P0671 2014 Chevrolet Silverado Code - Cylinder 1 Glow Plug Circuit Fault
Quick Answer
In 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 2014 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 2014 Chevrolet Silverado Description
Control of the glow plugs is accomplished by the Glow Plug Control Module. For the glow plugs, the nominal voltage is 5.4 volts. When the ignition is turned on, the Glow Plug Control Module applies 7.2 volts for 2.2 seconds, then 5.7 volts for 0.8 seconds, and then 5.4 volts until 1200°C (2192°F) is reached. The maximum voltage of the system is 10 volts.
While the engine is running, the voltage will vary between 4.7 and 10 volts when in closed-loop control to maintain a glow plug temperature that ranges from 1150° to 1180°C (2102° to 2156°F). The temperature and 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, resulting in a short wait for crank times and maximizing glow plug durability.
What are the Possible Causes of the DTC P0671 2014 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 2014 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 2014 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 2014 Chevrolet Silverado Code
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