P066E 2016 GMC Sierra Code - Cylinder 3 Glow Plug Control Circuit Low Voltage
Quick Answer
The diagnostic trouble code P066E for a 2016 GMC Sierra indicates a problem with the Cylinder 3 Glow Plug Control Circuit, specifically low voltage. Common causes include Faulty glow plug in cylinder 3, Wiring issues, such as a short or open circuit, Faulty 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
- P066E 2016 GMC Sierra indicates Cylinder 3 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty glow plug in cylinder 3, Wiring issues, such as a short or open circuit, Faulty 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 P066E 2016 GMC Sierra Description
The diagnostic trouble code P066E for a 2016 GMC Sierra indicates a problem with the Cylinder 3 Glow Plug Control Circuit, specifically low voltage. Glow plugs are essential components in diesel engines, as they heat up the combustion chamber to aid in cold starting, reduce emissions, and improve fuel efficiency. When the control circuit for the glow plug in cylinder 3 detects low voltage, it means that the glow plug is not receiving the necessary electrical power to function properly.
Common Causes of P066E 2016 GMC Sierra
- Faulty glow plug in cylinder 3
- Wiring issues, such as a short or open circuit
- Faulty glow plug control module
- Corrosion or poor connections in the electrical system
- Issues with the vehicle's battery or charging system
Symptoms of P066E 2016 GMC Sierra
- Difficulties starting the engine, especially in cold weather
- Rough idling or misfires
- Reduced engine power
- Increased emissions
- Decreased fuel efficiency
How to Fix P066E 2016 GMC Sierra
- Perform a visual inspection of the glow plug, wiring, and control module to check for any visible damage or corrosion.
- Test the glow plug using a multimeter to determine if it is functioning properly.
- Check the wiring and connections for any issues, such as breaks or loose connections.
- Replace the faulty glow plug, control module, or any damaged wiring or connections as needed.
- Clear the diagnostic trouble codes and perform a test drive to ensure the issue has been resolved.
Cost to Fix P066E 2016 GMC Sierra
The typical repair costs for addressing a Cylinder 3 Glow Plug Control Circuit Low Voltage issue in a 2016 GMC Sierra can vary depending on the specific parts that need to be replaced and the labor involved. On average, the cost for parts such as a glow plug or control module can range from $50 to $200 each, while labor costs may range from $100 to $300. Additional costs for diagnostic testing and potential electrical system repairs should also be considered. Overall, the total repair cost could range from $200 to $800 or more. It's important to note that labor rates and part prices can vary based on location, the specific auto repair shop, and the vehicle's make and model. It's recommended to obtain a detailed estimate from a qualified mechanic or repair shop to get an accurate cost assessment.
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