P06C9 2016 Chevrolet Silverado Code - Cylinder 5 Glow Plug Incorrect
Quick Answer
n the diesel engine, air alone is compressed in the cylinder. Common causes include Faulty cylinder #1 glow plug, Cylinder #1 glow plug harness is open or shorted, Cylinder #1 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
- P06C9 2016 Chevrolet Silverado indicates Cylinder 5 Glow Plug Incorrect.
- Common causes
- Common causes include Faulty cylinder #1 glow plug, Cylinder #1 glow plug harness is open or shorted, Cylinder #1 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 P06C9 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. A Diagnostic Trouble Code (DTC) will be set if the Glow Plug resistance is not within a calibrated range.
What are the Possible Causes of the DTC P06C9 2016 Chevrolet Silverado?
- Faulty cylinder #1 glow plug
- Cylinder #1 glow plug harness is open or shorted
- Cylinder #1 glow plug circuit poor electrical connection
- Faulty Glow Plug Control Module
How to Fix the DTC P06C9 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 P06C9 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.
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Frequently Asked Questions about P06C9 2016 Chevrolet Silverado Code
1. What does the OBDII code P06C9 mean on a 2016 Chevrolet Silverado?
P06C9 indicates "Cylinder 5 Glow Plug Incorrect," meaning the Engine Control Module (ECM) has detected an issue with the glow plug circuit or function in cylinder 5.
2. What are the common symptoms of code P06C9 in a 2016 Chevrolet Silverado?
Symptoms may include difficulty starting the engine in cold weather, rough idling, poor fuel efficiency, and an illuminated Check Engine Light.
3. What causes the P06C9 code to appear on a 2016 Chevrolet Silverado?
Common causes include a faulty glow plug, damaged glow plug wiring or connectors, a malfunctioning glow plug control module, or an ECM issue.
4. How can I diagnose the P06C9 code on my Silverado?
Start by inspecting the glow plug for cylinder 5, checking for physical damage or carbon buildup. Test the glow plug's resistance and inspect the wiring and connectors for corrosion or breaks.
5. Can I drive my 2016 Chevrolet Silverado with the P06C9 code?
Driving with this code is generally safe in warm weather, but it may lead to hard starts or engine misfires in colder conditions. Prolonged driving without repair could worsen the problem.
6. How do I fix the P06C9 code on a 2016 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.
7. How much does it cost to fix the P06C9 code on a 2016 Chevrolet Silverado?
The cost to replace a glow plug typically ranges from $100 to $300, including parts and labor. Additional repairs, such as wiring fixes, may increase the cost.
8. Can a bad ECM trigger the P06C9 code on my Silverado?
Yes, a malfunctioning ECM can cause false readings or fail to properly control the glow plug, though this is less common than a problem with the glow plug or its circuit.
9. How do glow plugs affect starting my 2016 Silverado?
Glow plugs preheat the air in the combustion chamber to help the diesel engine start, especially in cold weather. A faulty glow plug may cause hard starts or failure to start.
10. Will clearing the P06C9 code fix the issue permanently?
Clearing the code may temporarily turn off the Check Engine Light, but the root cause must be addressed to prevent the code from returning.
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