P068E 2014 GMC Sierra Code - Cylinder 8 Glow Plug Control Circuit Low Voltage
Quick Answer
The diagnostic trouble code P068E for a 2014 GMC Sierra specifically indicates an issue with the cylinder 8 glow plug control circuit experiencing low voltage. Common causes include Faulty glow plug: The glow plug itself may be defective and not heating up properly, Wiring or connector issues: Damaged or corroded wiring or connectors in the glow plug control circuit can prevent proper voltage delivery, Glow plug control module failure: A malfunctioning control module can disrupt the operation of the glow plug. 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 2014 GMC Sierra indicates Cylinder 8 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty glow plug: The glow plug itself may be defective and not heating up properly, Wiring or connector issues: Damaged or corroded wiring or connectors in the glow plug control circuit can prevent proper voltage delivery, Glow plug control module failure: A malfunctioning control module can disrupt the operation of the glow plug.
- 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 P068E 2014 GMC Sierra Description
The diagnostic trouble code P068E for a 2014 GMC Sierra specifically indicates an issue with the cylinder 8 glow plug control circuit experiencing low voltage. Glow plugs are essential components in diesel engines, as they heat up the combustion chamber to ensure proper ignition of the fuel-air mixture, especially during cold starts. The glow plug control module regulates the operation of the glow plugs, including when they should be activated and for how long.
Common Causes of P068E 2014 GMC Sierra
- Faulty glow plug: The glow plug itself may be defective and not heating up properly.
- Wiring or connector issues: Damaged or corroded wiring or connectors in the glow plug control circuit can prevent proper voltage delivery.
- Glow plug control module failure: A malfunctioning control module can disrupt the operation of the glow plug.
- Electrical system problems: Issues with the vehicle's electrical system, such as a weak battery or alternator, can affect the voltage supply to the glow plug.
Symptoms of P068E 2014 GMC Sierra
- Hard starting: Difficulty starting the engine, especially in cold weather, can be a common symptom of a malfunctioning glow plug in cylinder 8.
- Rough idling: The engine may run rough or unevenly at idle if the glow plug is not functioning properly.
- Decreased fuel efficiency: A faulty glow plug can lead to incomplete combustion, resulting in decreased fuel efficiency.
- Illuminated check engine light: The P068E trouble code will trigger the check engine light on the dashboard, indicating a problem with the glow plug control circuit.
How to Fix P068E 2014 GMC Sierra
- Diagnose the issue: Use a diagnostic scanner to retrieve the trouble code and perform a thorough inspection of the glow plug, wiring, connectors, and control module.
- Test the glow plug: Check the resistance of the glow plug to determine if it is functioning correctly.
- Inspect wiring and connectors: Look for any signs of damage, corrosion, or loose connections in the glow plug control circuit.
- Replace faulty components: Replace the defective glow plug, wiring, connectors, or control module as needed to restore proper operation.
- Clear the trouble code: After completing the repair, clear the trouble code from the vehicle's computer using the diagnostic scanner.
Cost to Fix P068E 2014 GMC Sierra
The typical repair costs for addressing a cylinder 8 glow plug control circuit low voltage issue can vary depending on the specific components that need to be replaced. In general, the cost of a new glow plug can range from $20 to $50, while a glow plug control module can cost between $100 and $300. Labor costs at auto repair shops typically range from $80 to $150 per hour, and the total repair bill can add up to several hundred dollars, including parts and labor.
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Frequently Asked Questions about P068E 2014 GMC Sierra Code
1. What does the OBDII code P068E mean on a 2014 GMC Sierra?
P068E refers to an issue with the Cylinder 8 Glow Plug Control Circuit, specifically low voltage detected in the circuit.
2. What are the common symptoms of P068E on a 2014 GMC Sierra?
Symptoms may include difficulty starting in cold weather, reduced engine performance, a check engine light, and increased emissions.
3. What causes the P068E code on a 2014 GMC Sierra?
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.
4. Can I still drive my 2014 GMC Sierra with a P068E code?
While the truck may be drivable, starting issues in cold weather and reduced efficiency might occur. Prompt diagnosis and repair are recommended to avoid potential damage.
5. How do I diagnose the P068E code on a 2014 GMC Sierra?
Use an OBDII scanner to confirm the code, inspect the wiring and connectors for damage, test the glow plug for continuity, and check the glow plug control module for proper operation.
6. How do I fix the P068E code on my 2014 GMC Sierra?
Repairs may include replacing the faulty glow plug, repairing damaged wiring, cleaning or replacing corroded connectors, or replacing the glow plug control module if needed.
7. How much does it cost to fix the P068E code on a 2014 GMC Sierra?
Repair costs can vary but typically range from $100 to $300 depending on whether the issue lies with the glow plug, wiring, or control module.
8. Can a weak battery cause the P068E code in a 2014 GMC Sierra?
Yes, a weak or failing battery can contribute to low voltage in the glow plug circuit and trigger the P068E code.
9. What tools are needed to troubleshoot the P068E code on a 2014 GMC Sierra?
Basic tools include an OBDII scanner, a multimeter for voltage and continuity tests, and possibly a socket set for removing the glow plug.
10. Does the P068E code affect fuel efficiency in a 2014 GMC Sierra?
Yes, a malfunctioning glow plug can lead to incomplete combustion, which may decrease fuel efficiency and increase emissions.
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