OBD
P069B
Cylinder 9 Glow Plug Control Circuit High
What it means
P069B means Cylinder 9 Glow Plug Control Circuit High.
Check these first
- A short to voltage in the cylinder 9 control wire
- A failed glow plug in cylinder 9
- A corroded control connector
- A failed glow plug control module
- Damaged control wiring
What to do next
- Monitor the cylinder 9 control voltage
- Trace the wire for a short to power
- Test the glow plug
- Inspect the harness
- Replace the module if voltage stays high
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.