P066E 2014 Chevrolet Silverado Code - Cylinder 3 Glow Plug Control Circuit Low Voltage
Quick Answer
n the diesel engine, air alone is compressed in the cylinder. Common causes include Faulty cylinder #3 glow plug, Cylinder #3 glow plug harness is open or shorted, Cylinder #3 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
- P066E 2014 Chevrolet Silverado indicates Cylinder 3 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty cylinder #3 glow plug, Cylinder #3 glow plug harness is open or shorted, Cylinder #3 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 P066E 2014 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 P066E 2014 Chevrolet Silverado?
- Faulty cylinder #3 glow plug
- Cylinder #3 glow plug harness is open or shorted
- Cylinder #3 glow plug circuit poor electrical connection
- Faulty Glow Plug Control Module
How to Fix the DTC P066E 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 P066E 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 P066E 2014 Chevrolet Silverado Code
What does the OBDII code P066E mean on a 2014 Chevrolet Silverado?
P066E indicates a low voltage issue in the cylinder 3 glow plug control circuit, which can affect the glow plug's ability to heat properly during cold starts.
What are the symptoms of code P066E in a 2014 Chevrolet Silverado?
Common symptoms include difficulty starting the engine in cold weather, poor fuel combustion, increased exhaust smoke, and potentially reduced engine performance.
What causes the P066E code on a 2014 Chevrolet Silverado?
Possible causes include a faulty glow plug, damaged wiring or connections in the cylinder 3 glow plug circuit, a malfunctioning glow plug control module, or corrosion in electrical components.
How can I diagnose the P066E code in my 2014 Chevrolet Silverado?
Start by inspecting the cylinder 3 glow plug and its wiring for damage or corrosion. Use a multimeter to test for proper voltage and continuity in the circuit. Check the glow plug control module for faults.
Can a faulty glow plug cause the P066E code?
Yes, a malfunctioning glow plug can cause a low voltage issue, triggering the P066E code.
Is it safe to drive with the P066E code on a 2014 Chevrolet Silverado?
While the vehicle may still run, driving with this code can lead to difficulty starting in cold weather, reduced fuel efficiency, and increased emissions. It’s best to address the issue promptly.
How do I fix the P066E code on my 2014 Chevrolet Silverado?
Repairs may involve replacing the cylinder 3 glow plug, repairing or replacing damaged wiring, cleaning corroded connectors, or replacing the glow plug control module if necessary.
What tools do I need to repair the P066E code?
You’ll need basic tools like a socket set, multimeter, and possibly a scan tool to test the glow plug circuit and reset the code after repairs.
Can a bad glow plug control module cause the P066E code?
Yes, if the control module fails to supply adequate voltage to the cylinder 3 glow plug, it can trigger the P066E code.
How much does it cost to fix the P066E code on a 2014 Chevrolet Silverado?
Repair costs can vary depending on the cause. Replacing a single glow plug may cost $50-$150, while replacing a glow plug control module could cost $300-$500, excluding labor.
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