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P068C 2017 Chevrolet Silverado Code - Cylinder 7 Glow Plug Control Circuit Low Voltage

Quick Answer

The P068C diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates a problem with the cylinder 7 glow plug control circuit experiencing low voltage. Common causes include Faulty glow plug: A defective glow plug in cylinder 7 can cause low voltage in the circuit, Wiring issues: Damaged or corroded wiring connections can disrupt the flow of voltage to the glow plug, Glow plug relay failure: A malfunctioning relay can prevent the glow plug from receiving the necessary voltage. 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
P068C 2017 Chevrolet Silverado indicates Cylinder 7 Glow Plug Control Circuit Low Voltage.
Common causes
Common causes include Faulty glow plug: A defective glow plug in cylinder 7 can cause low voltage in the circuit, Wiring issues: Damaged or corroded wiring connections can disrupt the flow of voltage to the glow plug, Glow plug relay failure: A malfunctioning relay can prevent the glow plug from receiving the necessary voltage.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P068C 2017 Chevrolet Silverado Description

The P068C diagnostic trouble code (DTC) for a 2017 Chevrolet Silverado indicates a problem with the cylinder 7 glow plug control circuit experiencing low voltage. Glow plugs are essential components in diesel engines that help with cold starts by heating the combustion chamber to facilitate ignition. In this case, cylinder 7's glow plug control circuit is not receiving the necessary voltage to operate effectively, which can lead to difficulties starting the engine, reduced performance, and potential long-term damage if left unresolved.

OBDII Code P068C 2017 Chevrolet Silverado - Cylinder 7 Glow Plug Control Circuit Low Voltage
P068C 2017 Chevrolet Silverado Code - Cylinder 7 Glow Plug Control Circuit Low Voltage

Common Causes of P068C 2017 Chevrolet Silverado

  1. Faulty glow plug: A defective glow plug in cylinder 7 can cause low voltage in the circuit.
  2. Wiring issues: Damaged or corroded wiring connections can disrupt the flow of voltage to the glow plug.
  3. Glow plug relay failure: A malfunctioning relay can prevent the glow plug from receiving the necessary voltage.
  4. Glow plug control module issues: Problems with the control module can lead to voltage irregularities in the circuit.
  5. Electrical system problems: Issues with the vehicle's electrical system, such as a weak battery or alternator, can affect the glow plug circuit.

Symptoms of P068C 2017 Chevrolet Silverado

  1. Hard starting: Difficulty starting the engine, especially in cold weather.
  2. Rough idling: The engine may run unevenly or shake at idle.
  3. Decreased power: Reduced engine performance and acceleration.
  4. Increased emissions: Higher levels of exhaust emissions due to incomplete combustion.
  5. Check Engine Light: The vehicle's onboard diagnostic system may illuminate the Check Engine Light to indicate a problem.

How to Fix P068C 2017 Chevrolet Silverado

  1. Diagnose the issue: Use a diagnostic scanner to read the DTC and pinpoint the specific cylinder 7 glow plug control circuit problem.
  2. Inspect glow plug and wiring: Check the condition of the glow plug and wiring connections for any damage or corrosion.
  3. Test glow plug relay: Verify the functionality of the glow plug relay to ensure it is sending the correct voltage to the glow plug.
  4. Check glow plug control module: Test the control module for any faults that may be causing the low voltage issue.
  5. Repair or replace components: Depending on the findings, repair or replace the faulty glow plug, wiring, relay, or control module to restore proper operation.

Cost to Fix P068C 2017 Chevrolet Silverado

The typical repair costs for addressing a cylinder 7 glow plug control circuit low voltage issue in a 2017 Chevrolet Silverado can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to inquire about local rates for a more accurate estimate. Keep in mind that rates may be higher at dealerships or metropolitan areas and lower at independent shops.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P068C 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P068C in a 2017 Chevrolet Silverado?

The common symptoms of OBDII code P068C, Cylinder 7 Glow Plug Control Circuit Low Voltage in a 2017 Chevrolet Silverado, may include rough idling, decreased engine performance, and the illumination of the check engine light.

2. What can cause the OBDII code P068C to trigger in a 2017 Chevrolet Silverado?

The OBDII code P068C in a 2017 Chevrolet Silverado is typically triggered by issues such as a faulty glow plug, damaged wiring in the glow plug circuit, or a malfunctioning glow plug control module.

3. How can I diagnose the Cylinder 7 Glow Plug Control Circuit Low Voltage issue in my 2017 Chevrolet Silverado?

To diagnose the Cylinder 7 Glow Plug Control Circuit Low Voltage issue in a 2017 Chevrolet Silverado, you can use an OBDII scanner to retrieve the specific fault code, visually inspect the glow plug and its wiring, and test the glow plug control module for proper functionality.

4. What are the possible repair options for the OBDII code P068C in a 2017 Chevrolet Silverado?

Repair options for the OBDII code P068C in a 2017 Chevrolet Silverado may include replacing the faulty glow plug, repairing or replacing damaged wiring in the glow plug circuit, or replacing the defective glow plug control module.

5. Can I continue driving my 2017 Chevrolet Silverado with the OBDII code P068C illuminated?

It is not recommended to continue driving your 2017 Chevrolet Silverado with the OBDII code P068C illuminated, as it can lead to further engine damage and decreased performance. It is advised to address the issue promptly.

6. Will resetting the check engine light resolve the OBDII code P068C issue in my 2017 Chevrolet Silverado?

Resetting the check engine light may temporarily turn off the warning indicator, but it will not fix the underlying problem causing the OBDII code P068C in a 2017 Chevrolet Silverado. Proper diagnostics and repair are necessary.

7. What role do glow plugs play in the operation of a 2017 Chevrolet Silverado?

Glow plugs in a 2017 Chevrolet Silverado are essential for aiding in cold start-ups by preheating the air in the combustion chamber. They ensure efficient ignition and combustion of the diesel fuel in the engine.

8. How can I prevent the recurrence of the OBDII code P068C in my 2017 Chevrolet Silverado?

To prevent the recurrence of the OBDII code P068C in a 2017 Chevrolet Silverado, it is essential to perform regular maintenance checks on the glow plugs, wiring, and control module. Additionally, using high-quality diesel fuel can help maintain proper engine performance.

9. Are there any safety precautions to consider when working on the glow plug system of a 2017 Chevrolet Silverado?

When working on the glow plug system of a 2017 Chevrolet Silverado, it is important to disconnect the battery, allow the engine to cool down, and follow proper safety procedures to prevent any electrical hazards or injuries.

10. How long does it typically take to repair the Cylinder 7 Glow Plug Control Circuit Low Voltage issue in a 2017 Chevrolet Silverado?

The repair time for the Cylinder 7 Glow Plug Control Circuit Low Voltage issue in a 2017 Chevrolet Silverado can vary depending on the exact cause of the problem and the extent of the repairs needed. It may range from a few hours to a full day in some cases.

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