P0673 2015 Chevrolet Silverado Code - Cylinder 3 Glow Plug Circuit Fault
Quick Answer
n the diesel engine, air alone is compressed in the cylinder. Common causes include Faulty cylinder #3 glow plug, Cylinder #3 glow plug harness is open or shorted, Cylinder #3 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
- P0673 2015 Chevrolet Silverado indicates Cylinder 3 Glow Plug Circuit Fault.
- Common causes
- Common causes include Faulty cylinder #3 glow plug, Cylinder #3 glow plug harness is open or shorted, Cylinder #3 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 P0673 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 P0673 2015 Chevrolet Silverado?
- Faulty cylinder #3 glow plug
- Cylinder #3 glow plug harness is open or shorted
- Cylinder #3 glow plug circuit poor electrical connection
- Faulty Glow Plug Control Module (GPCM)
How to Fix the DTC P0673 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 P0673 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 P0673 2015 Chevrolet Silverado Code
What does the OBDII code P0673 mean on a 2015 Chevrolet Silverado?
The P0673 code indicates a fault in the glow plug circuit for cylinder 3, which may prevent proper pre-heating of the cylinder in cold conditions.
What are the symptoms of the P0673 code on a 2015 Chevrolet Silverado?
Symptoms can include difficulty starting the engine in cold weather, reduced fuel efficiency, rough idling, and an illuminated check engine light.
What causes the P0673 code on a 2015 Chevrolet Silverado?
Common causes include a failed glow plug for cylinder 3, damaged wiring or connectors in the glow plug circuit, or a malfunctioning glow plug control module.
Can I drive my 2015 Chevrolet Silverado with a P0673 code?
Yes, you can drive the vehicle, but it may have difficulty starting in cold weather and could experience decreased performance. It’s best to address the issue promptly.
How can I troubleshoot the P0673 code on my 2015 Chevrolet Silverado?
Start by inspecting the glow plug and its wiring for damage. Use a multimeter to test the resistance of the glow plug, and check for proper voltage at the circuit.
What is the cost to repair the P0673 code on a 2015 Chevrolet Silverado?
The cost depends on the exact issue, but replacing a single glow plug typically costs between $50 and $150, while repairing wiring or replacing the control module could cost more.
How do I replace the cylinder 3 glow plug on a 2015 Chevrolet Silverado?
Disconnect the battery, locate cylinder 3, remove the old glow plug using a socket wrench, and install a new one. Be sure to torque it to the manufacturer’s specifications.
What happens if I ignore the P0673 code on my 2015 Chevrolet Silverado?
Ignoring the code can lead to poor engine performance, increased emissions, and potential damage to the glow plug control module or related components over time.
Can a faulty glow plug control module cause the P0673 code?
Yes, a malfunctioning glow plug control module can prevent proper operation of the cylinder 3 glow plug, triggering the P0673 code.
How can I prevent the P0673 code from recurring on my 2015 Chevrolet Silverado?
Regular maintenance, including inspecting glow plugs and their wiring, can help prevent this code. Use high-quality replacement parts and follow the manufacturer’s recommendations.
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