P0674 2017 Chevrolet Silverado Code - Cylinder 4 Glow Plug Circuit Fault
Quick Answer
The P0674 diagnostic trouble code (DTC) specifically indicates a fault in the Glow Plug Circuit for Cylinder 4 in a 2017 Chevrolet Silverado. Common causes include Faulty glow plug in cylinder 4, Damaged glow plug relay, Wiring issues or electrical shorts. 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
- P0674 2017 Chevrolet Silverado indicates Cylinder 4 Glow Plug Circuit Fault.
- Common causes
- Common causes include Faulty glow plug in cylinder 4, Damaged glow plug relay, Wiring issues or electrical shorts.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0674 2017 Chevrolet Silverado Description
The P0674 diagnostic trouble code (DTC) specifically indicates a fault in the Glow Plug Circuit for Cylinder 4 in a 2017 Chevrolet Silverado. Glow plugs are essential components in diesel engines, as they help warm up the combustion chamber to facilitate cold starts. When the engine is cold, the glow plug heats up and ignites the air-fuel mixture, aiding in the combustion process. In this case, a fault in the glow plug circuit for cylinder 4 means that there is an issue with the electrical system responsible for activating the glow plug in that particular cylinder.
Common Causes of P0674 2017 Chevrolet Silverado
- Faulty glow plug in cylinder 4
- Damaged glow plug relay
- Wiring issues or electrical shorts
- Malfunctioning PCM
- Corrosion or poor connection in the glow plug circuit
Symptoms of P0674 2017 Chevrolet Silverado
- Extended crank times when starting the engine
- Rough idling or misfiring
- Decreased fuel efficiency
- Illumination of the check engine light
- Engine hesitation or lack of power
How to Fix P0674 2017 Chevrolet Silverado
- Begin by conducting a thorough inspection of the glow plug in cylinder 4 to determine if it is faulty. If necessary, replace the glow plug.
- Check the glow plug relay for any signs of damage or malfunction. Replace if needed.
- Inspect the wiring in the glow plug circuit for any issues such as corrosion or shorts. Repair or replace the wiring as required.
- Use a diagnostic tool to scan the PCM for any fault codes and ensure that it is functioning correctly. Reset any codes and retest the system.
- Clear the DTC P0674 code from the vehicle's computer system and test the vehicle to confirm that the issue has been resolved.
Cost to Fix P0674 2017 Chevrolet Silverado
The typical repair costs for addressing a P0674 code in a 2017 Chevrolet Silverado can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the cost of replacing a glow plug can range from $50 to $150 per plug, while replacing a glow plug relay may cost around $100 to $200. Labor costs can add to the total expenses, with rates typically ranging between $80 and $150 per hour at most auto repair shops. It is recommended to consult with a mechanic or dealership to get a more precise estimate based on the specific circumstances of the vehicle.
Need more information about the P0674 2017 Chevrolet Silverado code?
Need more information on how to fix the P0674 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0674 2017 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0674 2017 Chevrolet Silverado Code
1. What does the OBDII code P0674 mean on a 2017 Chevrolet Silverado?
P0674 indicates a fault in the glow plug circuit for cylinder 4, meaning the system has detected an issue with the operation or performance of the glow plug in that specific cylinder.
2. What are the symptoms of a P0674 code in a 2017 Chevrolet Silverado?
Common symptoms include difficulty starting the engine in cold weather, rough idling, reduced fuel efficiency, and an illuminated Check Engine Light.
3. What causes the P0674 code in a Chevrolet Silverado?
The code can be caused by a faulty glow plug, damaged glow plug wiring or connectors, a failed glow plug control module, or corrosion in the circuit.
4. Can I drive my 2017 Chevrolet Silverado with a P0674 code?
While you can drive with this code, it is not recommended, especially in cold weather, as the engine may struggle to start and run efficiently.
5. How do I diagnose the P0674 code?
Diagnose by using a multimeter to test the resistance of the cylinder 4 glow plug, inspecting the wiring and connectors for damage or corrosion, and testing the glow plug control module for proper operation.
6. How do I fix the P0674 code on a 2017 Chevrolet Silverado?
Repairs may include replacing the faulty cylinder 4 glow plug, repairing or replacing damaged wiring or connectors, or replacing the glow plug control module if it is defective.
7. How much does it cost to repair a P0674 code?
The cost varies, but replacing a single glow plug typically costs $50–$150, while more extensive repairs like wiring or control module replacement may cost $200–$500 or more.
8. Can a P0674 code cause long-term damage to my Silverado?
If left unresolved, it can lead to harder starts, increased emissions, and potential damage to the engine or other components due to improper combustion.
9. What tools are needed to fix a P0674 code?
You'll need an OBDII scanner to confirm the code, a multimeter to test electrical components, and basic hand tools to replace the glow plug or repair wiring.
10. How can I prevent the P0674 code from occurring again?
Regular maintenance, including inspecting and cleaning glow plug connections and replacing glow plugs at recommended intervals, can help prevent this issue.
Discuss the causes and fixes for P0674 2017 Chevrolet Silverado OBDII Code
Code P0674 2017 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.