P066C 2017 Chevrolet Silverado Code - Cylinder 2 Glow Plug Control Circuit Low Voltage
Quick Answer
The P066C diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado specifically relates to the Cylinder 2 Glow Plug Control Circuit registering low voltage. Common causes include Faulty glow plug in Cylinder 2, Damaged wiring or connectors in the glow plug control circuit, Malfunctioning glow plug relay. 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 2017 Chevrolet Silverado indicates Cylinder 2 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty glow plug in Cylinder 2, Damaged wiring or connectors in the glow plug control circuit, Malfunctioning glow plug relay.
- 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 2017 Chevrolet Silverado Description
The P066C diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado specifically relates to the Cylinder 2 Glow Plug Control Circuit registering low voltage. Glow plugs are essential components in diesel engines, as they heat the combustion chamber to facilitate cold starts. When the engine is cold, the glow plugs heat up to ensure proper ignition of the fuel-air mixture. In this case, the control circuit for the glow plug in Cylinder 2 is not receiving sufficient voltage to function correctly.
Common Causes of P066C 2017 Chevrolet Silverado
- Faulty glow plug in Cylinder 2.
- Damaged wiring or connectors in the glow plug control circuit.
- Malfunctioning glow plug relay.
- Issues with the engine control module (ECM).
- Corrosion or poor electrical connections in the circuit.
Symptoms of P066C 2017 Chevrolet Silverado
- Difficulty starting the engine, especially in cold weather.
- Rough idling or misfires upon startup.
- Decreased fuel efficiency.
- Increased emissions.
- Illumination of the check engine light on the dashboard.
How to Fix P066C 2017 Chevrolet Silverado
- Begin by diagnosing the specific cause of the low voltage in the Cylinder 2 glow plug control circuit using a diagnostic scanner to retrieve the trouble codes and pinpoint the issue.
- Inspect the glow plug in Cylinder 2 for any signs of damage or wear and replace it if necessary.
- Check the wiring and connectors in the control circuit for any damage, corrosion, or loose connections. Repair or replace as needed.
- Test the glow plug relay to ensure it is functioning correctly. Replace if found to be faulty.
- If the issue persists, consider checking the ECM for any faults or reprogramming it to address the low voltage issue.
Cost to Fix P066C 2017 Chevrolet Silverado
The typical repair costs for addressing a P066C code in a 2017 Chevrolet Silverado can vary depending on the specific cause of the issue. On average, the cost of replacing a glow plug can range from $50 to $150 per plug, while the cost of a glow plug relay can range from $50 to $100. Labor costs for diagnosis and repair can add an additional $100 to $300, depending on the shop's hourly rates and the complexity of the repair. It's advisable to consult with a trusted mechanic or dealership to get a more accurate estimate based on your vehicle's specific needs and location.
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Frequently Asked Questions about P066C 2017 Chevrolet Silverado Code
What does the OBDII code P066C mean for a 2017 Chevrolet Silverado?
The code P066C indicates that the Cylinder 2 Glow Plug Control Circuit is experiencing low voltage, which may affect the glow plug's operation in the engine.
What are the common symptoms of code P066C in a 2017 Chevrolet Silverado?
Symptoms include difficulty starting in cold weather, poor engine performance, illuminated check engine light, and potentially rough idling.
What causes the P066C code to appear in a 2017 Chevrolet Silverado?
Common causes include a faulty glow plug, damaged wiring or connectors in the glow plug circuit, a malfunctioning glow plug control module, or a weak battery.
How can I diagnose the P066C code on my 2017 Chevrolet Silverado?
Diagnosis involves checking the glow plug for cylinder 2, inspecting the wiring and connectors for damage or corrosion, testing the glow plug control module, and measuring circuit voltage.
Can I drive my 2017 Chevrolet Silverado with the P066C code?
While the truck may still run, driving with this code can lead to increased emissions, poor performance, and difficulty starting in cold weather. It's best to address the issue promptly.
How do I fix the P066C code on a 2017 Chevrolet Silverado?
Repairs may include replacing the faulty glow plug, repairing or replacing damaged wiring, cleaning corroded connections, or replacing the glow plug control module if it's defective.
How much does it cost to fix the P066C code on a 2017 Chevrolet Silverado?
Repair costs vary, but replacing a glow plug typically costs $100-$300, while fixing wiring or replacing the control module could cost more depending on labor and parts.
Can a weak battery trigger the P066C code in my 2017 Chevrolet Silverado?
Yes, a weak or failing battery can cause low voltage in the glow plug circuit and trigger the P066C code.
How do I prevent the P066C code from occurring again in my 2017 Chevrolet Silverado?
Regular maintenance, such as inspecting wiring and connectors, ensuring the battery is in good condition, and replacing glow plugs as needed, can help prevent this code.
Will clearing the P066C code fix the problem on my 2017 Chevrolet Silverado?
Clearing the code may turn off the check engine light temporarily, but the underlying issue must be repaired to prevent the code from returning.
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