P068F 2017 Chevrolet Silverado Code - Cylinder 8 Glow Plug Control Circuit High 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
- P068F 2017 Chevrolet Silverado indicates Cylinder 8 Glow Plug Control Circuit High 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 P068F 2017 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 P068F 2017 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 P068F 2017 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 P068F 2017 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 P068F 2017 Chevrolet Silverado code?
Need more information on how to fix the P068F 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P068F 2017 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P068F 2017 Chevrolet Silverado Code
1. What does the OBDII code P068F mean on a 2017 Chevrolet Silverado?
P068F indicates an issue with the Cylinder 8 Glow Plug Control Circuit experiencing high voltage, often linked to the glow plug system or related wiring.
2. What are common symptoms of code P068F in a 2017 Chevrolet Silverado?
Symptoms may include difficulty starting the engine, reduced engine performance, increased emissions, and the check engine light being illuminated.
3. What causes the P068F code in the 2017 Chevrolet Silverado?
Common causes include a faulty glow plug for cylinder 8, damaged wiring or connectors in the glow plug circuit, or a malfunctioning glow plug control module.
4. Can you drive with the P068F code on a 2017 Chevrolet Silverado?
While the vehicle may be drivable, ignoring this code can lead to starting issues in cold weather and potentially damage other components over time.
5. How is the P068F code diagnosed on a 2017 Chevrolet Silverado?
A mechanic will typically use a scan tool to read the code, inspect the glow plug and its wiring for damage, and test the glow plug control module for proper operation.
6. How do you fix the P068F code on a 2017 Chevrolet Silverado?
Possible fixes include replacing the faulty glow plug for cylinder 8, repairing or replacing damaged wiring or connectors, or replacing the glow plug control module if needed.
7. How much does it cost to repair code P068F on a 2017 Chevrolet Silverado?
Repair costs can range from $100 to $400 depending on whether the glow plug, wiring, or control module needs replacement.
8. Can a bad glow plug cause P068F on a 2017 Chevrolet Silverado?
Yes, a bad glow plug for cylinder 8 can cause high voltage in the circuit, triggering the P068F code.
9. Does the P068F code affect engine performance on a 2017 Chevrolet Silverado?
Yes, it may impact starting performance, especially in cold weather, and can lead to increased emissions and reduced fuel efficiency.
10. How can I prevent the P068F code from appearing again on my 2017 Chevrolet Silverado?
Regular maintenance of the glow plug system, including checking for damaged wiring and replacing glow plugs as needed, can help prevent this issue.
Discuss the causes and fixes for P068F 2017 Chevrolet Silverado OBDII Code
Code P068F 2017 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.
