P068D 2017 Chevrolet Silverado Code - Cylinder 7 Glow Plug Control Circuit High Voltage
Quick Answer
The P068D diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates a problem with the cylinder 7 glow plug control circuit experiencing high voltage. Common causes include Faulty glow plug in cylinder 7, Short circuit 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
- P068D 2017 Chevrolet Silverado indicates Cylinder 7 Glow Plug Control Circuit High Voltage.
- Common causes
- Common causes include Faulty glow plug in cylinder 7, Short circuit 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 P068D 2017 Chevrolet Silverado Description
The P068D diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates a problem with the cylinder 7 glow plug control circuit experiencing high voltage. Glow plugs are essential components in diesel engines, as they heat up the combustion chamber to facilitate cold starts. When the engine control module (ECM) detects that the voltage in the cylinder 7 glow plug control circuit is higher than normal, it triggers this code. This issue can lead to difficulties starting the engine, reduced fuel efficiency, and potential damage to the engine if left unresolved.
Common Causes of P068D 2017 Chevrolet Silverado
- Faulty glow plug in cylinder 7.
- Short circuit in the glow plug control circuit.
- Malfunctioning glow plug relay.
- Wiring or connector issues in the cylinder 7 glow plug control circuit.
- ECM software or hardware issues.
Symptoms of P068D 2017 Chevrolet Silverado
- Difficulty starting the engine, especially in cold weather.
- Reduced fuel efficiency.
- Rough idling or engine misfires.
- Illumination of the check engine light.
- Increased exhaust emissions.
How to Fix P068D 2017 Chevrolet Silverado
- Begin by diagnosing the specific cause of the high voltage in the cylinder 7 glow plug control circuit using a diagnostic scanner.
- Inspect the glow plug in cylinder 7 to determine if it is faulty and needs replacement.
- Check the glow plug relay for proper operation and replace if necessary.
- Inspect the wiring and connectors in the glow plug control circuit for any damage or corrosion, repairing or replacing as needed.
- Clear the DTC from the ECM memory and test the vehicle to ensure the issue has been resolved.
Cost to Fix P068D 2017 Chevrolet Silverado
The cost of repairing a cylinder 7 glow plug control circuit high voltage issue in a 2017 Chevrolet Silverado can vary depending on the specific cause of the problem. On average, the cost of replacing a glow plug ranges from $50 to $150 per plug, while a glow plug relay can cost between $50 and $100. Labor costs at an auto repair shop typically range from $80 to $150 per hour. Overall, the total repair cost for this issue could range from $200 to $500, including parts and labor. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate based on your location and vehicle specifics.
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Frequently Asked Questions about P068D 2017 Chevrolet Silverado Code
What does OBDII code P068D mean on a 2017 Chevrolet Silverado?
P068D indicates a high voltage issue in the Cylinder 7 Glow Plug Control Circuit, which is responsible for preheating the cylinder for better combustion in cold starts.
What are the symptoms of code P068D on a 2017 Chevrolet Silverado?
Common symptoms include difficulty starting in cold weather, reduced engine performance, a lit check engine light, and possible rough idling.
What causes the P068D code on a 2017 Chevrolet Silverado?
Possible causes include a faulty glow plug, damaged wiring or connectors in the glow plug circuit, a malfunctioning glow plug control module, or corroded electrical connections.
Can I drive my 2017 Chevrolet Silverado with a P068D code?
While the vehicle may still be drivable, ignoring the issue can lead to harder starts in cold weather and potentially reduced engine performance over time.
How is the P068D code diagnosed?
A mechanic will use a scan tool to confirm the code, inspect the glow plug circuit for damage, test the glow plug's resistance, and check the control module for proper operation.
How do I fix the P068D code on my 2017 Chevrolet Silverado?
Repair steps may include replacing the faulty glow plug, repairing or replacing damaged wiring, cleaning corroded connections, or replacing the glow plug control module if necessary.
How much does it cost to repair code P068D on a 2017 Chevrolet Silverado?
The cost depends on the exact issue. Replacing a glow plug typically costs $50–$150, while repairing wiring or replacing the control module can range from $100–$500.
Can a weak battery cause the P068D code?
Yes, a weak or failing battery may result in improper voltage to the glow plug circuit, which can trigger the P068D code.
Is the P068D code specific to Cylinder 7?
Yes, this code specifically refers to a high voltage issue in the glow plug control circuit for Cylinder 7.
Do I need special tools to fix the P068D code on a 2017 Chevrolet Silverado?
Yes, diagnosing and repairing this code may require a multimeter for testing resistance, a scan tool for code verification, and basic tools for accessing and replacing components.
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