P068E 2017 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 2017 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 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 P068E 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 P068E 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 P068E 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.
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Frequently Asked Questions about P068E 2017 Chevrolet Silverado Code
1. What does the OBDII code P068E mean on a 2017 Chevrolet Silverado?
P068E indicates a low voltage issue in the Cylinder 8 Glow Plug Control Circuit, which is part of the engine's glow plug system used to aid cold starting in diesel engines.
2. What are common symptoms of code P068E in a 2017 Chevrolet Silverado?
Symptoms may include difficulty starting the engine in cold weather, a rough idle, reduced engine performance, and the illumination of the check engine light.
3. What causes the P068E code to appear on a 2017 Chevrolet Silverado?
Common causes include a faulty glow plug for Cylinder 8, damaged wiring or connectors in the glow plug circuit, a malfunctioning glow plug control module, or low system voltage.
4. How can I diagnose the P068E code on my 2017 Chevrolet Silverado?
Start by checking the Cylinder 8 glow plug and its wiring for damage. Use a multimeter to test the glow plug's resistance and inspect the control module for proper function.
5. Can I drive my 2017 Chevrolet Silverado with the P068E code active?
While the vehicle may still run, driving with this code can cause hard starting in cold weather and potentially lead to further damage to the glow plug system. It’s best to address the issue promptly.
6. How do I fix the P068E code on a 2017 Chevrolet Silverado?
Repairs may involve replacing the faulty Cylinder 8 glow plug, repairing damaged wiring or connectors, or replacing the glow plug control module if necessary.
7. How much does it cost to repair the P068E code on a 2017 Chevrolet Silverado?
Repair costs vary but may range from $150 to $400, depending on whether the glow plug, wiring, or control module needs replacement.
8. Can a dead battery cause the P068E code on a 2017 Chevrolet Silverado?
Yes, a weak or dead battery can cause low voltage in the glow plug circuit, triggering the P068E code. Ensure the battery is fully charged and in good condition.
9. How do I prevent the P068E code from recurring in my 2017 Chevrolet Silverado?
Regularly inspect the glow plug system, ensure proper battery maintenance, and address any electrical issues promptly to prevent low voltage or circuit failures.
10. Will clearing the P068E code fix the problem on my 2017 Chevrolet Silverado?
Clearing the code will turn off the check engine light temporarily, but the underlying issue must be repaired to prevent the code from returning.
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