OBD
P0681
Cylinder 11 Glow Plug Circuit/Open
What it means
P0681 means Cylinder 11 Glow Plug Circuit/Open.
Check these first
- An open glow plug in cylinder 11
- A break in the glow plug harness
- A corroded glow plug connector
- A faulty glow plug module
- A weak battery
What to do next
- Check the cylinder 11 glow plug resistance
- Trace the harness for a break or corrosion
- Test the module output
- Verify battery voltage under load
- Replace the glow plug if it reads open
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.