P066F 2014 Chevrolet Silverado Code - Cylinder 3 Glow Plug Control Circuit High Voltage
Quick Answer
The diagnostic trouble code P066F for a 2014 Chevrolet Silverado indicates an issue with the Cylinder 3 Glow Plug Control Circuit High Voltage. Common causes include Faulty glow plug in cylinder 3, Malfunctioning glow plug control module, Damaged wiring or connectors in the control circuit. 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
- P066F 2014 Chevrolet Silverado indicates Cylinder 3 Glow Plug Control Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug in cylinder 3, Malfunctioning glow plug control module, Damaged wiring or connectors in the control circuit.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P066F 2014 Chevrolet Silverado Description
The diagnostic trouble code P066F for a 2014 Chevrolet Silverado indicates an issue with the Cylinder 3 Glow Plug Control Circuit High Voltage. Glow plugs are essential components in diesel engines, as they heat up the combustion chamber to facilitate cold starts. The glow plug control module regulates the power supply to the glow plugs based on the engine's temperature and other factors. When the control circuit for the glow plug in cylinder 3 registers a high voltage, it suggests a malfunction in the system.
Common Causes of P066F 2014 Chevrolet Silverado
- Faulty glow plug in cylinder 3
- Malfunctioning glow plug control module
- Damaged wiring or connectors in the control circuit
- Issues with engine temperature sensors
- Corrosion or poor connections in the system
Symptoms of P066F 2014 Chevrolet Silverado
- Difficulty starting the engine, especially in cold weather
- Rough idling or misfires
- Decreased fuel efficiency
- Increased emissions
- Check Engine Light illuminated on the dashboard
How to Fix P066F 2014 Chevrolet Silverado
- Begin by diagnosing the specific cause of the high voltage in the cylinder 3 glow plug control circuit using a diagnostic scanner.
- Inspect the glow plug in cylinder 3 for proper operation and replace it if necessary.
- Check the glow plug control module for any faults and replace it if needed.
- Inspect the wiring and connectors in the control circuit for damage or corrosion, repairing or replacing them as required.
- Test the system after repairs to ensure the issue has been resolved and clear the diagnostic trouble code.
Cost to Fix P066F 2014 Chevrolet Silverado
The typical repair costs for addressing a Cylinder 3 Glow Plug Control Circuit High Voltage issue in a 2014 Chevrolet Silverado can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships and lower at independent shops. For a more precise estimate, it's advisable to check local rates before proceeding with the repair.
Need more information about the P066F 2014 Chevrolet Silverado code?
Need more information on how to fix the P066F 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P066F 2014 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P066F 2014 Chevrolet Silverado Code
What does the OBDII code P066F mean on a 2014 Chevrolet Silverado?
P066F indicates a high voltage issue in the glow plug control circuit for cylinder 3, which is part of the diesel engine's pre-heating system.
What are the symptoms of code P066F in a 2014 Chevy Silverado?
Common symptoms include difficulty starting the engine in cold weather, reduced engine performance, and the illumination of the check engine light.
What causes the P066F code to appear?
Possible causes include a faulty glow plug, damaged wiring or connectors in the glow plug circuit, a malfunctioning glow plug control module, or high resistance in the circuit.
Can I drive my 2014 Silverado with the P066F code?
While you may still be able to drive, prolonged operation with this code can lead to starting issues, especially in cold weather, and potential damage to engine components.
How do I diagnose the P066F code?
Use an OBDII scanner to confirm the code, inspect the glow plug and its wiring for damage, and test for proper voltage and resistance in the cylinder 3 glow plug circuit.
How do you fix the P066F code on a 2014 Chevy Silverado?
Repairs may include replacing the cylinder 3 glow plug, repairing damaged wiring or connectors, or replacing the glow plug control module if it’s defective.
How much does it cost to fix the P066F code?
The repair cost can range from $100 to $300, depending on whether the issue is a faulty glow plug, damaged wiring, or a malfunctioning control module.
Can a bad glow plug cause permanent engine damage?
While a bad glow plug itself won’t directly damage the engine, prolonged starting issues and incomplete combustion can lead to wear on other engine components over time.
How can I prevent the P066F code from occurring again?
Regular maintenance, including inspecting glow plugs and their wiring, can help prevent this issue. Use quality parts when replacing glow plugs.
Is it necessary to replace all glow plugs if one fails?
It’s not required, but replacing all glow plugs together can save labor costs and ensure consistent performance, especially if they are near the end of their lifespan.
Discuss the causes and fixes for P066F 2014 Chevrolet Silverado OBDII Code
Code P066F 2014 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.