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Engine-Codes – Generic – P0680

P0680 Code - Cylinder 10 Glow Plug Circuit Fault

Quick Answer

The P0680 diagnostic trouble code indicates a fault in the cylinder 10 glow plug circuit. Common causes include Faulty glow plug in cylinder 10, Wiring or connection issues in the glow plug circuit, Faulty glow plug relay. 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
P0680 indicates Cylinder 10 Glow Plug Circuit Fault.
Common causes
Common causes include Faulty glow plug in cylinder 10, Wiring or connection issues in the glow plug circuit, Faulty glow plug relay.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 18, 2024
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Code P0680 Description

The P0680 diagnostic trouble code indicates a fault in the cylinder 10 glow plug circuit. Glow plugs are used in diesel engines to help with cold starts by heating the combustion chamber. Cylinder 10 refers to the specific cylinder in the engine where the issue is located. When this circuit malfunctions, it can lead to difficulties starting the engine, reduced engine performance, increased emissions, and potential damage to other engine components.

OBDII Code P0680 - Cylinder 10 Glow Plug Circuit Fault
P0680 Code - Cylinder 10 Glow Plug Circuit Fault

Common Causes of P0680

  1. Faulty glow plug in cylinder 10
  2. Wiring or connection issues in the glow plug circuit
  3. Faulty glow plug relay
  4. Corrosion or damage to the electrical connections
  5. Engine control module (ECM) failure

Symptoms of P0680

  1. Hard starting or extended cranking time
  2. Rough idling or misfiring
  3. Decreased fuel efficiency
  4. Illuminated Check Engine Light
  5. White smoke from the exhaust

How to Fix P0680

  1. Diagnose the specific glow plug in cylinder 10 using a multimeter
  2. Inspect and repair any damaged wiring or connections in the glow plug circuit
  3. Replace the faulty glow plug relay if necessary
  4. Clear the trouble code from the ECM using a diagnostic scanner
  5. Test the vehicle to ensure the issue has been resolved

Cost to Fix P0680

The cost of repairing a cylinder 10 glow plug circuit fault can vary depending on the cause of the issue and the specific components that need to be replaced. On average, the repair cost can range from $150 to $400, including parts and labor. Keep in mind that labor rates at auto repair shops can vary, so it's recommended to obtain quotes from multiple sources to get an accurate estimate.

When is the Code Detected?

The Engine Control Module (ECM) has detected a fault in the cylinder #10 glow plug circuit

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Code P0680 Information for Specific Makes

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.

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