P068E 2016 Chevrolet Silverado Code - Cylinder 8 Glow Plug Control Circuit Low Voltage
Quick Answer
n the diesel engine, air alone is compressed in the cylinder. Common causes include Faulty cylinder #8 glow plug, Cylinder #8 glow plug harness is open or shorted, Cylinder #8 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
- P068E 2016 Chevrolet Silverado indicates Cylinder 8 Glow Plug Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty cylinder #8 glow plug, Cylinder #8 glow plug harness is open or shorted, Cylinder #8 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.
Code P068E 2016 Chevrolet Silverado Description
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.
What are the Possible Causes of the DTC P068E 2016 Chevrolet Silverado?
- Faulty cylinder #8 glow plug
- Cylinder #8 glow plug harness is open or shorted
- Cylinder #8 glow plug circuit poor electrical connection
- Faulty Glow Plug Control Module
How to Fix the DTC P068E 2016 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 P068E 2016 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 P068E 2016 Chevrolet Silverado code?
Need more information on how to fix the P068E 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P068E 2016 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
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.
Discuss the causes and fixes for P068E 2016 Chevrolet Silverado OBDII Code
Code P068E 2016 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
