P066C Chevrolet Code - Cylinder 2 Glow Plug Control Circuit Low Voltage
Quick Answer
The P066C code for Chevrolet vehicles indicates an issue with the Cylinder 2 Glow Plug Control Circuit experiencing low voltage. Common causes include Faulty glow plug control module, Damaged wiring harness or connectors, Failed glow plug in Cylinder 2. 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
- P066C Chevrolet indicates Cylinder 2 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty glow plug control module, Damaged wiring harness or connectors, Failed glow plug in Cylinder 2.
- 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 P066C Chevrolet Description
The P066C code for Chevrolet vehicles indicates an issue with the Cylinder 2 Glow Plug Control Circuit experiencing low voltage. Glow plugs are essential components in diesel engines, especially during cold starts, as they heat the combustion chamber for easier ignition. When the voltage in the control circuit of the glow plug for Cylinder 2 is too low, it can lead to improper functioning of the plug, causing difficulties in starting the engine, reduced performance, and potential long-term damage to the engine.
Common Causes of P066C Chevrolet
- Faulty glow plug control module.
- Damaged wiring harness or connectors.
- Failed glow plug in Cylinder 2.
- Corrosion or poor connections in the circuit.
- Issues with the vehicle's electrical system.
Symptoms of P066C Chevrolet
- Difficulty starting the engine, especially in cold weather.
- Rough idling or engine hesitation.
- Reduced engine performance and power.
- Increased fuel consumption.
- Illumination of the Check Engine Light.
How to Fix P066C Chevrolet
- Diagnose the specific cause of the low voltage in the Cylinder 2 glow plug control circuit using a diagnostic scanner.
- Inspect the wiring harness, connectors, and glow plug for any damage or corrosion.
- Test the glow plug control module for proper functionality.
- Replace any faulty components such as the glow plug, control module, or wiring as needed.
- Clear the error code and perform a test drive to ensure the issue has been resolved.
Cost to Fix P066C Chevrolet
The typical repair costs for addressing a P066C code in a Chevrolet vehicle can vary depending on the specific cause of the issue and the parts needed for replacement. On average, the repair cost can range from $150 to $400, including parts and labor. However, it's important to note that the actual costs can be higher or lower based on factors such as the location of the repair shop, the vehicle's make and model, and the extent of the repairs needed. Additionally, the diagnosis time and labor rates at auto repair shops may vary, with hourly rates typically ranging between $80 and $150. It is advisable to consult with a trusted mechanic or repair shop to obtain a more accurate estimate based on your vehicle's specific needs.
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Information for Specific Chevrolet Models
- P066C 2014 Chevrolet Silverado — Cylinder 2 Glow Plug Control Circuit Low Voltage
- P066C 2015 Chevrolet Silverado — Cylinder 2 Glow Plug Control Circuit Low Voltage
- P066C 2016 Chevrolet Silverado — Cylinder 2 Glow Plug Control Circuit Low Voltage
- P066C 2017 Chevrolet Silverado — Cylinder 2 Glow Plug Control Circuit Low Voltage
- P066C 2018 Chevrolet Silverado — Cylinder 2 Glow Plug Control Circuit Low Voltage
Frequently Asked Questions about P066C Chevrolet Code
What does the OBDII code P066C mean for a Chevrolet?
P066C indicates that the Cylinder 2 Glow Plug Control Circuit is experiencing low voltage, which affects the glow plug's ability to heat properly for diesel engine starting.
What are the common symptoms of code P066C?
Symptoms include difficulty starting the engine, rough idling, increased exhaust smoke during startup, and reduced engine performance in cold weather.
What causes code P066C on a Chevrolet?
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.
How can I diagnose code P066C?
Start by inspecting the glow plug, wiring, and connectors for damage or corrosion. Use a multimeter to check for proper voltage in the glow plug circuit and scan for related codes to pinpoint the issue.
Can I drive my Chevrolet with code P066C?
You can drive the vehicle, but it may struggle to start, especially in cold weather. Prolonged driving with this issue could lead to further damage or reduced engine performance.
How do I fix code P066C on a Chevrolet?
Repairs may include replacing the faulty glow plug, repairing damaged wiring or connectors, cleaning corroded connections, or replacing the glow plug control module if necessary.
How much does it cost to repair code P066C?
The repair cost can vary depending on the specific issue. Glow plug replacement typically costs $100-$300, while control module repairs may range from $300-$500, excluding labor.
Can a bad glow plug cause other engine problems?
Yes, a bad glow plug can lead to poor engine performance, increased emissions, and difficulty starting the vehicle in cold conditions.
How do I prevent code P066C from occurring?
Regular maintenance, including inspecting the glow plug system and addressing wiring issues promptly, can help prevent this code.
Can a failing glow plug control module trigger code P066C?
Yes, a malfunctioning glow plug control module can cause low voltage in the cylinder 2 glow plug circuit, leading to code P066C.
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