What are the common causes of P0676?

A failed glow plug in cylinder 6. An open in the glow plug feed wire. Corrosion at the glow plug connector. A weak battery or low charging voltage. A failed glow plug relay.

Check the glow plug resistance at cylinder 6. Inspect the connector and feed wire for corrosion. Test the feed for voltage during key on. Replace the glow plug if its coil reads open. Check the battery and charging system. Clear the code and retest.

P0676

Cylinder 6 Glow Plug Circuit/Open

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

What it means

P0676 means Cylinder 6 Glow Plug Circuit/Open.

Check these first

A failed glow plug in cylinder 6
An open in the glow plug feed wire
Corrosion at the glow plug connector
A weak battery or low charging voltage
A failed glow plug relay

What to do next

Check the glow plug resistance at cylinder 6
Inspect the connector and feed wire for corrosion
Test the feed for voltage during key on
Replace the glow plug if its coil reads open
Check the battery and charging system
Clear the code and retest

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Updated

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