P066F 2014 GMC Sierra Code - Cylinder 3 Glow Plug Control Circuit High Voltage
Quick Answer
The P066F diagnostic trouble code (DTC) for a 2014 GMC Sierra specifically relates to the Cylinder 3 Glow Plug Control Circuit registering high voltage. Common causes include Faulty glow plug in cylinder 3, Wiring issues, such as a short circuit or open circuit in the glow plug control circuit, Malfunctioning glow plug control module. 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 GMC Sierra indicates Cylinder 3 Glow Plug Control Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug in cylinder 3, Wiring issues, such as a short circuit or open circuit in the glow plug control circuit, Malfunctioning glow plug control module.
- 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.
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Code P066F 2014 GMC Sierra Description
The P066F diagnostic trouble code (DTC) for a 2014 GMC Sierra specifically relates to the Cylinder 3 Glow Plug Control Circuit registering high voltage. Glow plugs are crucial components in diesel engines, especially during cold starts, as they heat the combustion chamber to aid in ignition. When the control circuit for the glow plug in cylinder 3 detects high voltage, it indicates a potential issue that can affect the engine's performance and efficiency.
Common Causes of P066F 2014 GMC Sierra
- Faulty glow plug in cylinder 3.
- Wiring issues, such as a short circuit or open circuit in the glow plug control circuit.
- Malfunctioning glow plug control module.
- Problem with the engine control unit (ECU).
- Corrosion or poor connections in the glow plug circuit.
Symptoms of P066F 2014 GMC Sierra
- Check Engine Light illuminated on the dashboard.
- Hard starting, especially in cold weather.
- Rough idling or engine misfires.
- Decreased fuel efficiency.
- Engine performance issues, such as lack of power or acceleration.
How to Fix P066F 2014 GMC Sierra
- Begin by conducting a thorough inspection of the glow plug in cylinder 3, checking for any signs of damage or malfunction.
- Test the glow plug control circuit for high voltage using a multimeter to pinpoint the exact source of the issue.
- Replace the faulty glow plug if necessary, ensuring proper installation and connection.
- Inspect the wiring and connections in the glow plug control circuit, repairing any damaged wires or addressing poor connections.
- If the issue persists, consider testing and potentially replacing the glow plug control module or consulting a professional for further diagnostics.
Cost to Fix P066F 2014 GMC Sierra
The typical repair costs for addressing a P066F code in a 2014 GMC Sierra can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically falling between $80 and $150. Factors such as location, vehicle make and model, and engine type can also influence repair costs. For a more accurate estimate, it's recommended to consult local auto repair shops for pricing information.
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