P066C 2016 Chevrolet Silverado Code - Cylinder 2 Glow Plug Control Circuit Low Voltage
Quick Answer
n the diesel engine, air alone is compressed in the cylinder. Common causes include Faulty cylinder #2 glow plug, Cylinder #2 glow plug harness is open or shorted, Cylinder #2 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
- P066C 2016 Chevrolet Silverado indicates Cylinder 2 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty cylinder #2 glow plug, Cylinder #2 glow plug harness is open or shorted, Cylinder #2 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 P066C 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 P066C 2016 Chevrolet Silverado?
- Faulty cylinder #2 glow plug
- Cylinder #2 glow plug harness is open or shorted
- Cylinder #2 glow plug circuit poor electrical connection
- Faulty Glow Plug Control Module
How to Fix the DTC P066C 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 P066C 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.
Need more information about the P066C 2016 Chevrolet Silverado code?
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Frequently Asked Questions about P066C 2016 Chevrolet Silverado Code
What does the OBDII code P066C mean for a 2016 Chevrolet Silverado?
P066C indicates a low voltage issue in the glow plug control circuit for cylinder 2, which assists in starting the engine in cold conditions.
What are the symptoms of code P066C on a 2016 Chevrolet Silverado?
Common symptoms include difficulty starting the engine in cold weather, a check engine light, and reduced engine performance.
What causes the P066C code on a 2016 Chevrolet Silverado?
Potential causes include a faulty glow plug, damaged wiring or connectors in the glow plug circuit, a malfunctioning glow plug control module, or low battery voltage.
Can driving with code P066C damage my 2016 Chevrolet Silverado?
Driving with this code may cause cold starting issues and could lead to further damage if the glow plug system is neglected over time.
How do I diagnose the P066C code on a 2016 Chevrolet Silverado?
Start by inspecting the glow plug for cylinder 2, checking the wiring and connectors for damage, testing the glow plug control module, and verifying battery voltage.
How is the P066C code typically fixed on a 2016 Chevrolet Silverado?
Repairs may include replacing the glow plug for cylinder 2, repairing or replacing damaged wiring, or replacing the glow plug control module.
Is replacing the glow plug for cylinder 2 a DIY task for the P066C code?
If you have basic mechanical skills and tools, replacing the glow plug may be a DIY task, but diagnosing wiring or module issues may require professional assistance.
Can a weak battery trigger the P066C code on a 2016 Chevrolet Silverado?
Yes, low battery voltage can cause the glow plug circuit to receive insufficient power, leading to this code.
How do I reset the P066C code after repairs on my 2016 Chevrolet Silverado?
After repairs, use an OBDII scanner to clear the code. Ensure the issue is resolved to prevent the code from returning.
What tools do I need to address the P066C code on a 2016 Chevrolet Silverado?
You may need a multimeter for testing voltage, an OBDII scanner for diagnostics, and basic hand tools for replacing the glow plug or repairing wiring.
Discuss the causes and fixes for P066C 2016 Chevrolet Silverado OBDII Code
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