P066F 2017 Chevrolet Silverado Code - Cylinder 3 Glow Plug Control Circuit High Voltage
Quick Answer
The diagnostic trouble code P066F on a 2017 Chevrolet Silverado indicates an issue with the Cylinder 3 Glow Plug Control Circuit High Voltage. Common causes include Faulty glow plug in Cylinder 3, Damaged wiring harness or connector in the glow plug control circuit, Malfunctioning glow plug relay. 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 2017 Chevrolet Silverado indicates Cylinder 3 Glow Plug Control Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug in Cylinder 3, Damaged wiring harness or connector in the glow plug control circuit, Malfunctioning glow plug relay.
- 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 2017 Chevrolet Silverado Description
The diagnostic trouble code P066F on a 2017 Chevrolet Silverado indicates an issue with the Cylinder 3 Glow Plug Control Circuit High Voltage. Glow plugs are essential components in diesel engines that help with the ignition process by heating up the air in the combustion chamber. The control circuit is responsible for regulating the voltage supplied to the glow plug to ensure proper operation.
Common Causes of P066F 2017 Chevrolet Silverado
- Faulty glow plug in Cylinder 3
- Damaged wiring harness or connector in the glow plug control circuit
- Malfunctioning glow plug relay
- Issues with the engine control module (ECM)
- Corrosion or poor connections in the electrical system
Symptoms of P066F 2017 Chevrolet Silverado
- Difficulty starting the engine, especially in cold weather
- Rough idling or unstable engine performance
- Reduced engine power and acceleration
- Increased fuel consumption
- Engine misfires or hesitation during acceleration
How to Fix P066F 2017 Chevrolet Silverado
- Begin by diagnosing the specific cause of the high voltage in the Cylinder 3 glow plug control circuit using a diagnostic scanner to retrieve freeze frame data and pinpoint the issue.
- Inspect the glow plug in Cylinder 3 for signs of damage or wear and replace if necessary.
- Check the wiring harness and connector for any damage or corrosion, repairing or replacing as needed.
- Test the glow plug relay for proper operation and replace if it is faulty.
- Verify the ECM's functionality and reprogram or replace it if required to correct the high voltage condition.
Cost to Fix P066F 2017 Chevrolet Silverado
The typical repair costs for addressing a P066F code on a 2017 Chevrolet Silverado can vary depending on the specific cause of the issue. Replacing a faulty glow plug can cost between $50 to $150, while repairing or replacing a damaged wiring harness or connector may range from $100 to $300. The cost of a new glow plug relay can be around $50 to $150, and reprogramming or replacing the ECM can cost between $200 to $500. Overall, the total repair cost can range from $300 to $1000, including parts and labor. It's essential to consult with a qualified mechanic to obtain an accurate estimate based on the specific diagnosis and repair required for your vehicle. Labor rates at auto repair shops typically range between $80 to $150 per hour, with variations based on location, vehicle make and model, and other factors.
Need more information about the P066F 2017 Chevrolet Silverado code?
Need more information on how to fix the P066F 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P066F 2017 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P066F 2017 Chevrolet Silverado Code
1. What does the OBDII code P066F mean for a 2017 Chevrolet Silverado?
The code P066F indicates a high voltage issue in the Cylinder 3 Glow Plug Control Circuit, meaning the circuit is experiencing a voltage level outside of its normal range.
2. What are the common symptoms of code P066F in a 2017 Chevrolet Silverado?
Symptoms may include difficulty starting the engine in cold weather, reduced engine performance, a check engine light, or rough idling.
3. What causes the P066F code to appear on a 2017 Chevrolet Silverado?
Common causes include a faulty glow plug, damaged wiring or connectors in the glow plug circuit, a malfunctioning glow plug control module, or corrosion in the electrical connections.
4. Can I still drive my 2017 Chevrolet Silverado with a P066F code?
While the truck may still run, it could experience starting issues in colder temperatures, reduced efficiency, and potential long-term damage to the engine if not addressed promptly.
5. How do I diagnose the P066F code on a 2017 Chevrolet Silverado?
Diagnosis involves inspecting the glow plug for Cylinder 3, checking the wiring and connectors for damage, testing the glow plug control module, and measuring the circuit voltage with a multimeter.
6. How do I fix the P066F code on a 2017 Chevrolet Silverado?
Repairs may include replacing the faulty glow plug, repairing or replacing damaged wires or connectors, cleaning corroded connections, or replacing the glow plug control module if necessary.
7. How much does it cost to fix the P066F code on a 2017 Chevrolet Silverado?
The repair cost depends on the issue, ranging from $100-$300 for glow plug replacement to $500 or more if the glow plug control module needs replacement.
8. Can a dirty or corroded connection cause the P066F code on my 2017 Chevrolet Silverado?
Yes, dirty or corroded connections can disrupt voltage flow and cause the glow plug control circuit to register a high voltage.
9. Does the P066F code affect fuel efficiency in a 2017 Chevrolet Silverado?
Yes, a malfunctioning glow plug system can lead to inefficient combustion, potentially reducing fuel efficiency.
10. Will clearing the P066F code with a scanner fix my 2017 Chevrolet Silverado?
Clearing the code may turn off the check engine light temporarily, but if the underlying issue isn’t resolved, the code will reappear.
Discuss the causes and fixes for P066F 2017 Chevrolet Silverado OBDII Code
Code P066F 2017 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.