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P06C5 OBD2: Cylinder 1 Glow Plug Incorrect

P06C5 OBD2: Cylinder 1 Glow Plug Incorrect

The P06C5 OBD-II code indicates an issue with the glow plug for cylinder one in a diesel engine, specifically that it is either not functioning correctly or is missing altogether. Glow plugs are essential for preheating the combustion chamber to ensure smooth engine starts, particularly in cold weather conditions.

What Does the P06C5 Code Mean?

The P06C5 code signifies that the engine control module (PCM) has detected a malfunction with the glow plug for cylinder one. This means that the glow plug is either not providing the necessary heat to start the engine efficiently or is completely non-functional.

What Causes the P06C5 Code?

Several factors can lead to the P06C5 code being triggered, including:

  • Glow plug control module failure
  • Glow plug failure
  • Glow plug wiring harness failure

What Are the Symptoms of the P06C5 Code?

Drivers may experience a few symptoms when the P06C5 code is present, primarily:

  • Hard or no start in cold weather
  • Engine may not start at all

How Serious Is the P06C5 Code?

The P06C5 code is categorized as urgent. It indicates a significant malfunction that can lead to severe engine damage or create hazardous conditions for the driver and passengers. Immediate attention is recommended.

How to Diagnose the P06C5 Code

To accurately diagnose the P06C5 code, a mechanic should follow these steps:

  • Use an OBD-II scanner to confirm the P06C5 code and check for any other related codes.
  • Inspect the glow plug and its wiring harness for any visible damage or corrosion.
  • Test the glow plug control module to ensure it is functioning correctly.
  • Perform resistance tests on the glow plug itself to determine if it is operational.

Common Repairs for the P06C5 Code

Common repairs that may be needed to resolve the P06C5 code include:

  • Replacing the glow plug
  • Repairing or replacing the glow plug wiring harness
  • Replacing the glow plug control module

How Much Does It Cost to Fix the P06C5 Code?

The cost to fix the P06C5 code can vary widely depending on the specific issue and labor costs in your area. Typical repair costs may range from $150 to $400, depending on whether parts need to be replaced or if further diagnostics are necessary.

Can I Fix the P06C5 Code Myself?

While it is possible to address the P06C5 code yourself, it is important to have a good understanding of diesel engine components and electrical systems. If you are not experienced with automotive repairs, it is recommended to seek professional assistance to ensure proper diagnosis and repair.

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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