P066D 2015 Chevrolet Silverado Code - Cylinder 2 Glow Plug Control Circuit High 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
- P066D 2015 Chevrolet Silverado indicates Cylinder 2 Glow Plug Control Circuit High 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 P066D 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 P066D 2015 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 P066D 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 P066D 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 P066D 2015 Chevrolet Silverado Code
What does the OBDII code P066D mean for a 2015 Chevrolet Silverado?
P066D indicates a high voltage issue in the cylinder 2 glow plug control circuit, which is part of the diesel engine's glow plug system.
What are the common symptoms of the P066D code on a 2015 Chevrolet Silverado?
Symptoms may include difficulty starting the engine in cold weather, reduced engine performance, and the check engine light turning on.
What causes the P066D code to appear in a 2015 Chevrolet Silverado?
The code can be triggered by a faulty glow plug, damaged wiring or connectors in the glow plug control circuit, or a malfunctioning glow plug control module.
Can I still drive my 2015 Chevrolet Silverado with the P066D code active?
While the truck may still run, driving with this code can lead to starting issues and may worsen engine performance, especially in colder temperatures.
How do you fix the P066D code on a 2015 Chevrolet Silverado?
Repairs typically involve inspecting and replacing the cylinder 2 glow plug, repairing damaged wiring, or replacing the glow plug control module if necessary.
How can I test the glow plug for cylinder 2 in my 2015 Chevrolet Silverado?
You can use a multimeter to check the resistance of the glow plug; a faulty glow plug will usually show no continuity or an abnormally high resistance.
Is the P066D code specific to cylinder 2?
Yes, it specifically points to a high voltage issue in the glow plug control circuit for cylinder 2.
What tools are needed to diagnose the P066D code on a 2015 Chevrolet Silverado?
Common tools include an OBDII scanner, a multimeter for electrical testing, and basic hand tools for inspecting and replacing components.
How much does it cost to repair the P066D code on a 2015 Chevrolet Silverado?
Repair costs can vary but may range from $50 to $300, depending on whether the glow plug, wiring, or control module needs replacement.
Can a P066D code cause long-term damage to my 2015 Chevrolet Silverado?
Ignoring the code can lead to prolonged starting issues and potential wear on the engine, especially in cold climates where glow plugs are critical for ignition.
Discuss the causes and fixes for P066D 2015 Chevrolet Silverado OBDII Code
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