P0675 2018 Chevrolet Silverado Code - Cylinder 5 Glow Plug Circuit Fault
Quick Answer
n the diesel engine, air alone is compressed in the cylinder. Common causes include Faulty cylinder #5 glow plug, Cylinder #5 glow plug harness is open or shorted, Cylinder #5 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
- P0675 2018 Chevrolet Silverado indicates Cylinder 5 Glow Plug Circuit Fault.
- Common causes
- Common causes include Faulty cylinder #5 glow plug, Cylinder #5 glow plug harness is open or shorted, Cylinder #5 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 P0675 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 P0675 2018 Chevrolet Silverado?
- Faulty cylinder #5 glow plug
- Cylinder #5 glow plug harness is open or shorted
- Cylinder #5 glow plug circuit poor electrical connection
- Faulty Glow Plug Control Module (GPCM)
How to Fix the DTC P0675 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 P0675 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 P0675 2018 Chevrolet Silverado Code
1. What does the OBDII code P0675 mean on a 2018 Chevrolet Silverado?
P0675 indicates a fault in the glow plug circuit for cylinder 5, which can impact cold engine starting performance.
2. What are the common symptoms of P0675 on a 2018 Chevrolet Silverado?
Symptoms may include difficulty starting the engine in cold weather, rough idle, reduced fuel efficiency, or the check engine light turning on.
3. What causes the P0675 code to appear?
Common causes include a faulty glow plug in cylinder 5, damaged wiring or connectors in the glow plug circuit, or a malfunctioning glow plug control module.
4. Can I drive my 2018 Chevrolet Silverado with a P0675 code?
While the truck may still run, driving with this code can lead to starting issues in colder temperatures and should be addressed promptly to avoid further damage.
5. How do I diagnose the P0675 code on my Silverado?
Diagnose by using an OBDII scanner to confirm the code, inspecting the glow plug for cylinder 5, checking the wiring and connectors, and testing the glow plug control module.
6. How do I fix the P0675 code on a 2018 Chevrolet Silverado?
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 fix a P0675 code on a Silverado?
Replacing a glow plug typically costs $50–$150 for parts and labor, while more extensive repairs like wiring fixes or module replacement can cost $200–$500 or more.
8. Can a faulty glow plug cause long-term damage to my engine?
A faulty glow plug itself won’t typically cause long-term damage, but prolonged starting issues can strain the battery and starter or lead to incomplete combustion.
9. What tools do I need to diagnose and repair the P0675 code?
You’ll need an OBDII scanner, a multimeter to test electrical connections, and basic hand tools like a socket set to replace the glow plug.
10. Is P0675 specific to cylinder 5 on the 2018 Silverado?
Yes, the P0675 code specifically refers to a fault in the glow plug circuit for cylinder 5, while other similar codes (e.g., P0671–P0678) correspond to other cylinders.
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