P0682 - Cylinder 12 Glow Plug Circuit

The ECM detected a fault in glow plug circuit for cylinder 12.

Code Overview

The ECM detected a fault in glow plug circuit for cylinder 12.

Common Causes

• Failed glow plug on cylinder 12
• Damaged wiring or connector at cylinder 12 glow plug
• Glow plug control module or power-supply issue

Diagnostic Steps

1. Inspect glow plug 12 wiring and connector condition
2. Check resistance and power feed to the glow plug circuit
3. Look for fuse, relay, or module faults before replacing parts

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.