P06C9 Chevrolet 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 Chevrolet 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 Chevrolet 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 Chevrolet?
- 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 Chevrolet?
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 Chevrolet 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 P06C9 Chevrolet code?
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Need Help with the Code?
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Information for Specific Chevrolet Models
- P06C9 2014 Chevrolet Silverado — Cylinder 5 Glow Plug Incorrect
- P06C9 2015 Chevrolet Silverado — Cylinder 5 Glow Plug Incorrect
- P06C9 2016 Chevrolet Silverado — Cylinder 5 Glow Plug Incorrect
- P06C9 2017 Chevrolet Silverado — Cylinder 5 Glow Plug Incorrect
- P06C9 2018 Chevrolet Silverado — Cylinder 5 Glow Plug Incorrect
Frequently Asked Questions about P06C9 Chevrolet Code
1. What does the OBDII code P06C9 mean for a Chevrolet?
P06C9 indicates that the Engine Control Module (ECM) has detected an issue with the glow plug in cylinder 5, specifically that it’s functioning incorrectly.
2. What are the symptoms of a P06C9 code in a Chevrolet vehicle?
Common symptoms include difficulty starting the engine in cold weather, rough idling, reduced power, and the Check Engine Light being illuminated.
3. What causes the P06C9 code to appear in a Chevrolet?
The most common causes are a faulty glow plug in cylinder 5, damaged glow plug wiring or connectors, a malfunctioning glow plug control module, or an issue with the ECM.
4. Can I drive my Chevrolet with a P06C9 code?
While the vehicle may still be drivable, ignoring this code can lead to starting issues, reduced engine performance, and potential damage to other engine components over time.
5. How do I diagnose a P06C9 code in my Chevrolet?
Start by inspecting the glow plug and its wiring for damage or corrosion. Then, test the cylinder 5 glow plug for proper resistance and functionality. If necessary, check the glow plug control module or ECM for faults.
6. How is the P06C9 code fixed on a Chevrolet?
Common fixes include replacing the faulty glow plug in cylinder 5, repairing or replacing damaged wiring or connectors, and replacing the glow plug control module if it’s malfunctioning.
7. How much does it cost to repair a P06C9 code on a Chevrolet?
The cost can vary depending on the issue. Replacing a single glow plug typically costs $50-$150, while repairing wiring or replacing the glow plug control module can cost more.
8. Can a bad glow plug in cylinder 5 damage my Chevrolet engine?
A bad glow plug itself won’t directly damage the engine, but it can lead to harder starts, increased emissions, and stress on other components, which may cause damage over time.
9. How can I prevent a P06C9 code from occurring in my Chevrolet?
Regular maintenance, including checking and replacing glow plugs as recommended, inspecting wiring for wear, and ensuring the glow plug system is functioning properly, can help prevent this code.
10. Will clearing the P06C9 code fix the issue on my Chevrolet?
Clearing the code may temporarily turn off the Check Engine Light, but the underlying issue must be diagnosed and repaired to prevent the code from returning.
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