P0671 2016 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 2016 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 2016 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 2016 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 2016 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 2016 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 2016 Chevrolet Silverado Code
1. What does the OBDII code P0671 mean for a 2016 Chevrolet Silverado?
P0671 indicates a fault in the glow plug circuit for cylinder 1, which may affect cold engine starting performance.
2. What are the symptoms of code P0671 in a 2016 Chevrolet Silverado?
Symptoms may include difficulty starting the engine in cold weather, rough idling, reduced fuel efficiency, and the check engine light being illuminated.
3. What causes the P0671 code on a 2016 Chevrolet Silverado?
Common causes include a faulty glow plug in cylinder 1, damaged glow plug wiring or connectors, a malfunctioning glow plug control module, or electrical issues such as corrosion or shorts in the circuit.
4. Can I drive my 2016 Chevrolet Silverado with code P0671?
While the truck may still be drivable, you could experience poor cold-start performance and reduced engine efficiency. It's best to address the issue promptly.
5. How do I diagnose the P0671 code on my Silverado?
Start by inspecting the glow plug for cylinder 1, checking for physical damage or corrosion. Use a multimeter to test the resistance of the glow plug and inspect wiring for shorts or damage.
6. How do I fix code P0671 on a 2016 Chevrolet Silverado?
Repair may involve replacing the glow plug for cylinder 1, repairing damaged wiring, cleaning corroded connectors, or replacing the glow plug control module if it’s faulty.
7. How much does it cost to repair the P0671 code on a Silverado?
Glow plug replacement typically costs $50 to $150 for parts and $100 to $250 for labor, depending on your location. Wiring repairs or module replacement may add to the cost.
8. Is the P0671 code specific to cold weather conditions?
Yes, the glow plug system is primarily used to assist in starting the engine during cold weather, so the issue may become more noticeable in colder climates.
9. How can I prevent a P0671 code from occurring in the future?
Regularly inspect and maintain the glow plug system, check for corroded or damaged wiring, and ensure the control module is functioning properly.
10. Will a faulty glow plug in cylinder 1 damage my engine?
While a faulty glow plug won’t directly damage the engine, prolonged issues can lead to harder starts, inefficient combustion, and increased wear on other components.
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