P0671 2015 Chevrolet Silverado Code - Cylinder 1 Glow Plug Circuit Fault
Quick Answer
n the diesel engine, air alone is compressed in the cylinder. Common causes include Faulty cylinder #1 glow plug, Cylinder #1 glow plug harness is open or shorted, Cylinder #1 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
- P0671 2015 Chevrolet Silverado indicates Cylinder 1 Glow Plug Circuit Fault.
- Common causes
- Common causes include Faulty cylinder #1 glow plug, Cylinder #1 glow plug harness is open or shorted, Cylinder #1 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 P0671 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 P0671 2015 Chevrolet Silverado?
- Faulty cylinder #1 glow plug
- Cylinder #1 glow plug harness is open or shorted
- Cylinder #1 glow plug circuit poor electrical connection
- Faulty Glow Plug Control Module (GPCM)
How to Fix the DTC P0671 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 P0671 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 P0671 2015 Chevrolet Silverado Code
1. What does the OBDII code P0671 mean on a 2015 Chevrolet Silverado?
P0671 indicates a "Cylinder 1 Glow Plug Circuit Fault," meaning there is an issue with the glow plug or its circuit for cylinder 1.
2. What are common symptoms of code P0671 in a 2015 Chevrolet Silverado?
Symptoms may include difficulty starting the engine in cold weather, rough idling, reduced fuel efficiency, or an illuminated check engine light.
3. What causes code P0671 in a 2015 Chevrolet Silverado?
Common causes include a failed glow plug, damaged glow plug wiring, a faulty glow plug control module, or poor electrical connections.
4. How do you diagnose code P0671 on a 2015 Chevrolet Silverado?
Diagnosis typically involves inspecting the glow plug for cylinder 1, checking the wiring and connectors for damage, and testing the glow plug control module.
5. Can you drive with code P0671 on a 2015 Chevrolet Silverado?
While the vehicle may still be drivable, starting in cold weather will be difficult, and ignoring the issue could lead to further engine problems.
6. How do you fix code P0671 on a 2015 Chevrolet Silverado?
Repairs may include replacing the faulty glow plug, repairing damaged wiring, or replacing the glow plug control module if it's defective.
7. How much does it cost to repair code P0671 on a 2015 Chevrolet Silverado?
The cost can range from $50 to $150 for a glow plug replacement, but wiring or module repairs may increase the cost significantly.
8. What tools are needed to repair code P0671 on a 2015 Chevrolet Silverado?
You may need a multimeter to test electrical connections, basic hand tools for removing and replacing the glow plug, and possibly a diagnostic scan tool.
9. Can a bad glow plug cause other issues in a 2015 Chevrolet Silverado?
Yes, a bad glow plug can lead to hard starting, increased emissions, and potentially strain other components of the engine starting system.
10. How can you prevent code P0671 from occurring in a 2015 Chevrolet Silverado?
Regular maintenance, including inspecting the glow plugs and wiring for wear, can help prevent this code from appearing.
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