What are the common causes of P067C?

A shorted cylinder 5 glow plug or a shorted feed wire. A failed glow plug control module channel for cylinder 5. Corrosion or water in the cylinder 5 connector. A weak battery during the glow cycle. A chafed glow plug harness grounding out.

Check battery voltage during the glow cycle. Test cylinder 5 glow plug resistance against the other cylinders. Inspect the cylinder 5 harness for chafes or shorts to ground. Check the glow plug control module output for cylinder 5. Replace the cylinder 5 glow plug if it reads shorted. Clear the code and retest.

P067C

Cylinder 5 Glow Plug Control Circuit Low

System: Computer output circuits (P code)
Lamp: Check Engine Light
Category: Powertrain - Computer and Auxiliary Controls

What it means

P067C means Cylinder 5 Glow Plug Control Circuit Low.

Check these first

A shorted cylinder 5 glow plug or a shorted feed wire
A failed glow plug control module channel for cylinder 5
Corrosion or water in the cylinder 5 connector
A weak battery during the glow cycle
A chafed glow plug harness grounding out

What to do next

Check battery voltage during the glow cycle
Test cylinder 5 glow plug resistance against the other cylinders
Inspect the cylinder 5 harness for chafes or shorts to ground
Check the glow plug control module output for cylinder 5
Replace the cylinder 5 glow plug if it reads shorted
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.