AutoCodes – Chevrolet – P068C 2014 Chevrolet Silverado

P068C 2014 Chevrolet Silverado Code - Cylinder 7 Glow Plug Control Circuit Low Voltage

Quick Answer

n the diesel engine, air alone is compressed in the cylinder. Common causes include Faulty cylinder #7 glow plug, Cylinder #7 glow plug harness is open or shorted, Cylinder #7 glow plug circuit poor electrical connection. 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 2014 Chevrolet Silverado indicates Cylinder 7 Glow Plug Control Circuit Low Voltage.
Common causes: Common causes include Faulty cylinder #7 glow plug, Cylinder #7 glow plug harness is open or shorted, Cylinder #7 glow plug circuit poor electrical connection.
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 Popularity 241

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Mar 24, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P068C 2014 Chevrolet Silverado Description

n the diesel engine, air alone is compressed in the cylinder. Then, after the air has been compressed, a charge of fuel is sprayed into the cylinder and ignition occurs, due to the heat of compression. Eight glow plugs are used as an aid to starting.
Control of the glow plugs is accomplished by the Glow Plug Control Module. The nominal voltage for the glow plugs is 5.4 volts. When the ignition is turned On, the Glow Plug Control Module applies 7.2 V for 2.2 s, then 5.7 V for 0.8 s, and then 5.4 V until 1200°C (2192°F) is reached. The maximum voltage of the system is 10 V. While the engine is running the voltage will vary between 4.7 - 10 V when in closed loop control to maintain a glow plug temperature that ranges from 1150° - 1180°C (2102° - 2156°F). The temperature and the power consumption are controlled between the Engine Control Module (ECM) and the Glow Plug Control Module within a wide range to suit the engine's pre-heating requirements. Each glow plug is energized individually. This capability yields more optimum heat times for the glow plugs, thus pre - glow times can be kept to a minimum for a short wait to crank times and maximum glow plug durability.

OBDII Code P068C 2014 Chevrolet Silverado - Cylinder 7 Glow Plug Control Circuit Low Voltage - AutoCodes.com — P068C 2014 Chevrolet Silverado Code - Cylinder 7 Glow Plug Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P068C 2014 Chevrolet Silverado?

Faulty cylinder #7 glow plug
Cylinder #7 glow plug harness is open or shorted
Cylinder #7 glow plug circuit poor electrical connection
Faulty Glow Plug Control Module

How to Fix the DTC P068C 2014 Chevrolet Silverado?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P068C 2014 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P068C 2014 Chevrolet Silverado code?

Need more information on how to fix the P068C 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P068C 2014 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 2014 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P068C in a 2014 Chevrolet Silverado related to the Cylinder 7 Glow Plug Control Circuit Low Voltage issue?

- Common symptoms include rough idling, decreased fuel efficiency, engine misfires, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P068C in a 2014 Chevrolet Silverado indicating a Cylinder 7 Glow Plug Control Circuit Low Voltage problem?

- Possible causes may include a faulty glow plug, damaged wiring or connectors in the glow plug circuit, a malfunctioning glow plug control module, or a problem with the PCM (Powertrain Control Module).

3. How serious is the Cylinder 7 Glow Plug Control Circuit Low Voltage issue indicated by OBDII code P068C in a 2014 Chevrolet Silverado?

- While the vehicle may still be operable with this issue, it is important to address it promptly to prevent potential engine damage and ensure optimal performance.

4. Can I continue driving my 2014 Chevrolet Silverado with OBDII code P068C related to Cylinder 7 Glow Plug Control Circuit Low Voltage until I can get it repaired?

- It is recommended to limit driving your vehicle with this issue to prevent further damage. Seek professional diagnosis and repair as soon as possible.

5. How can I diagnose and repair OBDII code P068C in a 2014 Chevrolet Silverado if it indicates a Cylinder 7 Glow Plug Control Circuit Low Voltage problem?

- Diagnosis typically involves checking the glow plug, inspecting the wiring and connectors, testing the glow plug control module, and scanning the PCM for related faults. Repair may involve replacing the faulty component or fixing wiring/connectors.

6. Is it possible to reset the OBDII code P068C in a 2014 Chevrolet Silverado without repairing the issue related to the Cylinder 7 Glow Plug Control Circuit Low Voltage?

- While clearing the code may temporarily turn off the Check Engine Light, the underlying problem will persist. It is important to address the root cause through proper diagnosis and repair.

7. How much can I expect to pay for repairing OBDII code P068C in a 2014 Chevrolet Silverado linked to Cylinder 7 Glow Plug Control Circuit Low Voltage?

- Repair costs can vary depending on the specific cause of the issue, the labor rates of the repair shop, and the cost of parts involved. It is advisable to obtain quotes from reputable mechanics.

8. Are there any preventive measures I can take to avoid encountering OBDII code P068C in my 2014 Chevrolet Silverado related to Cylinder 7 Glow Plug Control Circuit Low Voltage in the future?

- Regular maintenance, such as timely glow plug replacements and electrical system checks, can help prevent issues that may lead to the Cylinder 7 Glow Plug Control Circuit Low Voltage fault.

9. Can a DIY enthusiast with automotive repair experience tackle the repair of OBDII code P068C in a 2014 Chevrolet Silverado associated with Cylinder 7 Glow Plug Control Circuit Low Voltage?

- Depending on your skill level and access to tools, you may be able to diagnose and repair simpler aspects of the issue, such as checking and replacing glow plugs. However, complex diagnostics and repairs may require professional assistance.

10. Will fixing OBDII code P068C in a 2014 Chevrolet Silverado for the Cylinder 7 Glow Plug Control Circuit Low Voltage problem improve the performance and fuel efficiency of the vehicle?

- Addressing this issue can restore optimal engine performance, improve fuel efficiency, and prevent potential further damage, ensuring your vehicle operates as intended.