AutoCodes – Ford – P06C8 Ford

P06C8 Ford Code - Cylinder 4 Glow Plug Incorrect

Quick Answer

The glow plug system is used to assist in providing the heat required to begin combustion during cold engine temperatures. Common causes include Faulty cylinder #4 glow plug, Cylinder #4 glow plug harness is open or shorted, Cylinder #4 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: P06C8 Ford indicates Cylinder 4 Glow Plug Incorrect.
Common causes: Common causes include Faulty cylinder #4 glow plug, Cylinder #4 glow plug harness is open or shorted, Cylinder #4 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.

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Code Popularity 1,100

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 08, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P06C8 Ford Description

The glow plug system is used to assist in providing the heat required to begin combustion during cold engine temperatures. The glow plugs are heated before and during cranking, as well as initial engine operation. The Engine Control Module (ECM) controls the glow plug ON times by monitoring coolant temperature and glow plug voltage. The Glow Plug system has eight individual glow plug supply circuits between the controller and the glow plugs. If the feedback voltage from the controller to the ECM is not within range, the ECM sets the OBDII code.

OBDII Code P06C8 Ford - Cylinder 4 Glow Plug Incorrect - AutoCodes.com — P06C8 Ford Code - Cylinder 4 Glow Plug Incorrect

What does this mean?

What are the Possible Causes of the DTC P06C8 Ford?

Faulty cylinder #4 glow plug
Cylinder #4 glow plug harness is open or shorted
Cylinder #4 glow plug circuit poor electrical connection
Faulty glow plug module

How to Fix the DTC P06C8 Ford?

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 P06C8 Ford 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P06C8 Ford Code

1. What does the OBDII code P06C8 mean on a Ford vehicle?

P06C8 indicates "Cylinder 4 Glow Plug Incorrect," meaning the glow plug in cylinder 4 is not operating as expected, often due to a malfunction or electrical issue.

2. What are the common symptoms of the P06C8 code?

Symptoms include difficulty starting the engine, especially in cold weather, rough idling, reduced fuel efficiency, and possible illumination of the check engine light.

3. What causes the P06C8 code to appear?

Common causes include a faulty glow plug, damaged wiring or connectors in the glow plug circuit, a defective glow plug control module, or an issue with the Engine Control Module (ECM).

4. Can I drive my Ford vehicle with the P06C8 code?

While the vehicle may still drive, continuing to operate it with this code can lead to poor performance, starting issues, and potential damage to the glow plug system or engine.

5. How can I diagnose the P06C8 code on my Ford?

Start by using an OBDII scanner to confirm the code, then inspect the cylinder 4 glow plug, wiring, and connectors for damage or corrosion. Test the glow plug with a multimeter for proper resistance.

6. How do I fix the P06C8 code?

Repairs may include replacing the faulty glow plug, repairing or replacing damaged wiring or connectors, or replacing the glow plug control module if necessary.

7. How much does it cost to fix the P06C8 code?

The cost depends on the specific repair but typically ranges from $50 to $200 for a glow plug replacement, plus labor if done by a mechanic.

8. What tools are needed to fix the P06C8 code?

Common tools include an OBDII scanner, multimeter, basic hand tools, and possibly a torque wrench for proper glow plug installation.

9. Can a P06C8 code cause other engine problems?

Yes, unresolved issues with the glow plug system can lead to poor combustion, increased emissions, and long-term engine damage if not addressed promptly.

10. How can I prevent the P06C8 code from occurring again?

Regular maintenance, including inspecting the glow plug system, replacing worn components, and keeping wiring and connectors clean and secure, can help prevent this code.