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P0671 Chevrolet Code - Cylinder 1 Glow Plug Circuit Fault

Quick Answer

The P0671 code for Chevrolet vehicles indicates a fault in the glow plug circuit for cylinder 1. Common causes include Faulty glow plug in cylinder 1, Wiring or connection issues in the glow plug circuit, Malfunctioning glow plug control module. 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
P0671 Chevrolet indicates Cylinder 1 Glow Plug Circuit Fault.
Common causes
Common causes include Faulty glow plug in cylinder 1, Wiring or connection issues in the glow plug circuit, Malfunctioning glow plug control module.
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 Sep 12, 2024
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Code P0671 Chevrolet Description

The P0671 code for Chevrolet vehicles indicates a fault in the glow plug circuit for cylinder 1. Glow plugs are crucial components in diesel engines, as they heat the combustion chamber to aid in cold starting. When the engine is started, the glow plug circuit is activated to warm up the plugs before the engine reaches operating temperature. A fault in this circuit can lead to difficulty starting the engine, rough idling, decreased fuel efficiency, and increased emissions.

OBDII Code P0671 Chevrolet - Cylinder 1 Glow Plug Circuit Fault
P0671 Chevrolet Code - Cylinder 1 Glow Plug Circuit Fault

Common Causes of P0671 Chevrolet

  1. Faulty glow plug in cylinder 1
  2. Wiring or connection issues in the glow plug circuit
  3. Malfunctioning glow plug control module
  4. Corrosion or damage to the glow plug relay
  5. Electrical issues such as a blown fuse or short circuit in the circuit

Symptoms of P0671 Chevrolet

  1. Difficulty starting the engine, especially in cold weather
  2. Rough idling or engine misfires
  3. Decreased fuel efficiency
  4. Increased emissions
  5. Illumination of the Check Engine Light

How to Fix P0671 Chevrolet

  1. Diagnose the exact cause of the fault by using a scan tool to retrieve the trouble code and testing the glow plug and related components.
  2. Inspect the glow plug in cylinder 1 for proper operation and replace if necessary.
  3. Check the wiring and connections in the glow plug circuit for any damage or corrosion, repairing or replacing as needed.
  4. Test the glow plug control module and relay for functionality and replace if found defective.
  5. Clear the trouble code from the vehicle's computer and test the vehicle to ensure the issue has been resolved.

Cost to Fix P0671 Chevrolet

The cost of repairing a cylinder 1 glow plug circuit fault can vary depending on the specific cause of the issue and the location of the repair. Typically, replacing a glow plug can range from $50 to $150 per plug, with additional costs for labor. The total repair cost, including parts and labor, may range from $150 to $400. However, it's important to note that labor rates can vary significantly based on the shop's location, the vehicle's make and model, and the type of engine. It's recommended to obtain quotes from local auto repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P0671 Chevrolet









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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.

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