P0672 on Chevrolet
Cylinder 2 Glow Plug Circuit
P0672 on Chevrolet vehicles indicates cylinder 2 glow plug circuit. Au7o has documented this code across 1 Chevrolet model — most commonly on Silverado 3500HD. P0672 is a diesel-engine code indicating a fault in the glow plug circuit for cylinder number 2. Glow plugs heat the combustion chamber to help a diesel engine start, especially in cold weather, and the control module monitors each plug's circuit electrically. When it detects an open, short, or out-of-range condition on the cylinder 2 glow plug circuit, it sets this code. It generally causes hard cold starts, rough running until warm, and possibly white smoke on startup, while the check engine or glow plug light may illuminate. Typical repair costs on Chevrolet range from $200 to $800, depending on the specific model and root cause.
Common Causes of P0672
- •Failed (open or shorted) glow plug on cylinder 2
- •Corroded or loose glow plug connector/terminal
- •Damaged or broken glow plug wiring/harness
- •Faulty glow plug control module or relay
- •High resistance/corrosion at the glow plug bus bar or strap
- •Poor ground connection in the glow plug circuit
- •Blown fuse feeding the glow plug circuit
P0672 on Chevrolet by Model
Chevrolet Silverado 3500HD(1 issue)
- Glow Plug Failure and Hard Cold Starting2001-2020
Glow plugs fail causing difficult cold weather starting. Can also swell and break during removal, requiring extraction. Glow plug module can also fail.
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View P0672 across all makes →Frequently Asked Questions
What does P0672 mean on Chevrolet?▼
P0672 stands for "Cylinder 2 Glow Plug Circuit." P0672 is a diesel-engine code indicating a fault in the glow plug circuit for cylinder number 2. Glow plugs heat the combustion chamber to help a diesel engine start, especially in cold weather, and the control module monitors each plug's circuit electrically. When it detects an open, short, or out-of-range condition on the cylinder 2 glow plug circuit, it sets this code. It generally causes hard cold starts, rough running until warm, and possibly white smoke on startup, while the check engine or glow plug light may illuminate. On Chevrolet specifically, this code is documented across 1 model.
What causes P0672 on Chevrolet vehicles?▼
Common causes on Chevrolet: Failed (open or shorted) glow plug on cylinder 2, Corroded or loose glow plug connector/terminal, Damaged or broken glow plug wiring/harness, Faulty glow plug control module or relay, High resistance/corrosion at the glow plug bus bar or strap. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0672 on a Chevrolet?▼
Repair costs on Chevrolet range from $200 to $800, depending on the specific model and root cause.
Which Chevrolet models have P0672 documented?▼
Au7o has documented P0672 on 1 Chevrolet model: Silverado 3500HD.