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P068E 2016 Chevrolet Silverado Code - Cylinder 8 Glow Plug Control Circuit Low Voltage

Quick Answer

The P068E diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado specifically relates to the Cylinder 8 Glow Plug Control Circuit Low Voltage. Common causes include Faulty glow plug in cylinder 8, Defective glow plug control module, Wiring issues or loose connections in the glow plug control circuit. 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
P068E 2016 Chevrolet Silverado indicates Cylinder 8 Glow Plug Control Circuit Low Voltage.
Common causes
Common causes include Faulty glow plug in cylinder 8, Defective glow plug control module, Wiring issues or loose connections in the glow plug control circuit.
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 10, 2024
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Code P068E 2016 Chevrolet Silverado Description

The P068E diagnostic trouble code (DTC) for a 2016 Chevrolet Silverado specifically relates to the Cylinder 8 Glow Plug Control Circuit Low Voltage. This code indicates that there is an issue with the control circuit for the glow plug in cylinder 8 of the engine. Glow plugs are crucial components in diesel engines, as they help with cold starts by heating the combustion chamber to aid in ignition. When the control circuit for the glow plug in cylinder 8 is experiencing low voltage, it can lead to difficulties starting the engine, reduced performance, and potential long-term damage to the engine if not addressed promptly.

OBDII Code P068E 2016 Chevrolet Silverado - Cylinder 8 Glow Plug Control Circuit Low Voltage
P068E 2016 Chevrolet Silverado Code - Cylinder 8 Glow Plug Control Circuit Low Voltage

Common Causes of P068E 2016 Chevrolet Silverado

  1. Faulty glow plug in cylinder 8
  2. Defective glow plug control module
  3. Wiring issues or loose connections in the glow plug control circuit
  4. Corrosion or damage to the electrical connectors
  5. Electrical system malfunctions or failures

Symptoms of P068E 2016 Chevrolet Silverado

  1. Difficulty starting the engine, especially in cold weather conditions
  2. Reduced engine performance and power
  3. Rough idling or engine vibrations
  4. Increased fuel consumption
  5. Illumination of the check engine light

How to Fix P068E 2016 Chevrolet Silverado

  1. Begin by inspecting the glow plug in cylinder 8 to check for any signs of damage or malfunction. Replace the glow plug if necessary.
  2. Check the glow plug control module for any faults or defects. Replace the control module if it is not functioning correctly.
  3. Inspect the wiring and connectors in the glow plug control circuit for any signs of damage, corrosion, or loose connections. Repair or replace any faulty components.
  4. Clear the diagnostic trouble codes from the vehicle's onboard computer using a scan tool.
  5. Test the vehicle to ensure that the issue has been resolved and that the engine is starting properly without any issues.

Cost to Fix P068E 2016 Chevrolet Silverado

The cost of repairing a P068E code on a 2016 Chevrolet Silverado can vary depending on the specific cause of the issue and the extent of the repairs needed. Generally, the cost of replacing a glow plug can range from $50 to $150 per plug, while the cost of a glow plug control module can be around $200 to $400. Labor costs for this type of repair can range from $100 to $300, with total repair costs potentially amounting to $300 to $800 or more. It is advisable to consult with a professional mechanic or service center to obtain a more accurate cost estimate based on your vehicle's specific needs.

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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 P068E 2016 Chevrolet Silverado Code

1. What does the OBDII code P068E mean on a 2016 Chevrolet Silverado?

P068E indicates an issue with the Cylinder 8 Glow Plug Control Circuit, specifically low voltage detected in the circuit.

2. What are the common symptoms of the P068E code in a 2016 Chevrolet Silverado?

Symptoms may include difficulty starting the engine in cold weather, rough idling, reduced fuel efficiency, and the check engine light being illuminated.

3. What causes the P068E code to appear in a 2016 Chevrolet Silverado?

Possible causes include a faulty cylinder 8 glow plug, damaged wiring or connectors in the glow plug circuit, a malfunctioning glow plug control module, or a low battery voltage.

4. Can I drive my 2016 Chevrolet Silverado with the P068E code?

While the truck may still be drivable, ignoring this issue can result in poor cold-start performance and potential long-term damage to the engine or electrical components.

5. How do you diagnose the P068E code on a 2016 Chevrolet Silverado?

Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting the wiring and connectors for damage, testing the glow plug for proper resistance, and checking the glow plug control module for proper operation.

6. How do you fix the P068E code on a 2016 Chevrolet Silverado?

Repairs might include replacing the faulty glow plug, repairing or replacing damaged wiring or connectors, or replacing the glow plug control module if it is defective.

7. How much does it cost to repair the P068E code on a 2016 Chevrolet Silverado?

Repair costs vary, but replacing a glow plug typically costs $50–$150 for parts and labor, while repairing wiring or replacing the glow plug control module can cost more depending on the extent of the issue.

8. Can a weak battery cause the P068E code in a 2016 Chevrolet Silverado?

Yes, a weak or low-voltage battery can lead to insufficient power to the glow plug circuit, triggering the P068E code.

9. Is it necessary to replace all glow plugs if one is faulty in a 2016 Chevrolet Silverado?

It’s not strictly necessary, but replacing all glow plugs simultaneously is often recommended to maintain even performance and avoid repeated repairs.

10. What tools are needed to troubleshoot the P068E code on a 2016 Chevrolet Silverado?

You’ll need an OBDII scanner, a multimeter to test voltage and resistance, and basic hand tools for accessing and replacing the glow plug or related components.

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