P0676 Cylinder 6 Glow Plug Circuit

P0676 points to a cylinder 6 glow plug circuit problem. The glow plug path for cylinder 6 shows an open, short, or abnormal current draw.

Code status

Needs verification

Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.

System: Computer
Scope: iso-sae-controlled-p0
Standard: SAE J2012 / ISO 15031-6
Source: legacy-import

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not ignore high resistance in the harness or connector when the glow plug itself tests within range.

Useful checks before replacing parts

Check cylinder 6 glow plug resistance, module command voltage, current draw, connector condition, battery voltage, and freeze-frame starting temperature.
Inspect the cylinder 6 glow plug lead, terminal fit, harness routing near heat, corrosion, module output pin, and possible open or short circuits.
Compare cylinder 6 electrical response with adjacent cylinders before deciding whether the plug or module output is faulty.

Related OBD-II codes

These nearby computer entries can help compare wording and fault area. They may share the same verification status as the source database.