P066F 2016 Chevrolet Silverado Code - Cylinder 3 Glow Plug Control Circuit High Voltage
Quick Answer
The P066F code indicates that there is a high voltage condition detected in the glow plug control circuit for cylinder 3 of a 2016 Chevrolet Silverado. Common causes include Faulty glow plug that is shorted or damaged, Wiring issues, such as frayed or corroded wires in the glow plug circuit, Malfunctioning Engine Control Module (ECM) that incorrectly regulates voltage. 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 2016 Chevrolet Silverado indicates Cylinder 3 Glow Plug Control Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug that is shorted or damaged, Wiring issues, such as frayed or corroded wires in the glow plug circuit, Malfunctioning Engine Control Module (ECM) that incorrectly regulates voltage.
- 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 2016 Chevrolet Silverado Description
The P066F code indicates that there is a high voltage condition detected in the glow plug control circuit for cylinder 3 of a 2016 Chevrolet Silverado. Glow plugs are essential components in diesel engines, as they help to preheat the combustion chamber for easier starting and improved fuel combustion, especially in cold weather conditions. When the Engine Control Module (ECM) detects a voltage level that exceeds the expected range for the glow plug circuit, it triggers this diagnostic trouble code (DTC).
Common Causes of P066F 2016 Chevrolet Silverado
- Faulty glow plug that is shorted or damaged.
- Wiring issues, such as frayed or corroded wires in the glow plug circuit.
- Malfunctioning Engine Control Module (ECM) that incorrectly regulates voltage.
- Poor electrical connections or ground issues affecting the glow plug circuit.
- Overvoltage from the vehicle's electrical system, possibly due to a failing alternator.
Symptoms of P066F 2016 Chevrolet Silverado
- Difficulty starting the engine, especially in cold weather.
- Rough idling or engine misfires.
- Increased exhaust smoke, particularly during startup.
- Reduced fuel efficiency and overall engine performance.
- Activation of the check engine light on the dashboard.
How to Fix P066F 2016 Chevrolet Silverado
- Diagnostic Testing: Begin with a thorough diagnostic to confirm the P066F code and check for any additional codes that may provide further insight into the issue.
- Visual Inspection: Inspect the glow plug and its wiring harness for any visible damage, corrosion, or loose connections. This step is crucial to identify any obvious issues that could be causing the high voltage condition.
- Test Glow Plug Resistance: Measure the resistance of the glow plug using a multimeter. If the resistance is outside the manufacturer's specifications, replace the glow plug.
- Check Wiring and Connections: Use a wiring diagram to trace the glow plug circuit and check for shorts, breaks, or poor connections. Repair or replace any damaged wiring as necessary.
- ECM Evaluation: If the glow plug and wiring are in good condition, further investigate the ECM for faults. Reprogramming or replacing the ECM may be necessary if it is found to be malfunctioning.
Cost to Fix P066F 2016 Chevrolet Silverado
The cost to repair a P066F code can vary significantly based on the specific issue identified during diagnosis. Typical costs may range from $200 to $800, depending on whether the repair involves simply replacing a glow plug or if more extensive electrical work or ECM replacement is required. Labor costs can vary widely, with most auto repair shops charging between $80 and $150 per hour. Rates may be higher in metropolitan areas or at dealerships, while independent shops may offer lower rates. It is advisable to check local rates and get multiple estimates for a more precise cost assessment.
Need more information about the P066F 2016 Chevrolet Silverado code?
Need more information on how to fix the P066F 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P066F 2016 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P066F 2016 Chevrolet Silverado Code
What does the OBDII code P066F mean for a 2016 Chevrolet Silverado?
P066F indicates a high voltage issue in the glow plug control circuit for cylinder 3, which may affect the engine's cold start performance.
What are the symptoms of code P066F in a 2016 Chevrolet Silverado?
Symptoms may include difficulty starting the engine in cold weather, rough idling, reduced fuel efficiency, and an illuminated check engine light.
What causes the P066F code on a 2016 Chevrolet Silverado?
Common causes include a faulty cylinder 3 glow plug, damaged wiring or connectors, or a malfunctioning glow plug control module.
Can I drive my 2016 Chevrolet Silverado with code P066F?
Driving with this code may be possible, but it could lead to poor performance, especially in cold weather, and may cause further engine issues over time.
How do you diagnose the P066F code?
Diagnosis involves inspecting the glow plug for cylinder 3, testing the wiring and connectors for continuity or damage, and checking the function of the glow plug control module.
How do you fix code P066F on a 2016 Chevrolet Silverado?
Repairs may include replacing the faulty cylinder 3 glow plug, repairing damaged wiring, or replacing the glow plug control module if necessary.
What tools are needed to fix the P066F code?
You may need a multimeter, OBDII scanner, and basic hand tools to diagnose and repair the issue.
What is the cost to repair the P066F code?
Repair costs vary but may range from $100 to $300, depending on whether the glow plug, wiring, or control module needs replacement.
Can a bad glow plug cause long-term damage?
Yes, a malfunctioning glow plug can lead to starting issues and potential damage to the engine's cylinders or other components over time.
How can I prevent the P066F code from occurring?
Regular maintenance, including checking the glow plugs and inspecting wiring for wear, can help prevent this code from appearing.
Discuss the causes and fixes for P066F 2016 Chevrolet Silverado OBDII Code
Code P066F 2016 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.