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P06C7 OBD2: Cylinder 3 Glow Plug Incorrect

P06C7 OBD2: Cylinder 3 Glow Plug Incorrect

The P06C7 code is an OBD-II trouble code indicating an issue with the glow plug for cylinder 3 in diesel engines. This code indicates that the engine control module (PCM) has detected that the glow plug is not functioning as expected.

What Does the P06C7 Code Mean?

The P06C7 code signifies that there is an incorrect operation of the glow plug for cylinder 3. Glow plugs are essential for preheating the cylinders in diesel engines, especially in cold weather, to ensure proper combustion and engine start-up.

What Causes the P06C7 Code?

There are several potential causes for the P06C7 code, including:

  • Glow plug failure
  • Glow plug control module failure
  • Wiring harness issues related to the glow plug

What Are the Symptoms of the P06C7 Code?

Common symptoms associated with the P06C7 code include:

  • Engine may not start
  • Hard starting in cold weather

How Serious Is the P06C7 Code?

The P06C7 code is classified as urgent. Ignoring this code can lead to severe engine damage and create safety hazards for the driver and passengers. Immediate attention is recommended to avoid further complications.

How to Diagnose the P06C7 Code

To properly diagnose the P06C7 code, follow these steps:

  1. Use an OBD-II scanner to confirm the presence of the P06C7 code.
  2. Inspect the glow plug wiring harness for any signs of damage or corrosion.
  3. Test the glow plug itself for resistance and functionality.
  4. Check the glow plug control module for proper operation.

Common Repairs for the P06C7 Code

Repairs for the P06C7 code may include:

  • Replacing the faulty glow plug
  • Repairing or replacing the glow plug control module
  • Fixing wiring harness issues associated with the glow plug

How Much Does It Cost to Fix the P06C7 Code?

The cost to repair the P06C7 code can vary widely depending on the specific issue. On average, you might expect to pay between $150 and $500, depending on parts and labor. Replacing a glow plug is typically less expensive than replacing the control module.

Can I Fix the P06C7 Code Myself?

While some DIY enthusiasts may be able to handle the replacement of glow plugs, it is advisable to consult with a professional mechanic for a complete diagnosis and repair, especially if you are not familiar with diesel engine systems.

About JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

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