P068F 2014 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 2014 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 2014 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 2014 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 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 P068F 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.
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Frequently Asked Questions about P068F 2014 Chevrolet Silverado Code
What does the OBDII code P068F mean for a 2014 Chevrolet Silverado?
P068F indicates an issue with the glow plug control module, specifically that it is detecting high voltage in the Cylinder 8 glow plug control circuit.
What are the common symptoms of code P068F in a 2014 Chevrolet Silverado?
Symptoms may include a check engine light, hard starting in cold weather, rough idling, decreased fuel efficiency, or a noticeable lack of power.
What causes the P068F code to appear in a 2014 Chevrolet Silverado?
Common causes include a faulty glow plug control module, damaged wiring or connectors in the glow plug circuit, or a failed Cylinder 8 glow plug.
Can I drive my 2014 Chevrolet Silverado with the P068F code?
Driving with this code is generally possible, but it may result in harder starts and reduced engine performance, especially in cold weather. Prolonged issues may cause further damage.
How can I diagnose the P068F code on a 2014 Chevrolet Silverado?
Start by inspecting the wiring and connectors for Cylinder 8 and the glow plug control module. Use a multimeter to check for high voltage and test the glow plug for proper operation.
What tools do I need to troubleshoot the P068F code?
You’ll need an OBDII scanner, a multimeter, and potentially a wiring diagram for the glow plug control circuit to diagnose the issue accurately.
How do I fix the P068F code on my 2014 Chevrolet Silverado?
Repairs may include replacing the faulty glow plug, repairing damaged wiring or connectors, or replacing the glow plug control module if it’s defective.
How much does it cost to repair the P068F code on a 2014 Chevrolet Silverado?
Costs vary depending on the repair, but replacing a glow plug typically costs $50–$150, while a new glow plug control module can range from $200–$400 plus labor.
Can a bad glow plug cause other issues in my 2014 Chevrolet Silverado?
Yes, a faulty glow plug can cause poor cold starts, increased emissions, and additional strain on the glow plug control module or battery.
How do I prevent the P068F code from recurring in my 2014 Chevrolet Silverado?
Regular maintenance, such as inspecting the glow plugs and wiring, can help prevent issues. Replacing glow plugs as recommended by the manufacturer is also important.
Discuss the causes and fixes for P068F 2014 Chevrolet Silverado OBDII Code
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