P0673 2017 GMC Sierra Code - Cylinder 3 Glow Plug Circuit Fault
Quick Answer
The diagnostic trouble code P0673 for a 2017 GMC Sierra indicates a fault in the glow plug circuit for cylinder 3. Common causes include Failed glow plug in cylinder 3, Faulty wiring or connection to the glow plug, Malfunctioning glow plug control module. 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 2017 GMC Sierra indicates Cylinder 3 Glow Plug Circuit Fault.
- Common causes
- Common causes include Failed glow plug in cylinder 3, Faulty wiring or connection to the glow plug, Malfunctioning glow plug control module.
- 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.
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Code P0673 2017 GMC Sierra Description
The diagnostic trouble code P0673 for a 2017 GMC Sierra indicates a fault in the glow plug circuit for cylinder 3. Glow plugs are essential components in diesel engines to aid in cold starting by heating the air in the combustion chamber. When a glow plug circuit fault occurs, it can lead to difficulties in starting the vehicle, reduced engine performance, increased emissions, and potential damage to the engine over time.
Common Causes of P0673 2017 GMC Sierra
- Failed glow plug in cylinder 3
- Faulty wiring or connection to the glow plug
- Malfunctioning glow plug control module
- Corrosion or damage to the glow plug circuit components
- Electrical issues in the vehicle's system affecting the glow plug circuit
Symptoms of P0673 2017 GMC Sierra
- Difficulty starting the vehicle, especially in cold weather
- Rough idling or misfires
- Decreased engine performance and fuel efficiency
- Illumination of the check engine light
- Increased emissions
How to Fix P0673 2017 GMC Sierra
- Begin by diagnosing the specific cause of the cylinder 3 glow plug circuit fault using a diagnostic scan tool to pinpoint the exact issue.
- Inspect the glow plug in cylinder 3 for any signs of damage or wear, and replace it if necessary.
- Check the wiring and connections to the glow plug for any corrosion, breaks, or loose connections, repairing or replacing them as needed.
- Test the glow plug control module to ensure it is functioning correctly, replacing it if it is faulty.
- Clear the diagnostic trouble codes from the vehicle's system and test the vehicle to ensure the issue has been resolved.
Cost to Fix P0673 2017 GMC Sierra
The typical repair costs for a cylinder 3 glow plug circuit fault can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, replacing a glow plug can cost between $50 and $150 per plug, while addressing wiring or control module issues may increase the total cost. Labor rates at auto repair shops can range from $80 to $150 per hour, with additional charges for diagnostic time and any necessary parts. It is recommended to consult with a qualified mechanic or dealership for a more accurate estimate based on the individual circumstances of the vehicle.
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Frequently Asked Questions about P0673 2017 GMC Sierra Code
1. What does the OBDII code P0673 mean on a 2017 GMC Sierra?
P0673 indicates a fault in the glow plug circuit for cylinder 3, which helps in cold starting the engine by heating the air in the combustion chamber.
2. What are the common symptoms of code P0673 on a 2017 GMC Sierra?
Symptoms include difficulty starting in cold weather, rough idling, reduced engine performance, and the illumination of the check engine light.
3. What causes the P0673 code in a 2017 GMC Sierra?
Common causes include a faulty glow plug for cylinder 3, 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 a P0673 code?
Yes, but driving with this code can cause poor cold starts and may lead to further engine issues if not addressed promptly.
5. How can I diagnose a P0673 code on my 2017 GMC Sierra?
Start by inspecting the glow plug, wiring, and connectors for cylinder 3. Use a multimeter to check for continuity in the glow plug and test the circuit for proper voltage.
6. How do I fix the P0673 code on a 2017 GMC Sierra?
Repairs may include replacing the faulty glow plug, repairing damaged wiring or connectors, or replacing the glow plug control module if it’s malfunctioning.
7. How much does it cost to repair the P0673 code on a 2017 GMC Sierra?
Repair costs can range from $100 to $300, depending on whether you need to replace a glow plug, repair wiring, or replace the glow plug control module.
8. Can a bad glow plug cause long-term damage to my 2017 GMC Sierra?
If left unaddressed, a bad glow plug can lead to poor engine performance, increased emissions, and difficulty starting, especially in cold weather.
9. How can I prevent the P0673 code from recurring on my 2017 GMC Sierra?
Regularly inspect the glow plugs, wiring, and connectors for damage, and replace the glow plugs at recommended intervals to ensure proper operation.
10. Does the P0673 code affect fuel economy on a 2017 GMC Sierra?
Yes, a faulty glow plug can lead to incomplete combustion, which may slightly reduce fuel efficiency and increase emissions.
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