P066C 2018 Chevrolet Silverado Code - Cylinder 2 Glow Plug Control Circuit Low Voltage
Quick Answer
The P066C diagnostic trouble code (DTC) on a 2018 Chevrolet Silverado indicates that there is a low voltage condition detected in the cylinder 2 glow plug control circuit. Common causes include Faulty glow plug in cylinder 2, Damaged wiring 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
- P066C 2018 Chevrolet Silverado indicates Cylinder 2 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty glow plug in cylinder 2, Damaged wiring 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 P066C 2018 Chevrolet Silverado Description
The P066C diagnostic trouble code (DTC) on a 2018 Chevrolet Silverado indicates that there is a low voltage condition detected in the cylinder 2 glow plug control circuit. Glow plugs are essential components in diesel engines, as they heat up the combustion chamber to facilitate cold starts. When the engine is cold, the glow plug control module sends a signal to the glow plugs to heat up, ensuring proper combustion. A low voltage in the cylinder 2 glow plug control circuit can lead to difficulties starting the engine, reduced performance, and increased emissions.
Common Causes of P066C 2018 Chevrolet Silverado
- Faulty glow plug in cylinder 2.
- Damaged wiring in the glow plug control circuit.
- Malfunctioning glow plug control module.
- Poor electrical connection in the circuit.
- Corrosion or contamination in the circuit.
Symptoms of P066C 2018 Chevrolet Silverado
- Difficulty starting the engine, especially in cold weather.
- Rough idling or engine misfires.
- Decreased fuel efficiency.
- Illumination of the check engine light.
- Engine stalling or hesitation during acceleration.
How to Fix P066C 2018 Chevrolet Silverado
- Begin by diagnosing the specific cause of the low voltage condition using a diagnostic scanner to read the DTC and perform electrical testing on the glow plug control circuit.
- Inspect the glow plug in cylinder 2 for proper operation and replace it if necessary.
- Check the wiring in the glow plug control circuit for any damage or corrosion and repair or replace as needed.
- Test the glow plug control module for functionality and replace if found to be faulty.
- Clear the DTC from the vehicle's computer and test the vehicle to ensure the issue has been resolved.
Cost to Fix P066C 2018 Chevrolet Silverado
The typical repair costs for addressing a P066C code on a 2018 Chevrolet Silverado 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, so it's advisable to check with local shops for a more accurate estimate. Keep in mind that rates may be higher at dealerships or in metropolitan areas, while independent shops often offer more competitive pricing.
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