drivable, it could experience starting problems in cold weather and reduced performance. It's best to address the issue as soon as possible to avoid further damage.
5. How do I diagnose the P0672 code on a 2018 Chevrolet Silverado?
Start by checking the glow plug for cylinder 2 using a multimeter, inspect the wiring and connectors for damage or corrosion, and test the glow plug control module for proper operation.
6. How do I fix the P0672 code on my 2018 Chevrolet Silverado?
Common fixes include replacing the faulty glow plug for cylinder 2, repairing or replacing damaged wiring or connectors, or replacing the glow plug control module if necessary.
7. How much does it cost to repair the P0672 code on a 2018 Chevrolet Silverado?
Replacing a single glow plug typically costs $100-$200, including parts and labor. If additional wiring repairs or control module replacements are needed, the cost could increase.
8. Can a bad glow plug cause engine damage on a 2018 Chevrolet Silverado?
While a bad glow plug itself won’t typically cause engine damage, prolonged issues with the glow plug circuit can lead to harder starts, increased emissions, and potential damage to other components.
9. How can I prevent the P0672 code from occurring again?
Regular maintenance, such as inspecting glow plugs and electrical connections during service intervals, and promptly addressing any starting issues, can help prevent this code.
10. Does the P0672 code only appear in cold weather?
While the symptoms of a faulty glow plug are more noticeable in cold weather, the code can appear at any time if the ECM detects an electrical fault in the cylinder 2 glow plug circuit.
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